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MCCA

MANUFACTURERS COUNCIL ON COLOR AND APPEARANCE

COLLABORATIVE REFERENCE PROGRAM

COLOR AND APPEARANCE

COLOR AND COLOR DIFFERENCE

REPORT NO. 22

D.8. DEPARTMENT OF COMMERCE

National Bureau of Standards
NBS COLLABORATIVE REFERENCE PROGRAMS

TAPPI Paper and Board (6 times per year)

Bursting strength

Tearing strength

Tensile breaking strength

Elongation to break

Tensile energy absorption

Folding endurance

Stiffness

Air resistance

Grammage

FKBG-API Containerboard (48

Mullen burst of linerboard

Concora test of medium

Smoothness

Surface pick strength

K & N ink absorption

PH

Opacity

Blue reflectance (brightness)

Specular gloss, 75°

Thickness

Concora (flat crush)

Ring crush

times per year)

MCCA Color and Appearance (4 times per year)

Gloss at 60°

Color and color difference

Retroref lectivity

Rubber (4 times per year)

Tensile strength, ultimate elongation and tensile stress

Hardness

Mooney viscosity

Vulcanization properties

ASTM Textiles (3 times per year)

Flammability (FF3-71 and FF5-74)

ASTM Cement (2 times per year)

Chemical (11 chemical components)

Physical (8 characteristics)

AASHTO Bituminous

Asphalt cement (2 times per year)

Cutbacks (once a year)

Collaborative Reference Programs

B360 Polymer Building

National Bureau of Standards

Washington, D.C. 20234

lev

saafl
MANUFACTURERS COUNCIL ON

COLOR AND APPEARANCE

COLLABORATIVE REFERENCE PROGRAM

FOR

COLOR AND APPEARANCE

COLOR AND COLOR DIFFERENCE

J. Horlick

Standards Application and Analysis Division

Institute for Applied Technology

J. Stevenson

CTS-NBS Research Associate

U. S. DEPARTMENT OF COMMERCE

National Bureau of Standards

INTRODUCTION

This Collaborative Reference Program is sponsored by the Manufacturers

Council on Color and Appearance and the National Bureua of Standards.

Four times per year, color chip samples are distributed to each participating laboratory. After the data has been returned to and

analyzed by NBS, a report (as illustrated by this report) showing

the data from all participants is prepared.

NBS and NRC (National Research Council of Canada) are currently

developing methods for absolute reflectance determinations. As an interim step, this report gives tentative values which are a composite

based on the results reported by NBS and NRC. These tentative values

may be used as guides to detect serious errors in testing. CAUTION : These values are based on results from G. E. Spectrophotometers

relative to the present state of the art for absolute reflectance

measurements, and are not necessarily applicable to all instruments

and standards.

Reflectance values for 40 wavelengths using a 45/0 geometry

instrument and colorimetric data have been provided by NBS.

If there are any questions on the notes, the analyses, or the reports

in general, contact J. Stevenson or J. Horlick on 301-921-2946.

March 20, 1978
TABLE OF CONTENTS

Introduction

Table of Contents

Explanation of WHITE Sample Data

aE Calculations

Notes on Specific Laboratory Results

Key to Tables

Analysis of laboratories in

data, samples C75-C76

Analysis of laboratories in

data, samples C77-C78

Analysis of laboratories in

data, samples C75-C76

Analysis of laboratories in

data, samples C77-C78

Ratios of laboratories in X sample

Ratios of laboratories in L (results according to value

Analysis of laboratories in

samples C75-C76

Analysis of laboratories in

samples C77-C78

Analysis of laboratories in

samples C75-C76

Analysis of laboratories in

samples C77-C78

Reflectance at 32 wavelenth

C75 , C76 , C77 , C78, W10

Spectrophotometric curves o and W10

X, Y, Z space, normal

X, Y, Z space, normal

L, a, b space, normal

L, a, b space, normal

Y, Z space, WHITE

a, b space, WHITE sample

converted to X, Y, Z space)

X, Y, Z space, adjusted data,

X, Y, Z space, adjusted data,

L, a, b space, adjusted data,

L, a, b space, adjusted data,

, 45/0 Reflectance factor,

samples C75, C76, C77, C78,
EXPLANATION OF DATA FOR WHITE SAMPLE

Specimens of a white sample were distributed to the participants along

with the usual two pairs of colored specimens, and each participant was asked to return measurement data for the white specimen, reporting re- sults in the same manner as for the colored specimens.

As a first step, three laboratories were selected to serve as "reference"

laboratories for the purposes of this analysis and the average of their

X, Y, Z values for the white sample were computed. Next, the ratios of

the participants data to the combined reference laboratory values were

calculated for each participant (transformed to X, Y, Z space if necessary).

These ratios are shown in the White Sample Analysis tables.

Two observations can be made about the data in the White Sample Analysis

tables. First, the participants as a whole tend to be high compared with the

combined average values obtained by the selected reference laboratories.

Second, a few participants had noticeably extreme values for one or more

of the components and these participants especially should look to the cause.

Next, the ratios in the White Sample Analysis tables were used to "adjust"

the data of the normal data tables to obtain the adjusted data table values.

The adjustment consisted of dividing the X, Y, Z values of the normal data

tables by the respective ratios in the White Sample Analysis tables.

The significant change in the adjusted data tables is in the SD OF MEANS.

Comparison of these among-laboratory standard deviations with those in

the normal data tables, shows considerable reduction for X, Y, Z. Thus

part, at least, of the disagreement among participants is due to errors in

standardization that could be corrected through use of an agreed-upon white

standard. There is no similar significant change for AX, aY, and aZ.
aE Calculation

aE is calculated in the Color and Color Difference Collaborative

Reference Program by the FMC2* equations as follows:

The yellow-blue chromatic difference is

AC-, = K

] S(PAP + QAQ)/bD

2

- K, AS/b;

the lightness difference is

AL = 0.279K

2 (PaP + QAQ)/aD;

and the red-green chromatic difference is

AC

3 = K^QaP - PAQ)/aD.

The quantity, D, is an abbreviation,

D = (P

2 + Q2 )^.

K-| = 0.55669 + 0.049434 Y - 0. 82575 • 1 0" 3

Y

2 +

0. 791 72 * 1 0” 5 Y

3

- 0. 30087- 1 0” 7 Y 4

,

K

2 = 0.17548 + 0.027556 Y - 0 . 57262 • 1 0“ 3

Y

2 +

0.63893- 1 0~ 5Y

3

- 0.26731 • 1

_7

Y 4

,

a

2

= 17.3-1

-6

(P

2 + Q

2 )/[ 1 + 2.73P 2 Q

2 /(P 4 + Q4

)],

b

2 = 3.098' 10

-4

(S

2 + 0.2015 Y 2

)

P = 0.724 X + 0.382 Y - 0.098 Z,

Q

= -0.48 X + 1.37 Y + 0.1276 Z,

S = 0.686 Z,

AE = [

( AC i

) 2 + ( AL ) 2 + (aC

3

) 2 P

*Friel e-Mac Adam- Chickering metric

IV
Notes on Specific Laboratory Results

C241

C262

,

C479A

C479B

C499B

C514B

C51

C524

C538

C541

C262,

- Apparent measurement or reporting error on samples C79-C80,

a-value.

C325 - Apparent measurement or reporting error on all samples,

L-value, and on samples C81-C82, a-value.

- Apparent measurement or reporting error on all samples,

Z-val ue

- Apparent measurement or reporting error on samples C79-C80,

X-value.

- Apparent measurement or reporting error on samples C79-C80,

b-val ue.

- Apparent measurement or reporting error on samples C81-C82,

a, b-values.

- Apparent measurement or reporting error on samples C79-C80,

Z-value.

- Apparent measurement or reporting error on samples C79-C80,

Y-value.

- Apparent measurement or reporting error on all samples.

- Apparent measurement or reporting error on all samples,

a-value.

C325, C495, C519 - All have some problem regarding measurement

of the white sample, and should check their measurement

process regarding this.

v

KEY TO TABLES

MEAN The average of individual test determinations.

GRAND MEAN - (GR. MEAN)The average of the individual laboratory MEANS,

excluding laboratories flagged (see column F)

with an X, #, or +.

SD OF MEANS - The standard deviation of the laboratory MEANS

about the GRAND MEAN: an index of the among1 aborato ry precision.

INST CODE - Code for instrument type and color space used

to report measurements, see first table.

F

-#

- Flag, is based on aE Column with following meaning:

Excluded because data were not understood; because

of a non-coded variation reported by the laboratory

or data received late.

M

- X

- Excluded because data for one sample are missing

Excluded from all calculations because AE is beyond

(3) standard deviation units.

* _ Included in grand means but results are between

two and three standard deviation units. The

0 -

participant should take this as a warning to

reexamine his testing procedure.

Included in grand mean analysis.

Note: In addition to flag (F) based on delta E column it is also possible

to have either a X or an * on individual MEANS as follows:

X - following a MEAN signifies that the mean is greater than 3 SO of

MEANS from the GRAND MEAN. The values for this laboratory have

been omitted in the calculations involving the MEAN for the

col umn.

* - following any of the MEANS signifies that that quantity is greater

than 2 but less than 3 of the appropriate standard deviations from

the corresponding average. The participant should take this as a warning to reexamine his testing procedures.

AE - Total color difference between two samples. In X, Y, Z analysis it is

calculated in MacAdams (FMC II) units. For L, a, b analysis it is

calculated in Hunter units.

1
ANALYSIS C70-1 TABLE 1 COLOR A COLOR DIFFERENCE

INSTRUMENT I DENT TFICATION

INST COLOR DATA

CADE INSTRUMENT SPACE CODE

C70BA EECKMAN AUTe-PRfl 54 X Y Z 901 4 C70BB EECKMAN DE-G X Y z 901 4 C70BL E *L 505 SPECTROPHOTOMETER X Y z 9014

C70CA CARY 14 X Y z 901 4 C70CD COLOR EYE SMALL SPHERE X Y z 901 4 C70CE COLOR EYE SMALL SPHERE XX ' TZ.4V 901 6 C70CF COLOR EYE SMALL SPHERE XYZ ,BaS04 9017

C7 0CG COLOR EYE SMALL SPHERE XX 1 YZ.Ba 901 8 C70CH CeLeR EYE SMALL SPHERE XYZ ,3V 901 1 C70CL COLOR EYE LARGE SPHERE XX 1 YZ.4

901 6 C7 0CM COLOR EYE LARGE SPHERE XX • YZ, Ba 901 8 C70CN C0LCR EYE LARGE SPHFRE XYZ ,BaS04 901 7 C7 0DC DlANe C BR© M A SCAN X Y Z 901 4 C7 0DK EIANe/LSCE AUTOMATE XYZ , B aS 04 901 7 C70DL DIANC/LSCE AUTOMATE XYZ .3V.4F 901 9 C70DM D I A N €/ L S C E AUTOMATE XX 1 YZ ,4V 9016

C70DT EIANe/SSCE AUTOMATE XYZ , BaS©4 901 7 C7 0GA GARDNER AUTO. COLOR DIFF. METER. AC-2A L a b 901 3 C7 0GB GARDNER AUTO. COLOR DIFF. METER. AC- 2 A X Y Z 901 4 C70GC GARDNER XL-23 X Y Z 901 4 C7 0GD GARDNER XL-23 L a b 901 3 C70GE El ANG/HAREY/GE SPECTRO PHOTO MET E

X Y Z 901 4 C^OGG GARDNER XL-30 X Y z 901 4 C70GK GARDNER XL-70 X Y z 901 4 C7 0GL GARDNER XL-70 L a b 901 3 C7 0CM GARDNER MULTIPURPOSE REFLECT© METER X Y Z 901 4 C70GP GARDNER XL-200 L a b 901 3 C70GX GARDNER XL-10 L a b 901 3 C7 0GY GARDNER XL-10 X Y Z 9014

C70HA BUNTEH D2SA ( D A, D 1 A . D2 A

)

L a b 901 3 C70HB BUNTER D25 A ( D A , D 1 A , D2 A ) X Y Z 901 4 C70HM HUNTER D25M (DM.D1M.D2M) L a b 901 3 C70HN BUNTER D25M (EM.D1M.D2M) X Y Z 901 4 C7 0HP BUNTER D2SP (DP.D1P,D2P> X Y Z 901 4 C70H0 BUNTER D25P (DP.C1P.D2P) L a b 901 3 C^OHR HUNTER D25 A (EA.D1A.D2A) Rrf a b 901 2 C7 OKC KCS-10 XX 1 YZ ,4V 901 6 C70KD KCS-18 XX i YZ , B a 901 8 C7 0KS KCS-1

X Y Z 901 4 C70KT KCS-40 X Y Z 901 4 C70LS LERES Tk I LAC X Y Z 901 4 COLT LERES TRILAC XYZ ,3V 901 1 C70MC MECCC COLORMASTFR V R G B 901 5 C7 0MS MARTIN SWEETS X Y Z 901 4 C7 0MT MARTIN SWF E T

X \

i YZ , B a 901 8 C70ND NEGTEC 220 DU COLOR R G R 901 5 C7 ONE NEOTEC 220 DU COLOR X Y Z 901 4 C7 0PM FHOTOVOLT MODEL 501A R G B 901 5 C7 0PV F HOT CVGLT MODEL 610 X Y Z 901 4 C7 0SA SPECIAL INSTRUMENT X Y Z 901 4 C70SB SPECIAL INSTRUMENT Rd a b 901 2 C70SC SPECIAL INSTRUMENT L a b 901 3 C7 0SL SPECIAL INSTRUMENT R G B 9015

C70ZD ZEISS DMC25 X Y Z 90 14 C7 0ZE ZEISS ELREPHO X Y Z 901 4 C70ZF ZEISS ELREPHO R G B 901 5 C7 0XX GIVE INSTRUMENT MAKE MODEL . NOT SPECIFIED 9020

FORMAT OF COLOHMETRIC (INPUT) DATA

DATA CODE COLOR SCALE

901 1 X.Y.Z 3 FUNCTION VITROLITE CORRECTION

9012 Rd, a,

901 3 L.a.b HUNTER

9014 X.Y.Z

901 5 k, G, B 9016 X.X'.Y.Z 4 FUNCTION VITROLITF CORRECTION

9017 X.Y.Z. Ba S04 CORRECTION

9018 X.X'.Y.Z Ba S04 CORRECTION

9019 X.Y.Z 4 FUNCTION VITROLITE CORRECTION

9020 ( NCN-STD . INST. SCALE SPECIFIED WITH DATA)

2
REP0RT N0. 22 MCCA CflLLABCKATI VE REFERENCE PROGRAM

X, Y, Z SPACE ANALYSIS, NORMAL DATA ceLOR C01CR difference

LAB SAMPLE C79 SAMPLE C80 DIFFERENCE CeO - C79

CODE F MEAN X MEAN Y MEAN Z MEAN X MEAN Y MEAN Z AX AY AZ AE

Cl 22 0 48.50 44. 1 0 16 . eo 48.00 43.35 16.55 - .50 -.75 • 15 2.49

Cl 62 O A 5 . A £ 44.73 1 7.55 45 .23 44.17 17.83 -.22 -. 56 .24 2.76

C20 0 0 48.77 43.52 17.66 48 .41 43.24 17.52 -.36 -.68 • 26 2.86

C2 A A O 48.26 42.30 1 £ . 54X 47.92 41.60 16.24* -.34 -.70 .30 3.30 C250 0 45.23 44.30 17.12 45.00 43.60 17.48 -.33 -.70 .35 • 3.19

C251 X 48. 46 42.60 16.65 48.28 42.20 17.01 -.16 -.40 * .36 • 2 . 0 7X C31 A 0 Ae.66 44.20 ie. 16 * 4e.24 4 3.35 18. 22 -.42 -.81 .06 3.43*

CA 07 0 49.10 43 .eA 17.15 40.70 43.16 17.43 -.40 -.68 • 24 2.69 CA12A e 48.23 43.29 17.50 46 .08 42.74 17.76 -.25 -.55 .27 2.65

CA 1 2B 0 A 8 • 1 0 43.1 0 17.37 47.84 42.53 1 7 • 6 3 -.26 -.57 .26 2.68

CA 1 A X 45.75 45.12 10.12 45.35 44.21 18.26 -.37 -.91 • 14 4. SOX

CA 16A 0 48.74 43.36 17.19 Ae. 36 42. 66 17.38 -.38 -.70 .19 2.95

C A 1 6 B 0 46.72 43.55 1 7.25 40.35 42.90 17.45 -.36 -.69 .15 2.91

CA 1 7 B 0 A e . A 5 42.es 16.79 48.14 42.21 16.55 -.31 -.63 .16 2.94

CA 1 8 0 45.24 44 .54 1 8.C7 48.94 4 4. 30 18.25 -.25 -.64 .18 2.94

CA2 2 0 47.48 42.07 16.77 47.02 41 .27 16.90 - .46 -.81 .13 3.32

CA2 3 0 50.32* 44.76 18.22* 45.80* 43.56 18.42* -.52 -.81 .20 2.62 CA28 0 45.23 43 .73 17.21 48.

7 43.17 17.45 -.26 -.57 .28 2.67 CA37 X Ae.66 44.£5 16.10 48 .48 43.86 18.25 -.17 -.69 .15 4. 1 IX CA A 3 0 A9. 18 43.72 17.03 48.68 42.56 17.17 - .45 -.76 • 14 2.73

CA4 4 0 48.6 1 43.67 17.30 48.10 42.84 17.43 -.50 -.83 . 1 3 3. 11 CA A 5 0 45.15 44 .Cl 18.20* Ae.77 43.27 1 6.37* -.41 -.74 . 1 7 2.94 C446A 0 48.03 42 .81 17.22 47.57 42.05 17.34 -.46 -.77 .12 2.96

CA A 6 B 0 4e .40 43 .2e 17.29 47.87 42.46 17.42 -.52 -.82 • 1 3 2.94

CA £ 1 O 48.71 43 . eo 17.56 48.12 4 2.52 17.70 -.59 -.89 . 14 2.99

CA55 0 47.57 42. £5 16.e5 a 7 . 05 41 .73 16.58 -.52 -.81 .09 2.94

CA 6 0 0 Ae.£6 43 .54 17.20 A8.05 42.74 17.37 -.51 -.81 .17 2.87 CA63 0 48.61 43.58 17.23 48.28 4 2. 73 17.35 -.53 - • 85 • 12 3.13

CA 6 7A 0 48.31 43.22 17. 18 47.58 42.62 17.45 - • 33 -.61 .27 2.54 C467B 0 46.66 43.10 1 6 .55 48.62 42.51 17.15 -.24 -.59 . 24 3.0 2-

CA 6 9 0 48.71 43.88 17.22 48.32 43.17 17.36 -.39 -.71 • 14 2.90

CA 7 0 0 45.23 AA . 1 4 18.05 45.03 43.65 1 e.39* -.20 -.49 • 34 2.44

CA 7 2 0 4e.62 43.73 17.68 48.46 43.04 17.86 -.36 -.70 .18 3.00

CA 7 3 0 48.06 42.71 17.13 47.64 42.00 17.33 - .43 -.72 .20 2.81

C A 7 A 0 48.40 43.26 17.21 48. 1 3 42 . 67 17.45 -.27 -.58 .24 2.7£

CA 7 6 0 48. A A 43.21 17.51 48. 14 42.58 17.73 -.30 -.63 • 22 2.88

C4 7 50 48.50 43.15 25 .COX 48.35 42.70 25. SOX -.15 * -.45 • .30 2.45

C4 7 9B X 45 .27 4 A . CA 1 8 .C5 45.90* 43.48 18.06 .63 X -.56 • 01 « 9 . 45X CAS 0 0 47.53 42 . 08 13.50X 47.10 41.36 1 3.63X -.42 -.72 • 13 2.91

CA 81 e 49.26 44.40 17.64 48.50 43 . 64 17.86 - .36 -.76 .22 3. 44*

CA95 0 £5.1 ax 45.1 5X 15.e2X £4. 72X 48 . 35

20. 13X -.46 -.80 .31 2.93 CA96A 0 48.33 43.26 17.21 48.05 42.67 17.45 -.27 -.59 . 24 2.76

C50 3 0 A8.03 42.58 17. C3 47.70 42.30 17.20 -.38 -.68 .17 2.00

C50 8 e 46.17 43 .09 17.15 47.50 42.13 17.20 - .68 • -.57 • • 01 * 3.14

C51 1 o 45.04 44 . C17.88 46.66 43.43 1 e .1 8 -.30 -.66 .30 2.55

C£1 6 0 48.93 44.43 17.20 48 . 65 43.83 17.39 -.24 -. 60 .19 2.95

C519 0 46.71* 42.13 15 .e3X 46.39* 41 .46 16 . Cl X -.32 -.67 .13 3.13

C5 2 1

0 A5.C1 43 .69 17.36 48.66 43.03 17.54 -.35 -.67 . I 7 2 .ee C521 B 0 50.12* A4.££ 1 7.32 45.54 43.65 17.61 -.58 -.89 . 30 3.17

C £ 2 2 X 47. £7 42.35 16. C 7 * 47.39 41.74 16.30* -.18 -.65 .23 3.54X

C52 A 0 46.52* 40.75X 16.79 46.44* 40 .OOX 16.58 -.48 -.74 . 19 2.90

C52 6 0 48.31 43.71 17.32 47.56 43.04 17.56 - . 35 -.67 .23 2.84

C528 0 47.66 42 .53 17.17 47.28 41.83 17.31 -.38 -.70 .13 2.95

C531 0 46.60 44 .CO 1 7.48 48.51 43.41 17.75 -.29 -.59 .27 2.61 C532 0 4e.£2 43.63 1 7 . 7 0 48.15 43.02 17.57 -.33 -.61 .27 2.52

C53 A 0 48.47 43.80 16.64 48.16 43.1 7 16 *e2 -.31 -.63 • 16 2.80

C536 0 40.13 43.C0 17.15 47.86 42.43 17.38 -.27 -.57 • 23 2.61 C537 0 5C.25* 45.62* 17.14 49.75* 45.08* 17.35 - .46 -.75 • 21 2.62 C5A0 0 Ae.46 43 .33 17.70 46.18 42.75 17.53 -.28 -.59 • 23 2.65

C£ A 5 0 47.53 42 .e2 16.62 47.£4 42.11 17.02 -.39 -.71 • 21 2.97

C5 A 8 0 47. 9£ 41 .60* 1 6. eo 47.50 40.50* 17.00 -.45 -.70 .20 2.67

C5A5 0 46 .26X 41.41* 16.23* 46.13* 41 .00* 16.62 -.13 <r -.41 • . 39 • 2.48

C5 52 0 48.20 42.74 16.52 47.83 42.11 17.17 -.36 -.63 .25 2.56

GRAND MEANS

48.57 43.46 17.29 48.16 42.77 17.47 -.38 -.69 • 21 2.86

SD 0F MEANS

.69 .83 .41 .75 .82 .45 • 1 1 .11 .07 • 24 INCLUDED LABS F€R

£6 THIS MEAN56 £3 57 56 54 58 58 58

Tentative values: C79 C80 (absolute reflectance) X=48.12 X=47.68

Y=43. 09 Y=42. 34 Z=1 7. 26 Z= 17.41 3

1977-1578

INST CODE LAB

70SA C 1 22 70DC C 1 6

70GE C200

70SA C2A4

70ZF C250

7 07. E C251

70CE C314

70SA CA 07

7 OGE C A 1 2

7 OGE CA12B

70S A C A 1 A 7 0 S A C A 1 6 A 70SA C A 1 6 B 70HN C A 1 7 B 7 OCE CA18

7 0 SA C 42 2 70GE C A 2 3 7 OH P CA28

70CE C A 3

70CN C4<*2 70GE C A A A 70LS C A A £ 70GE C A 4 6

70CA C*+4 6 B 70GE CA51 70GE CA 55

7 OGE C A 6 0 7 0Z E C463

70GE CA67A

70 H E C4fc7B

7 OGE C A 6

70GE C A 7

70ZD C 47 2

7 OGE C A 7 2 70GE C A 7

70S A CA 76

7 0S A C4 7 9A 70S A C475E

70 h B C A 8 0 70 RS C A 8 1 70KS Ca95

70GE CA 56

7 OGE C503

70GE C5 0 6 70 BA C511

70RT C 51

70 E S C515

70CA C521A

7 OSA C521B

7 0 S A C5 2 2

7 OS A C52

70 k S C52 6 70SA C52e

7 OGE C 5 3

70 S A C 5 3 2

70GE C £ 3

70 K S C536

70DM C£ 3 7 7 0GE C5 4 0 7 OS A C5 A 5

7 OS A C5Ae

7 OGE C5A

70 HN C552
REPORT NO. 22 MCCA COLLABORATIVE REFERENCE PROGRAM

X, Y, Z SPACE ANALYSIS, NORMAL DATA COLOR CeLOR DIFFERENCE

LAB SAMPLE C81 SAMPLE C82 CODE F MEAN X MEAN Y MEAN Z MEAN X MEAN Y MEAN Z

Cl 2 2 X 9.20 12.30 12.20 8.60 11.60 12.70

Cl 62 0 5.63 12.65 13.86 5.14 12.00 13.22 C20 0 0 5.45 12.46 13.73 8.96 11.79 13.29

C24 4 0 e.76 1 1 .77 12.93 8.16* 11.15 12.19 C250 0 5.25 12.50 13.70 8.88 11.90 13.35

C251 0 9.24 12.20 12.1 1 e.87 11.60 12.75

C31 4 0 10.06 12.94 14.37 5.56 12.22 13.80

C4 0 7 0 5.64 12 .EO 13.41 5.33 12.06 13.17

C41 2A 0 5 • E 3 12. E2 13.57 5.09 11.56 13.12

C4 1 2 B 0 5.48 12.46 12.48 5.05 1 1.90 1 3.05

C4 1 4 0 10.00 12.52 14.32 5.53 12.31 13.78

C41 6A 0 5.32 12.36 13.34 8 .92 11.80 12.92

C41 6B 0 5.37 12.38 12.41 8. e3 1 1.70 12.83

C41 7B 0 5 • C 7 12.02 12.75 8.59 1 1 .42 12.26

C41 8 0 5.83 12.55 14.25 5.31 12.29 13.68

C42 2 0 5.04 1 1 .88 12.45 8.61 1 1 .33 12.08

C42 3 0 5 .54 13.06 14. C5 5.47 12.47 13.54

C42 8 0 5.24 12.20 13.05 e.70 11.52 12.47 C437 0 5.5E 12.81 14.67* 5.39 12.17 14.12*

C44 3 0 5 . E 4 12.42 12.48 5.03 11.82 12.59 C444 0 5.25 12.25 13.54 8.83 1 1 .66 13.07 C445 0 5.8E 12.86 14.18 5.32 12.21 13.62 C446A 0 5 .46 1 2 .43 13.34 8.96 11.80 12.81 C446B 0 9. El 1 2 .49 12. E8 5. 05 1 1 .90 13.02 C45 1 0 5.32 12.25 12.46 8.81 11.63 12.87

C4 59 0 9.25 12.14 12.23 8.72 11 .49 12.66

C4 6 0 0 9.31 12.28 12.45 8.83 11.66 12.93 C463 0 5.44 12.44 12.61 8.90 1 1 .77 13.01

C4 6 7A 0 9.04 12.00 13.18 8.65 11.49 12.78 C467B 0 5.17 12.23 12.85 8.75 11.67 12.47

C4 69 0 8.54 11.90 13.34 8.40 11.23 12.76 C470 0 5.57 12 .5e 14.3? 5.50 1 2.37 13.82 C472 0 5.88 12.87 14.20 5.32 12.20 13.71 C473 0 9.36 12.39 13.30 8.88 11.77 12.80 C474 0 5.43 12.40 12.24 8.59 11.85 12.92

C4 7 6 0 9 .65 12.61 12.86 5.28 12.10 13.51 C479A 0 5 .20 12 .CO 21 • 7 5X e.90 11.50 21 . 50X C479B 0 5.85 12.84 14.12 5.51 12.40 13.63 C480 0 e.90 1 1 .80 12.70 e.4i 11.19 12.17

C48

0 5.80 12.70 14.27 5.20 12.04 13.70

C455 0 1 1 • 0 7 X 14. 39X 15.53X 1 0. 40X 1 2.S9X 15.21X C496A 0 9.23 12.21 12.23 8.80 11.66 12.90

C503 0 5.26 12.16 12.26 8.72 11.50 12.66 C50Q 0 5.24 12 .21 12.24 8.75 1 1 .58 12.71

C51 1 0 5.71 12.77 14.03 5.17 12.09 13.46

C51 6 0 5.13 1 1 .89. 12. 36 e.69 11.33 12.50

C51 9 0 5. 30 12.63 12.62 8.93 12.11 12.25 C521A 0 5 .se 12.61 12.53 5.14 12.00 13.00 C521B 0 5. El 1 2.62 12.78 5.22 12.30 13.51 C52 2 0 8.92 12.29 12.62 8.51 11 .71 12.16 C524 0 9.55 12.61 12.75 5.12 12.07 12.34 C526 0 5.61 12.38 13.55 5.11 1 1 .76 13.41 C52 8 0 5.3e 12 .26 13.39 8.50 11.66 12.87 C53

0 .5.63 12. EE 14 .ce 5.35 12.14 13.83 . C532 0 5.40 12 .36 13. E2 e.54 11.79 13.05

C534 0 e.83 1 1 • 50 « 12.55 e.36 1 0.90* 12.42 C536 0 5 .46 12.42 13.57 5.04 11.87 13.13

C53 7 0 10.27* 13.45* 13. E3 5.eo* 12.83* 12.02 C54 0 0 5.92 12.91 12.52 5.58 12.42 13.60 CE45 0 5.05 12.00 13.03 e.56 1 1.38 12. E2 C54 8 0 9.05 12.05 12.50 8.50 11.40 12. CO CE4 9 0 8 .’ 5 6 * 1 1 .40* 12.65 e.os* 10.76* 12.09 C552 0 5.21 12.1 5 12.78 8.69 11 .El 12.23

GRAND MEANS

9.43 12.40 13.48 e.S6 li. ei 12.59 SD 0F MEANS

.35 .39 .53 .36 .40 .53 INCLUDED LABS F0R THIS MEAN

61 61 . 60 «1 61 60

Tentative values: C81 (absolute reflectance) X= 9.40

Y=1 2. 34

C82

X- 8.88

Y=ll .69 4

Z=1 3. 43 2=12.92

DIFFERENCE C82

AX AY

-.60 -.70

-.50 -.65

-.53 -.67

-.60 -.63

- .37 -.60 -.37 -.60

-.50 -.61

-.31 4 -.43

- .43 -.56

-.43 -.56

- .48 -.61

-.41 -.56 -.54 -.68 -.48 -.61 -.52 -.70

-.43 -.55 -.47 -.60 -.54 -.68

-.56 -.64

- • 50 -.60 -.45 -.59

-.52 -.64 -.50 -.63 -.46 -.59

-.51 -.65

-.53 -.65 -.49 -.62 -.55 -.67

-.40 -.52

-.42 -.56

-.54 -.67

-.47 -.61 -.56 -.67 -.48 -.61

- .44 -.55 -.38 -.50

-.30 * -.50

-.38 — • 4 S -.49 -.61 -.50 -.66

-.67 • -.80 -.43 -.55

- . 54 -.68

-.50 -.63

- .54 -.68

-.44 -.56 -.37 -.51

- . 44 -.61 -.29 * -. 32 -.42 -.58

C8 1 AZ AE

-.50 3 • 4 IX -.54 2.36

-.44 2.84

-.74 * 3.194 -.35 2.32 -.36 2.40

-.57 2.23 -.25 4 1.71 -.45 2.11 -.43 2.12

-.54 2.18 -.42 2.09

-.58 2.60

-.49 2.39

-.57 2.49

-.41 2.17

-.51 2.17

-.58 2.66

-.55 2.61 -.49 2.55

- . 47 2.27

-.56 2.4e

-.53 2.39

-.55 2.10

-.59 2.42

-.57 2.63

-.52 2.36

-.59 2.61 -.40 2.01 -.42 2.14

-.58 2.73

-.50 2.22

-.59 2.67

-.50 2.34

-.42 2.22

-.35 1.92 -.25 4 2. 30 -.49 1 .66* -.53 2.42

-.57 2.37

-.72 4 2.97* -.43 2.16 -.58 2.63

-.52 2.42

-.57 2 .se -.46 2.20 -.37 1 .86 -.53 2.13

-.27 4 1 . 6C* -.44 2.1 2

.43 -.54 -.41 2 .oe

.50 -.62 -.54 2.35

.40 -.61 -.51 2.31

.27 * -.41 * -. 25 * l .se

.45 -.58 -.47 2.23

.47 -.61 -.53 2.33

.42 -.55 -.44 2.05

• 47 -.63 -.51 2.12

.35 -.49 -.32 1 .81

. 49 -.62 -.52 2.44

.55 -.65 -.50 2.94

.51 -.64 -.56 2.60

.52 -.64 -.55 2.E2

• 4"* -.60 - .49 2.22

.08 . 07 .10 .32

62 61 62 i

1977-1578

INST CODE LAE

70SA Cl 22

7 0 DC C 1 62 70GE C200

70S A C244

70ZF C25

70ZE C251

70CF C314

70 S A C407

70GE C412A

70GE C412B

70SA C414

70SA C416A

70S A C416B

70 HN C4

7 E 70CE C41

70S A C422

7 OGE C422

70BB C42e

70CE C4 3

7 OCN C 4 4

7 OGE C 4 4 4 7 01 S C44

70GE C446A

70CA C446B

70GE C451

70GE C455

70GE C460

7 OZE C463

7 OGE C467A

70HB C467B

70GE CAo5

70GF C470

70ZD C472

70GE C473

70GE C474

70S A C476

70S A C475

70SA C475B

70 H B C4 8 0 7 0 KS C481

7 OKS C455

7 OGE C496A

7 OGE CE 0

70GE C 50

70E A CE 1

70 K T CE 1

70 I S C515

70CA C521A

70SA C521B

70SA C522

70S A CE2

7 0 KS C526

70SA C528

70GE CE31

70SA CE32

70GE CS34

70KS CE36

70DM C 5 3

70GE CE40

70 SA CE4S

70S A CE4e

7 OGE CE4 5 70 HN C552
REPORT N0. 22 MCCA COLLABORATIVE REFERENCE PROGRAM

L. a, b SPACE ANALYSIS, NORMAL DATA COLOR COLOR DIFFERENCE

LAB SAMPLE C79 SAMPLE C0O DIFFERENCE C80 - C7<

CODE F MEAN L MEAN A MEAN B MEAN L MEAN A MEAN B AL AA AB AE

Cl 05 0 65.55 17.00 30.40 65.00 1 8. 00 29.70 -.55 1 . 00 -.70 1 .34

Cl 21 A 0 65.1 0 17.80 29.80 64.70 18.70 29.10 -.40 .90 -.70 1 .21

Cl 4 8 O 6 5.70 17.20 30.20 65.25 1 8.00 29.50 -.45 . 80 -.70 1.15

Cl SO 0 65.67 17.40 30.50 65.08 1 8. 39 29.82 -.59 1 . 00 -.68 1 .34

Cl 52 0 66.30 16.70 30.50 65.80 17.60 29.80 -.50 .90 -.70 1 .24

C21 3 0 65. CO 17.20 29.50* 64.50 18.00 28.60* -.50 . 80 -.90 X 1 . 30 C241 0 66.55 2 2 . 1 OX 30.15 65.90 23. 10X 29.95 -.65 1 . 00 -.20 X 1 .21 C253 O 65.78 17.77 30.38 65.16 18.80 29.72 -.62 1 . 03 -.67 l . 3e C256 O 65.59 17.33 30.24 65.08 18.30 29.58 -.51 .97 -.65 1.27

C2 59 fl 65.75 17.45 30.10 65.15 18.40 29.40 -.60 .95 -.70 1 . 72 C262 0 42.99X 17.27 30.89 42.32X 18.24 30.30 -.67 .97 -.59 1 .32 C285 0 66.60 15.00 30.50 66.10 1 6.00 29.90 - .50 1 . 00 -.60 1 .27 C28 8 0 6 6.30 16.70 30.50 65.90 17.75 29.90 -.40 1 .05 -.60 1 .27 C29 1 0 65.75 16.90 30.20 65.25 17.85 29.55 -.50 .95 -.65 1 .25

C31 7 0 65.30 17.80 29.70 64.70 18.70 29.00 -.60 .90 -.70 1 .29

C32 5 0 42.1 OX 17.45 30.30 41 .5 OX 18.45 29.70 -.60 1 • 00 -.60 1 .31 C352 0 65.90 16.25 -3 0.50 65.45 1 7.20 29.90 -.45 .95 -.60 1 .21 C356 0 65.50 17.30 30.20 64.90 18.20 29.50 -.60 . 90 -.70 1 . 29 C382 0 65.70 16.30 30.25 65.15 17.30 29.60 -.55 1 . 00 -.65 1 .31 C41 7A o 65.3 1 16.65 3C.C8 64.68 17.80 2 9.40 -.63 .95 -.68 1 .32

C42 0 0 65.70 19.50 30.60 65.25 20.40 29.90 -.45 .90 -.70 1.23

C42 4 0 66.03 16.22 30.11 65.45 17.22 29.42 -.57 1 . 01 -.63 1 . 35 C440 0 65. e7 18. C6 3C.64 65.39 19.02 30.20 - .40 .96 -.64 1 • 2 S C442 0 65.70 16. eo 30.40 65.20 17.70 29.70 -.50 .90 -.70 1 .24 C45 4 0 64 .e2 16.18 29.48* 64.24 19.23 20.80* -.58 1 . 05 -.68 1 .78 C456 o 65.99 17.06 30.55 65.57 1 7.97 29.91 -.42 .91 -.65 1 .19 C458 0 65.63 17.35 30.11 65.10 18.29 29.44 -.52 .94 -.66 1 .27 C475 0 65.39 19.18 29.93 64.75 20.16 29.22 -.63 . 98 -.70 1 . 36 C477 0 65.42 l e.26 29.96 64.90 19.27 29.34 -.52 1 . 00 -.62 1 .29 C483 0 64.77 20.51* 29.78 64.27 21 .29* 29.1® -.50 • 79 -.58 1.10*

C49 4 0 66.20 17.30 30.20 €5.70 16.05 29.60 -.50 .75 * -.60 1.08*

C49 8 0 65.35 16.50 30.60 64.80 17.50 30.00 -.55 1 . 00 - .60 1 .29

C49 9A 0 65.80 17.40 30.30 65.25 18.25 29.60 -.55 . 85 -.70 1 .23 C499B X 65.00 20.50* 25.60X 65.10 21 .30* 25. OOX . 1 0 X . 80 -.60 1 .OOX C506 0 65.95 17.53 30.30 65.50 18.40 29.70 -.45 .90 -.60 1 .17

C51 4A 0 65.40 20.80* 30.03 64.88 21.74* 29.33 -.52 .94 -.70 1 .29

C51 4 B 0 66.00 19.70 30.30 65.60 20.60 29.70 -.40 .90 -.60 1.15

C53 8 0 67.3SX 16.30 31.10* 66.80X 17.20 30.40* -.55 .90 -.70 1.27

C541 0 66.50 9 . 4 0 X 30.40 66.05 10.20X 29.65 -.45 . 80 -.75 1.19 C54 3 0 66.45 1 5 .40 30.40 65.90 16.50 29.60 - • 55 1.10 * -.80 * \ .47* C54 4 0 65.70 17.80 30.10 65.10 1 8.70 29.45 -.60 .90 -.65 1 . 26 C546A 0 64.65 1 8.40 29.90 64.10 19.40 29.20 -.55 1 . 00 -.*'0 1 .34 C546B 0 64.80 17 .40 30.00 64.10 18.25 29.30 -.70 » . 85 -.70 1 . 30 C54 7 0 64.99 17.75 30.13 64.45 18.70 29.47 -.54 .95 . -.66 1.20 C550 0 65.60 16.10 30.45 65.25 16.95 29. eo -.35 » .85 -.65 1.13 C576 0 65.05 15.17 30.45 64.47 16.10 29.75 -.57 .92 -.69 l .29

GRAND MEANS

65.65 17.40 65.12 18.34 29.59 .94 -.6^ 1.27

SD OF MEANS

.50 1 .22 1 .20 .36 .08 . 05 INCLUDED LABS FOR THIS MEAN

42 43 45 42

1977-1970

INST CODE LAB

70 HM Cl

c 70 H M Cl 2 1

7 OHA Cl 4 8 70H A Cl 5 0 70HA Cl 52

7 OHM C 2 1 3 70BA C241

“'OGC C25

70PM C256

70 H A C 259

70 H A C?62

70HA C295

7 OHA C283

70HA C291

70HM C31

70 HA C325

’’’OHA C352

70HM C 356

“'OHA C382

70GE C417A

70HA C42 0 70CA C 42 4 70HA C440

70 HM C442

70HA C454

70H \ C456

70HM C458

“'OHA C4“'5 70 HA C4^7

70ZF C483

7 OHA C494

70 HQ C49 8 70SC C499A

70SC C49 9B

7 OH A C506

70GD C514A

70GX C51 48 70CX C518

70GP C541

70SC C 34 3

70H A C

c 44

7 0 HQ C 54 6

70HM C546R

70HQ C54 7 70HA C550

70 HM C575

5
REPORT N0. 22 MCCA COLLABORATIVE REFERENCE PROGRAM

L, a, b SPACE ANALYSIS, NORMAL DATA COLOR COLOR DIFFERENCE

1977-1578

LAB SAMPLE C81 SAMPLE C82 DIFFERENCE C82 - C81 INST CODE F MEAN L MEAN A MEAN B MEAN L MEAN A MEAN B AL AA AB AE CODE LAE

Cl 0 5 0 34.80 -13.70 2.40 33. 80 -13.50 2.10 -1 .00 .20 - . 30 1.06 70HM Cl 05

C 1 2 1

0 34 . ec -13.80 2.55 33.80 -13.60 2.30 -1 .00 .20 -.25 1 . 05 7 OH M Cl 21

Cl 4 8 0 35.00 -14.10 2.50 24.10 -13.85 2.20 -.90 .25 -.30 .98 70FA ci 4e

Cl 5 0 0 35.15 -13.55 2.51 34.19 -13.70 2.17 -.99 . 25 -.34 1 . 07 70FA C 1 5 0 Cl 52 0 3 5.40 -14.20 2 .70 34.50 -14.00 2.30 -.90 .20 -.40 1 .00 70H A CIS?

C213 0 34.70 -13.60 2 . 50 34 . 30 -1 2 . SOX 2.20 -.40 X 1.10 X -.30 1.21* 70 HM C21 3 C2 41 0 35.00 -13.70 2. 50 34.20 -13.75 2.05 - . 80 -. 05 X - . 45 * .92 70HA 0 24 l C253 0 35. oe -13.81 2.72 34.13 -13.58 2.41 -.95 • 23 -.30 1 . 0? 70CC 025?

C256 0 24.56 -1 3.56 2.68 33.96 -13.76 2.36 -1 . 00 .20 -.31 1 .07 70HM 0256

C259 0 34.80 -13.80 2.70 34.05 -13.50 2.30 -.75 .30 -.40 .90 7QHA C259

C262 X 1 2. SIX -16.90X 2.66 1 1 • 97X -1 6.78X 2.26 - . 54 X . 1 3 C285 0 36. SOX -13.50 3.50* 35.70X -13.10* 3.20* -.80 .40

C28 8 0 35.30 -14.00 2.20 34.50 -13.65 1 .85 -.80 .35

C29 1 0 35.00 -13.80 2.70 34.10 -13.60 2.30 -.90 .20 C317 0 34 .7C -13.75 2 .40 33.70 -13.50 2.00 -1 .00 .25 C325 0 12.60X -17. 2 OX 3.15 1 2.00X -1 7.00X 2.75 -.60 X .20 C352 0 35.10 -14.00 2.40 24.30 -13.70 2.10 -.80 .30 C35 6 0 34.70 -13.60 2.30 23.80 -13.40 1 .90 -.90 . 20 C382 0 35.05 -14.00 2.40 34.05 -12.70 2.10 -1 .00 .30 C4 1 7 A 0 34.94 -i4.ee 1 .85 34.07 -13.71 1 . 44 - .86 .37

C42 0 0 35.50 -14.20 1.70 34.70 -14.00 1 .40 -.80 .20 0424 0 25.76* -13. ei l .eo 34.75 -13.56 1.5) -1.01 .25 0440 0 35.30 -14.14 2.76 34.46 -1 3.09 2.42 -.84 .25 0442 0 34.80 -13.90 2.00 33.90 -13.60 1 .60 -.90 . 30 C454 0 24.89 -13.42* 1 .80 24.10 -13.12* 1 . 46 -. 79 .30

C4 5 6 0 35.24 -14.CS 2.36 24.41 -13.79 2.03 -.83 . 26 C458 0 34.85 -13.74 2 • 06 3 2.92 -1 3.56 1 .78 -.93 • 1 8 C475 0 35.30 -13.79 1 .58 34.44 -13.60 1 . 25 -.86 . 19 C477 0 35.37 -13.82 1 .91 24.58 -1 3.60 1 .59 -.78 . 22 C483 0 35 .50 -14.22 2.37 34.64 -14.27* 2.2? -.86 -.05

C49 4 0 35.30 -14.10 1 .80 34. 45 -i2.es 1 .45 -.85 .25

C49 8 o 34 .40 -1 3.40* 1 .60 23.40 -13.30 1 .30 -1 .00 . 1 0 C499A 0 34 .70 -14.05 2.30 23.90 -13.80 2.00 - .80 . 25 C499B 0 34.20 -14.40* 2.40 33.30* -1 4.25* 2.30 -1 .00 .15 C506 0 35.10 -13.90 . 2.65 34.10 -13.70 2.30 -1 .00 . 20

C51 4 A 0 35.23 -14.33 2.77 24.24 -14.03 2.44 -.89 . 30

C51 4 B 0 35.25 -1 1 • 95 X . 10X H 1C -11 • 70X - .20X -.90 . 25

C5 3 8 0 36.20X -1 3.00X 1 .00* 25.3 OX -1 2. 90X • 65X - .90 • ? 0 0541 0 34.50 -1 5.60X 3.20 23.60 -1 5.20X 2.70 - .90 . 40 C543 0 35.35 -14.00 2.40 34.45 -13.80 2.10 -.90 . ?o C544 0 35.00 -14.10 2.65 34.20 -13.90 2.35 -.80 . 20 C546A 0 34.20* -13.65 1 .70 23.40 -13.40 1 .40 -.80 .25 C546B 0 34 .55 -13.75 2.60 33.60 -13.50 2.20 - .95 . 25 C547 0 34.67 -13.70 1 .80 33.82 -13.41 1 .47 -.85 .29 C550 0 24.90 -14.00 2.60 34.10 -13.70 2.30 -.80 . 3C C576 0 34.54 -13.83 2.57 23.68 -13.58 2.25 -.86 .25

GRAND MEANS

34.99 -13.09 2.24 3 4.10 -13.67 2 . 05 -.89 .25 SD OF MEANS

.35 .23 .48 . 36 .25 . 43 .08 . 06 INCLUDED LAES FOR THIS MEAN

42 41 *4 42 40 43 43 42

.40 • 69X 70HA

.30 .54 70H A 0285

-.35 .94 ’’OhA C28

-.40 1 .CO 70HA O 29

-.40 1.11 70HM C 31

-.40 .75* 70HA C325

-.30 .91 -.40 1.00

-.30 1 .09

-.41 1.02 -.30 .68 -.30 1.05

-.33 .53 -.40 1.03

-.3? .90 -.33 .53

- . ^0 .c c -.23 .54 -.31 .e7 -.14 X .87

70HA C3S2

70HM C356

70 H A C 382 70GE C 4 1 7 A ^OHA C420

7 OCA C4?4

70HA C440

70RM C44?

•'ORA ^.45 4

7QH A C456

7 OHM C45R

70HA 04 75

7 0 ha 04 7 7

7 OZ F C483

35 .95 70H A C494

30 1 . 05 7 0 dQ C49e

30 . 89 7 0 SC C 49 9 V 10 X 1 .02. 70SC C499B

35 1 • 06 7 0 H A C506

32 .99

30 .98

35 .99

50 X 1.10

30 .97

30 .88

30 . 89

30 1 .03

33 .96

30 • 91

32 .95

70GD C51 4

70GX C C 1 AB 70GX C538

70GP 0541

7 OSC C54 3 70dA C 544

7 0H0 C546A

70HM C546B

70BQ C 54

‘’ORA C55 0 70HM C57

-.23 .96

• 04 O 00

42 45

6
REPORT NO. 22 MCCA COLLABORATIVE REFERENCE PROGRAM 1977-ic-?e

WHITE SAMPLE ANALYSIS

X, Y, Z LABORATORIES LAB RAT 1 6* -< LAE/COMBINED » INST PERCENT FRCM CflMB INFO C6DE X Y Z CODE X Y Z

Cl 22 .^ee .9959 1.0020 7 0SA -.12 -.41 .20

Cl 62 1,0122 1 .01 1 4 1 .01 30 7 ODC 1 • 32 1.14 1.30

C2 0 0 1 • C 077 1 .0073 1.0091 7 OGE .77 .73 .91 C244 • 9943 .9eee .9970 7 0S A - • S 7 -1.12 -.30

C2 5 0 • 9988 .9980 1 .0006 7 OZF - . 12 -.20 .06

C251 1 .0013 1.0002 1 .0006 70ZE . 1 3 .02 .06 C314 1 . C125 1 . 0098 1 .01 34 7 OCE 1 .25 .98 1 .34

C4 07 1.0154 1 .01 3C 1 .01 37 70SA l .54 1 .30 1 .37

C4 12A 1 .0075 1 • 0 O 7 6 1.0085 7 OGE .75 .76 .85 C412B 1 .0019 1.0024 1.0010 7 OGE .19 • 24 .10

C414 1 .0177 1 .0140 1 .0231 7 OSA 1 .77 1 .40 2. 31 C416A 1.0174 l.oi ce 1 .01 60 70S A 1 . 74 1 .68 1 .60

C41 6B 1 .0201 1 .0203 1 .01 76 7 0SA 2.01 2.03 1 .76

C4 1 7 B .9975 .9965 1 .0005 7 OBN -.25 -.35 .05 C418 1 .0276 1.0252 1 . 0392 7 OCE 2.76 2.52 3.92

C4 2 2 .9842 .9830 .9807 70SA -1 .58 -1. 7 0 -1 .93 C42 3 1 .0521 1.0526 1.0544 70GE 5.21 5.26 5.44 C428 1 .0056 1 .0034 1 . 01 09 70HB . 56 .34 1 . 09 C437 1 .CO 99 1.0078 1.0224 70CE .99 .78 2.24 C443 1.0108 .9990 1 .0066 70CN l . oe -.1 0 .66

C444 1 .0092 1 .0098 1 .0120 7 OCE .92 .98 1 .20

C4 45 1 .0260 1.0253 l . 0327 70 L S 2.60 2.5^ 3.27

C4 46A .9978 .9974 .9999 7 OGE - .22 -.26 -.01 C446B 1 .0009 1.0005 1 . 0036 70CA .09 .05 .36 C451 1 .01 09 1.0127 1.0104 7 OGE l .09 1.27 1 . 04

C4 59 .9946 .9953 .991 1 7 OGE - . 54 - .47 -.89

C4 6 0 1 .0150 1 .01 63 1.0161 7 OGE 1 .50 1.63 1 .61 C463 1 .01 1C 1.0101 1 .0125 70ZD 1.10 1 . 01 1 .25

C4 67A 1.0129 1.0144 1.0149 7 OGE 1 .29 1.44 1 .49 C467B 1 .0077 1.0057 1 .0095 7 OB B .77 .57 .95

C4 69 1 .0182 1 .0170 1 .0266 7 OGE 1 . 82 1.70 2.66

C4 7 0 1 .0222 1.0222 1 . 03 2 3 7 OGE 2.32 2.22 3.23

C472 1 . ooe6 1 .0079 1 .C109 70ZD . 86 .79 1 .09 C473 1 .0072 1.0077 1.0102 70GE .72 . 7"7 1 . 02 C474 1 .0103 1.0105 1 .0084 7 OGE 1 .03 1 .05 • 84

C476 1 .0043 1.0030 1 .0060 70S A .43 .30 .60 C479A .9960 .9975 .9869 7 OSA - .40 -.25 -1 .31 C4 79B 1 .0226 1.0225 1.0275 70SA 2.28 2.25 2 .75 C480 1 .0052 1.0024 1.0117 70HB .52 .24 1.17

C481 1 .0240 1 .0210 1 . 0324 70KS 2.40 2.10 3.24

C495 1 .1441 1 . 1 388 1.1493 70KS 14.41 13.88 14.93 C496A 1 .0120 1.0127 1 • C 09 7 7 OGE 1.20 1 .27 .97 C503 1.0110 1.0113 1.0076 7 OGE 1.10 1.13 .76 C508 1 .0079 l .ooea 1.0071 7 OGE .79 .82 .71 C511 1 ,C04e 1 .0047 1 . 0043 7 OB A . 4e .47 .43

csie 1 .0050 1.0048 1 .0047 7 0 KT .50 .48 .47

C51 9 .9675 .9976 .9203 7 OK S -3.25 -.24 -7.97

C521 A 1 .Oie3 i .01 e6 1 .0202 70CA i . e3 1 .86 2 . 02 C521 B 1 .0603 1 .0608 1 .0592 7 0SA 6 . 03 6.08 5.92 C522 .9942 .9939 .9888 70SA -.58 -.61 -1 .12 C524 .9754 .9817 .9708 70SA -2.46 -1.83 -2.92

C526 1 .0037 l .002e 1 .0097 7 0 K S .37 .28 .97 C528 .9846 .9832 .9844 7 OS A -1 .54 -1 . 68 -1 .56 C531 1 .0126 1.0126 1 .01 89 70GE 1 .26 1.26 1 .89 C532 1 .0096 1 .0095 1 . 01 42 70SA .96 .95 1 .42

CS 34 1 .0424 1.0423 1 • 0423 70GE 4.24 4.23 4.23 C536 1 .0055 1 .0050 1.0066 7 OK S .55 .50 • 66

CS 37 1 .0088 1.0424 .9627 7 0 DM • ee 4.24 -3.73 C540 i .coes i .ooes 1.0089 7 OGE . 86 . 85 .89 C54 5 1 .0016 1 .0030 1 .0066 70SA .16 .30 .66 C548 .9954 .9937 .9902 7 OSA -.46 -.63 -.98 C549 .9729 .9727 .9841 70GE -2.71 -2.73 -1 .59 C552 .99ee .9967 1.0036 7 OBN - . 14 -.33 .36

7
REPORT Ne. 22 MCCA COLLABORATIVE REFERENCE PROGRAM 1<5“7-19"’8 WHITE SAMPLE ANALYSIS

L, a, b LABORATORIES LAP RAT 10- -< LAB/C6MEINED ) INST PERCENT FR6M C0MBINED

CODE X Y Z CODE X Y Z

Cl 05 .9976 .9957 1 .0037 70 B M -.24 -.43 . 37

Cl 21 A 1 .0011 .9968 1 .0054 70HM • 1 1 -.12 • 54

Cl 48 1 • 0 C71 .0051 1 .Cl 1 7 7 0 HA .71 .51 1 . 17

Cl 50 1 .0023 1.0026 1 .0092 7 OHA .33 .26 .92

Cl 52 1 .0194 1 .0177 1 .0268 70H A 1 .94 1 .77 2.68

C21 3 .9929 • 9e95 .9944 70HM -.71 -1.05 - .56 C241 1 .0149 1.0135 1 .0203 7 OHA 1 .49 1.35 2.03

C253 1 .0197 1.0169 1.0142 70GC 1 .97 1 .69 1.42

C2 56 l .0010 • 99ee 1 .0057 7 OHM .10 -.12 .57

C2 59 l .0005 .99ee 1 .0039 7 OH A . 05 -.12 . 39 C262 .9337 .9314 .9405 70HA -6.63 -6.86 -5.95

C2 85 l .0310 1.0293 1 . 0456 7 OHA 3.10 2.93 4.56

C288 l .0188 1.0177 1 . 0299 7 OHA 1 .68 1 .77 2.99

C291 l .0056 o o

<n 1 . C079 7 0H A . 56 .51 .79

C31 7 l .CCOO .9978 1 .0042 7 OH M . 00 -.22 .43

C325 .9217 .9282 .9322 7 0HA -6.63 -7.18 -6.78

C352 l . CC92 1 .0072 1.0154 7 0 HA .92 .72 1 .54 C356 .9973 .9957 1.0037 7 OHM -.27 -.43 • 3"r C3 82 i • C C59 1 .00 20 1 .0066 7 OHA . 59 .30 .66

C4 1 7 A l .0129 1.0141 1 .0149 7 OGE 1 . 29 1 .41 1 .49

C42 0 l .0122 1 .0093 1 .01 37 7 OHA 1 .22 .93 1 . 37

C4 2 4 l .01 16 1.0102 1.0212 70C A 1.16 1 .03 2.12

C4 4 0 l .0148 1.0114 1 .0153 7 OHA 1 .48 1.14 1 . 53 C442 .9988 • 9 9 7 8 1.0043 70HM -.12 -.22 .43 C4S4 l .0147 1.0107 1.0209 7 OH A 1 .47 1.07 2.C9

C4 56 l .0144 1.0142 1.0244 7 0 HA 1.44 1 .42 2.44

04 5 E l .0003 .9984 1 .0063 7GBN . 02 -.16 .63 C475 l .0073 1 .0039 1 .01 1 3 7 OH A .73 .39 1.13

C477 l . C09e 1 .0070 1 .0091 7 0H A .98 .70 .91 C4 8 3 .9956 .9937 .9978 70ZF - .44 -.63 -.22 C494 l .0194 1.0177 1 . 0276- 7 OHA 1 .94 1 •"T 7 2.76

C4 9 8 l .0078 1 .0061 1 .0067 7 0BQ . 7e • 61 .67 C499A l .0005 .9988 1 .0031 7 OSC .05 -.12 .31 C499B l .0218 .9957 1 .0037 7 0SC 2.18 -.43 .37 C506 l • C 057 1.0040 1 .0092 7 OHA .57 .40 .92

C5 1 4 A l . 0021 1.0007 1.0021 7 0GD • 21 .07 .31 C51 4B .9890 .9915 .9843 7 OGX -1.10 -.85 -1 .57 C53 8 .9840 .9852 .9826 7 OGX -1 . 60 -1 .47 -1 .74 C54 1 l .0180 1 .0580 1 .062 2 70GP 1 .80 5.80 6.32 C543 l .0216 1 .020e 1 . 03 31 7 OSC 2.16 2.08 3.31 C544 l .0026 1 .0020 1.0101 7 OH A .36 .20 1 .01 C546A l .0075 1.0061 1 . 0067 7 OHO • 75 .61 .67 C546B .9822 .9822 .9885 70HM -l . 6e -1 .78 -1.15 C547 l • 0 0 7 9 1 . 0062 1 .0067 7 0 HQ . 79 .62 .67 C55 0 l .0095 1 .0072

1.0121 7 0 HA .95 .72 1 .31 C5 76 .9958 .9938 1 .0022 70HM - . 42 -.62 • 22

8
REP0RT N0. 22 MCCA COLLABORATIVE REFERENCE PROGRAM 1977- 1 978

X, Y, Z SPACE ANALYSIS, ADJUSTED DATA COLOR COLOR DIFFERENCE

LAB SAMPLE C79 SAMPLE C80 DIFFERENCE C80 - c 79 INST CODE F MEAN X MEAN Y MEAN Z MEAN X MEAN Y MEAN Z AX AY AZ AE CODE LAE

Cl 22 fl 48,56 44.28* 16.77 48.06 43.53 16.92 -. 50 -.75 . 15 2 . 49 70S A C 1 22

C 1 62 0 4e.ei 44.23 17.36 48.59* 43.67* 17.60 -.22 -. 55 • 24 2.75 70 DC Cl 62 C2C0 0 48,40 43.60 17.50 48.04 42.93 17.76 -.36 -.67 .26 2.85 70GE C200

C244 0 4e,54 42 .78 15.99X 48.19 42 . 07 1 6.29X -.34 -.71 . 30 3.31 70SA C24 a C25 0 0 49 ,39X 44.39* 17.11 49.06X 43. 69* 17.47 -.33 -.*o .35 » 3.19 70ZF C250

C251 X 48.40 42.59 16.64 48.22 42.19 17.00 -.18 -.40 » • 36 » 2.0 7X 70ZE C25 1 C31 4 0 48.06 43.77 17.92* 47.65 42.97 1 7.98* -.42 -. 80 .06 * 3.42* 70CE C31 * C4 0 7 0 48.36 43.28 16.96 47.96 42.61 17.20 -.39 -.68 .24 2.68 70SA C407

C4 1 2 A 0 47 .97 42.97 17.35 47.73 42.42 17.61 -.25 -. 55 .28 2.64 70GE C41 2 A C41 2B 0 4e.Cl 43.00 17.35 47.75 42.43 17.61 -.26 — . 5

"* . 26 2.67 TOGE C4 1 2 B

C41 4 X 48. e9 44 .50* 17.71 48.53 43.61 17.85 -.36 -.89 . 1 * 4. 4 7X 70SA C41 4 C4 1 6 A 0 47 .9 1 42 .64 16.92 47.54 41 .96 17.11 -.37 -.69 .19 2.9-» 7 0 SA C41 6A CM 6B 0 47.77 42.73 17.00 47.40 42.05 17.15 -.37 -.68 .15 2.90 70S A C41 6 B C41 7B 0 48.57 43.00 16.78 48.26 42.36 16.94 -.31 -. 64 .16 2.94 70HN C41 7R C41 8 0 47.9 1 43. e4 17.39 47.63 43.21 17.56 -.29 -.63 .17 2.91 70CF CM 8

C42 2 0 48.25 42.00 17.10 47.78 41 .98 17.23 -.47 -.82 . 1 3 3. 35* 7 0 3 A Ca2?

C42 3 0 47. e3 42.53 17.28 47.33 41 .76 17.47 -.49 -.76 .19 2. 77 700E C423

042 8 0 4e.95* 43.59 17.03 48.70* 43.02 17.30 -.26 -.56 .28 2.66 70ITH C*2 8 C437 X 48.1 e 44.20 1 7 • 71 <*8.01 43.52 1 7.85 -.17 -.68 .15 4 . 1 OX 70CE CAT 7 C44 3 0 48.65 43.77 16.92 4e. 1 7 43.00 17.06 -.49 -.77 .14 2 .72 70CN C AA ^

C444 0 4e.l7 43.25 17.10 47.67 42.43 17.23 -.50 -.82 .13 7.10 70GE C A^A C445 0 47.94 42.92 17.63 47.54 42.21 17.79 -.40 -.72 . 16 2.92 70 LS C * 4 5 C446A 0 4e .1 4 42 .93 17.23 47.68 42.16 17.34 -.46 - . 7

_? .12 2.97 7 OGE CA46A C446B 0 48.36 43.26 17.23 47.83 42.44 17.36 -.52 82 .12 2.94 70CA C446B

C451 0 48.18 43.26 17.38 47.60 42.38 17.52 -.59 -.87 .14 2.98 70CF C451 C459 0 47.83 42.75 17.04 47.31 41.93 17.14 -.53 -.82 .10 2.95 70GF C459

C460 0 47.85 42 .es 16.93 47.34 42.06 17.10 -.51 -.79 . 17 2.86 70GE C460

C*63 0 48.28 43.15 17. C2 47.76 42.30 17.12 -.52 -.64 .12 3.12 rozr C463

C467A 0 47.70 42.62 16.93 47.38 42.02 17.19 -.33 -.60 .26 2.53 70GE C467A

C467B 0 48.49 42.66 16.80 4e.25 42.28 17.03 -.24 -.59 • 24 3.02 70 H B C467R

C469 0 47.85 43.15 16. 77 47.46 42.45 16.91 -.38 -.70 .14 2.89 -»OGF C*69

C4 7 0 0 4e.l2 4 3.18 17.48 47.92 42.70 17.82 -.20 -.48 .33 2.42 70GE C470

C472 0 48.40 43.39 17.50 48.05 42.70 17.67 -.36 -.69 .17 2 .99 ?ozr C47?

C47 3 0 47.72 42.39 16.96 47.30 41 .68 17.15 -.42 -.71 . 19 2.81 70GE 04^3

C474 0 4-. 91 42 .61 17.07 47.64 42.23 17.30 — . 2 7 -.58 . 27 2.75 7 OGE C4 7 u

C47 6 0 4e.24 43.08 17.40 47 .94 42 . 46 17.62 -.30 -.62 .22 2.87 70S A C476

C479A 0 48.70 43.26 25.33X 48.54 42.81 25.64X -.15 * -.45 * . 30 2.45 70SA C 4 79 A C*79B X 4e . 1 7 43 . oe 17.57 48.79* 42.53 17.58 .62 X -.55 .00 * 9 . 38X 7 OSA C479P

C480 0 47.29* 41 .98 1 3.35X 46.86* 41.26 1 3.47X - .42 -.72 • 12 2.91 70HB C460

C481 0 48.1 1 43.49 1^.09 47.75 42.75 17.20 -.35 -.74 • 21 3.41* 70 K S C481

C495 0 48.24 43.16 17.25 47.83 4 2.46 17.51 -.41 -.70 . 27 2.81 70KS C49S

C496A 0 47 .76 42.72 17.04 47.49 42.14 17.28 -.27 -.58 .24 2.75 70GF C496A

C503 0 47.56 42.50 16.90 47.18 41 . e3 1 7 . 07 -. 38 -. 6"T .17 2.79 70GE C503

C508 0 >1 CD O 42 .74 17.07 47.13 41 .79 17.08 -.67 * -.96 * .01 • 3,13 7 OGE C508

C51 1 0 48.61 42 .ee 17.80* 48.4 3 43.23 18.10* -.38 -.65 .30 2.58 7 0 BA C51 1

C51 6 0 48.69 44.22 17.12 48.45 43.62 17.31 -.24 -.60 .19 2.95 70XT C51 6 C5 1

0 48.29 42 .24 17.21 47.96 41 . 57 17.40 -.33 -.67 .19 3.14 70KS C519

C52 1 A 0 48.1 3 42. 9C 17.02 47.79 42.24 17.19 -.34 -.65 .17 2,86 70CA C521A

C521B 0 47.27* 42. CO 16.35* *6.73* 41.15 1 6.63* — • 55 -. 84 .28 3.11 70S A C521 F C52 2 X 47 .es 42.65 1 6 .26* 47.67 42.00 16.49* -.18 -.65 .23 3.9 5X 7 0S A C522

C52 4 0 48.10 41.51* 17.30 47.62 40.75* 17.50 - .49 -.76 .20 2.92 70SA C5?4

C52 6 0 4e .1 4 43.59 17.16 47.79 42.92 17.29 -.35 -.67 .23 2.84 70 K £ C«2 6 C528 0 46.41 43 .26 17.45 46.02 42.55 17.50 -.39 -.71 .14 2.96 7 OS A c^e

C531 0 4e.l9 42.45 17.15 47,91 4?.e7 17.42 -.29 -.58 .26 2,60 70GF 053

CB32 0 4e.ce 43.22 17.46 4 7,73 42.62 17,72 -.33 -.60 • 26 2. St 70 SA C C534 0 4ft. SOX 42.02 1 5.97X 4ft , 21

41.42 16.14X -.30 -.60 .17 2.76 "*0OE C 534

C53 6 0 47.07 42.79 17.04 47,60 42.22 17.27 -.27 -.56 .23 2.61 70KS C53 6 C537 0 49 • 8 1

43 .96 17.80* 49.35X 43.24 18.02* -.46 -.72 • 22 2.60 70DW C537

C54 0 0 48. C5 42.97 17.55 47.77 42.39 17.77 -.28 -.58 • 22 2.65 70GE C 54 0 C545 0 47 .ee 42.70 16.71 47.47 41 .99 16.91 -.39 -.71 .20 2.97 70SA C54 5

C54 8 0 48.17 41 .06 16.97 47.72 41.16 17.17 -.45 -.70 .20 2.68 70SA r 54 e C549 0 47.56 42 .se 1 6 .50* 47 .42 42.15 16.89 -.13 * -.43 * .40 * 2.50 7 OGE C549

C552 0 4e.27 42.88 16.86 47.90 42.25 17.11 -.37 -.63 • 24 2.56 70BN C552

GRAND MEANS

48.13 43.05 17.15 47.75 42.37 17.35 -.37 -.68 .20 2.85

SD 0F MEANS

.36 .61 .31 • 40 . 63 .31 .11 .11 .07 . 24 INCLUDED LAES Fefi THIS MEAN

55 58 54 55 58 54 58 58 58 58

9
REPORT NG. 22 MCCA C0 LLA B CRAT I VF. REFERENCE PRG^RAM

X, Y, Z SPACE ANALYSIS, ADJUSTED DATA C0L0H CflLtJfi DIFFERENCE

LAB SAMFLE C81 SAMPLE C82 DIFFERENCE C92 - C81 INST C0DE F MEAN X MEAN X MEAN Z MEAN X MEAN X MEAN Z AX AT AZ AE CADE

Cl 2 2 X 9 .21 12.35 13.17 8.61 11.65 12.67 -.60 70 -.50 3 • 41 X 70SA

Cl 62 0 9.51 12.51 13.69 9.02 11.87 13.15 -.49 -.64 - . 54 2. 34 70 DC C20 0 0 9.41 12.37 13.61 8.89 11.70 13.17 -.52 -.67 -.44 2.83 70CE

C24 4 0 e.ei 11 .91 12.97 e. 21 * 1 1 .28 12.23 -.60 -. 63 - . 74 * 3.19* 70SA C250 0 9.26 12.52 13.69 8.89 11.92 13.34 -.37 -.60 -.35 2.32 70ZF

C251 0 9.23 12.20 13.10 8 . 86 11.60 12. '’A -.37 - . 60 -. 36 2.40 707. E C314 0 9.94 12.81 14.18 9.45 12.20 13.61 - .45 -.61 -.57 2.22 70CF C407 0 9.49 1 2.34 13.23 9.19 11.91 12.99 - .31 * - . 43 * - • 24 * 1 . 70 "OSA

C41 2A 0 9.46 12.43 12.46 9.03 11.88 13.0! -.43 -.56 - • 45 2.10 70GF

C41 2 B 0 9.46 12.43 13.47 9.03 11.88 13.04 -.43 -.55 -.43 2.12 "OCF

C414 0 9.83 12.74 14.00 9.36 12.14 13.47 - .47 - .60 -.52 2.16 70S A C41 6A 0 9.18 12.16 13.13 8.77 11 . 61 12.72 -.41 -• 55 - .41 2.07 70SA

C41 6B 0 9.19 12.14 13.18 8.66 11.47 12.61 -.53 -.67 -.57 2.59 70SA

C41 7 E 0 9.10 12. C7 12 ."5 6.62 11.47 12.26 -.48 -.61 - .49 2 . 39 "0 HN C41 8 0 9.57 12.67 13.71 9.06 11.99 13.17 -.51 -.6e -.54 2.46 70CE

C422 0 9.19 12.09 12. "4 8.75 11.53 12.22 -.43 56 - .42 2.18 70S A C42 3 0 9.45 12.41 13.32 9.01 1

. es 12.84 - .45 -. 57 - .48 2.12 70GF

C4 2 8 0 9.19 12.16 12.91 e.65 11.49 12.34 -.54 -.57 -.57 2.65 70PB C437 0 9.65 12.71 14.35* 9.30 12.07 13.81* - .55 -.64 -.54 2.79 70CE

C44 3 0 9.44 12.43 13.39 e.94 11.84 12.90 -.50 -.60 -.49 2.53 70CN

044 4 0 9.21 12.12 13.38 e .75 11.55 12.92 - .45 - . 58 -.46 2.26 70GF C445 0 9 .60 12.54 12.74 9.09 1 1 .91 1 3.19 -.51 -.63 -.54 2.45 70LS

C44 6A 0 9 .49 12.46 13.35 8.99 11.83 1 2. 81 - .50 -.63 -.54 2.39 70GF C446B 0 9.51 12 .48 13.53 9.05 1 1 .90 12.98 -.46 -.58 -.55 2.10 7 OC A C451 0 9.22 12.14 13.22 e.^2 11.49 12.74 -.50 -.65 -.58 * . 40 70GF

C459 0 9.31 12.20 13. 35 e.7? 11.54 12.78 -.54 -.65 -.57 2.63 "OCF

C4 60 0 9.18 12 .ce 12.24 8.70 11.47 12.73 - .48 -.61 -.51 2 .34 "0«.F C4 6 2 0 9.34 12 .32 13.44 8.80 11.65 12.85 -.54 -.66 -.59 2 . 60 ’oz r C46 7A 0 8.93 11.83 12.99 8.54 11 .33 12.60 -.39 -.51 -.39 2.(0 "Oc;» C467B 0 9.11 12.16 12.77 8.68 1 1 .60 12.35 - . 42 -.56 -.42 2.14 ’CHH

C469 0 8.79 1 1 . 70* 12.99 6.26 1 1 . 04* 12.43 - .53 -.66 -.56 2.71 "OGF C470 0 9.74 12 . 7C 1 2 .87 9.28 12.11 13.39 -.46 -.60 -.40 2 . **0 70 GF C47 2 0 9.80 12.77 14.15 9.25 12.10 13.57 -.56 -.67 -.58 2.66 7 07 r C473 0 9.29 12.29 12.17 6.82 11.68 12.68 -.48 -.61 - .49 2.33 70GE CA74 0 9.24 12 .27 12.23 8.90 11.73 12.82 - .44 -.42 2.21 70GF

C47 6 0 9 .61 12.57 12.78 9.24 12.07 13.43 -.37 -.50 -.35 1 .92 "OS A C479A 0 9.24 12. C3 22 .04X e .94 11.53 21 . 79X - .30 • -.50 -.25 * 2.30 70S A C479P 0 9.67 12.56 13.75 9.30 12.13 13.27 • • 7"* » -.48 1 • 65* 70 S A C480 0 6.65 1 1 .77 12.55 8.37 11.1" 12.03 -.49 -.60 -.52 2.42 70 H R C481 0 9.58 12.44 13. e3 9.08 1 1 .80 13.27 - .49 -.65 -.55 2.35 70 K S C495 0 9.68 12.63 13.86 9.09 11.93 13.23 -.59 -.70 -.63 2 • 8 C 70 FS C496A 0 9.1 2 12 . C6 1 2.21 e.70 1 1 . 51 12. 7 8 -.42 -.43 2.14 70GF

C50 ? 0 9.16 12.05 13.16 6.62 1 1 . 37 12.58 -.54 -.68 -.59 ? • 62 70GE

C5 0 8 0 9.17 12.11 12.15 8.68 11.49 12.63 -.49 -.62 -.52 2.41 70OF

C51 1 0 9.66 12.71 12.98 9.13 12.03 13.41 - .54 -.68 -.57 2.58 "ORA

C51 6 0 9.08 11.64 12.20 e.65 1 1 .28 12.e4 - .44 -.56 -.46 2.20 70 K 7 C519 0 9.61 12 .66 12.72 9.23 12. 14 13.32 - . 38 -.52 -.40 1 .87 "OKS

C52 1 A 0 9.41 1 2 .38 12.25 e.9e 11.79 12.74 - . 44 -.60 - . 52 2.12 70C A C521 B 0 6.97 1 1 .90 13 .C2 e.7o 11.60 12.76 - .27 » -.30 X -.25 • 1 • S'7 * 70SA

C52 2 0 e .se 12.37 12.76 e .56 11.78 12.32 -.4 2 -.59 - . 44 2.13 70SA

C52 4 0 9.79 12.85 12.14 9.25 1 2.29 12.71 - . 44 56 -.43 2. 11 70S A C52 6 0 9.57 12.35 12. 82 9.08 11.73 13.29 - .45 -.62 -.53 2.35 70 K

C528 0 9.53 12.47 13.60 9.04 11.86 13.08 - .45 -.6? -.52 2.33 7 0S A C53

0 9.51 12.40 1 2 . e 2 9.24 11.99 13.57 -.27 * -.40 X -.24 • 1 .57* 70CF C532 0 9.21 12.25 13.34 8.86 11.68 12.87 - .45 -.57 -.46 2.22 70S A C534 0 8.4 7* 1

• 04 X 12.42* 6.02* 1 0. 46X 1 1 .52* -.45 -.58 -.51 2.29 70CF

C53 6 0 9.41 12. 36 13.48 9.00 1

. 81 13.04 - .42 -.55 - .44 2. 05 "OKS C537 0 i o.i e* 12.91 14. C6 9.72* 1 2. 31 13.53 - . 46 -.60 -.53 7.10 "0 DM C54 0 0 9 • e4 12 .eo 13.80 9.50 1 2.31 13.49 -.34 -.49 -.32 i . ec 70CF C545 0 9.04 1 1 .97 1 2 .95 6.55 11.35 12.44 -.49 -.62 -.51 2.44 "OSA

C54 8 0 9.09 12.13 12.62 8.54 11.47 12.12 - .55 -. 65 -.50 2.95 70 SA C549 0 e .so 11 .72* 12.65 8.27 1 1 .06* 12.29 -.52 -. 66 - . 57 2 . 63 "0CE CSS 2 0 9.22 12.19 12.73 8.70 11.55 12.19 - .52 -.64 -.55 2.52 70 HN

GRAND MEANS

9.35 12.32 13.37 8.89 11.73 12.86 -.46 -.60 -.48 2.31

SD 0F MEANS

• 32 •30 .44 .33 .31 .44 .07 . 06 • 10 • 32 INCLUDED LABS F 0R

62 THIS MEAN

61 61 62 61 61 62 60 62 62

7- 1 C7fi

LAH

Cl ??

C 1 6 2 C20 0 C244

C2F0

C251

c ? i 4 C407

C 4 l 2 A C4l 2 B

C41 4 C41 6 A C41 6P C 4 1 7P C4i a C422 C422

C428

043''

C 444

C 4 4 5 C446A C446P

C 451 Ca59

C46 0

C*4 C

-a

fAf-’H

C4 6 C (470

C472

C47 7 C4 74

C47f C479A

C4-»c B C48C

C401

( 4C5

CaefcA C c O 3 CSOP

C C 1 1

C51 6 C51 9

C- 5 2 1

C r ?lP

C c ?.2 C524 C526

CE?>e C5?l

C52 2 C£34

C5?6

C c ?7

C c 4 0 C545 cs4e

CC4 9 C55?

10
RE PART NO. 22 NCCA C6LLAB6RATI VE REFERENCE PROGRAM

L, a, b SPACE ANALYSIS, ADJUSTED DATA COLOR COLOR DIFFERENCE

1 97 7® J G

78

LAB SAMPLE C79 SAMPLE C0O DIFFERENCE C80 - C79 INST CODE F MEAN L ME A K A MEAN B MEAN L MEAN A MEAN B AL AA AH AE CADE LA

Cl 05 e 65.69 16.78 30.59 65.14 1 7.78 29.89 -.55 1 . 00 -.70 1 . 34 70 HM Ci 05

Cl 2 1

e 65.1 4 17. SI 29.92 64.74 18.41 29.22 -.40 .90 -.70 1 .21 70 HM Cl 21 A C 1 4 8 0 65.53 1 6 .90 30.23 65.08 17.70 29.53 - .45 .80 -.70 1.15 70HA Cl 48

Cl 50 0 65 .59 17.28 30.57 65 .00 18.28 29.89 -.59 . 99 -.68 1.34 70 HA Cl 50

C 1 52 0 65.72 16.33 30.37 65.23 17.23 29.68 -.50 .89 -.69 1.23 70HA Cl 5?

C21 3 0 65.34 16.84 29.74 64. e4 17.64 28.03* -.50 .80 -.90 X 1.31 70HM C21 3 C241 0 66.1 1 21 . 76 X 30.06 €5.46 22.76X 29.86 - .65 .99 -.20 X 1 .20 70HA C241

C253 0 65.23 17.26 30.09 €4. €2 1 8.28 29.43 -.62 1 . 02 -.66 1 . 36 70GC C25 3 C256 0 65.63 1

.ce 30.36 65.12 18.03 29.71 -.51 .97 -.65 1 . 27 70HM C256

C259 0 65.79 17.24 30.20 €5.19 18.19 29.50 -.60 . 95 -.70 1 .32 70HA C259

C2 6 2 0 44.54X 1 7.66 32.00X 43.84X 18.67 31 • 39X -.70 * 1 .01 -.61 1 .37 70HA C 26 2 C285 0 65.65 14.57 30.31 65.15 15.55 29.72 -.49 .99 -.59 1 .25 70HA C285

C288 0 65.72 16.41 30.42 €5.33 1 7.45 29. e3 - .40 1 . 04 -.59 1 . 26 70HA C2P8

C291 0 65.58 16. eo 30.17 €5.08 17.74 29.52 -.50 .95 -.65 1 .25 70HA C291

C31 7 0 65.37 17.52 29 .e4 €4.77 18.42 29.14 -.60 .90 -. _r 0 1 . 25 "*OHM C 31

C32 5 0 43.70X 17.76 3 1 • 45 X 43. 07X 18.80 3C.82X -.62 1 . 04 -.62 1 .36 70HA C“ 2 5 C352 0 65.66 15.93 30.52 65.22 16.88 29.92 -.45 .95 -.60 1 .20 70HA C352

C35 6 0 65.64 17.12 30.39 65.04 18.02 29.69 -.60 .90 -.70 1.25 70 HM C356

C382 0 65 .60 15.90 30.26 65.05 16.90 29. 61 -.55 1.00 -.65 1.31 70H A C38?

C41 "'A 0 64. e6 i6.ee 29.88 64.23 17.82 29.21 -.63 .94 -.67 1 .32 70GE C41 7A

C42 0 0 65.40 19. 03 30.53 64.95 19.92 29.83 -.45 .90 -.70 1 .22 70H A C420

C42 4 0 65.69 15.96 30.12 65.12 16.97 29.44 -.57 1 . 00 -.68 1 . 34 70CA C4’4

C44 0 0 65.50 17.51 3C .73 65.02 18.46 30.09 - .48 .95 -.64 1 . 24 70FA C440

C442 0 65. **7 16.68 30.54 €5.27 17.58 29.84 -.50 .90 -.70 1 . 25 70HM C4 4 2 C45 4 0 64 .47* 17.58 29.48* €3.90* 18.62 28.81 * -.58 1 . 04 -.67 1 . 37 7 OH A C454

C456 0 65.53 16.92 30.49 65.11 17. 82 29.86 -.42 .90 -.64 1.18 70H A C456

C4 5 8 0 65.68 17.12 30.25 65.15 1 8.06 29.59 -. c 3 .95 -.66 1.27 70HM C4 5 8 C47 5 0 65.26 18.70 29.99 64.62 19.68 29.29 -.63 .98 -.70 1 .36 70HA C4 7 5 C477 0 65.19 17.83 29.89 64.67 18.63 29.28 -.52 1 . 00 -.62 1 .25 70H A C477

C483 0 64.97 20.31« 29.93 64.47 21.10* 29.35 -.51 • 79 - .58 1.11* 70ZF C483

C494 0 65.62 16.93 30. C9 65.13 17.67 29.50 -.50 .74 * -.59 1 .074 70RA C494

CA9 8 0 65.15 16.23 30.51 64.60 17.23 29.92 -.55 1 . 00 -.60 1.25 70 HO C498

C499A 0 65.84 1 7 • 1 9 30. 38 €5.29 18.04 29.69 -.55 . 85 - .70 1 .23 70SC C499A

C499B X 65.14 17. 1C 2 5 .8 1

€5.24 17,88 25 . 22 X .10 X • ""8 -.59 • 5 ex 70SC C49 c R C506 0 65.82 17.24 30.32 €5.37 18.14 29.72: -.45 .90 -.60 1.17 7 0HA C?> 0 6

C51 4A 0 65.38 20.61* 30.06 €4.e6 21 .55* 29.35 -.52 .94 -.70 1.25 70GD Cfl 4A

C51 4B 0 66.28* 20.13« 2 0.31 €5.88* 21 . 04* 29.71 -.40 .90 -.60 1.16 70GX Cll 4R C53 8 0 67.85X 16.61 31 • 29 X €7 . 3 OX 17.51 3 0.5 ex -.55 .91 -.71 1 .28 70 GX C538

C54

0 64.65* 13.954 29.63* 64.21 14.72* 28.90* -.44 . 78 * -.73 1.15 70GP C5A1 C54 3 0 65.77 15.14 30.28 65.22 16.23 29.49 -.54 1 .09 -.79 • 1 .454 70SC C54 3 CS4 4 0 €5.64 17.56 30.20 65.04 18.46 29.55 -.60 .90 -.65 1 .26 70 HA C 54 4 C546A 0 64 .45* 18.16 29.82 €3.90* 19.16 29.12 -.55 1 • 00 -.70 1 .33 70H0 C546A

C546B 0 65 .3e 17.42 30.37 64.68 18.28 29.66 -.71 * . 8€ -.70 1 .32 70HM C5463

C54 7 0 64.79 17.48 30.04 64.25 18.44 29.38 - • 54 .95 -.66 1 .28 70H0 C 5 4 C550 0 65.37 15.75 30.43 65.02 16.59 29.79 -.35 * . 85 -.65 1.12 70H A CF 50 C5^6 0 65.25 14.97 30.67 €4.67 15.90 29.98 -.58 .93 -.69 1 .25 70HM C576

GRAND MEANS 65.45 17.11 30.21 €4.92 18.04 29. 56 -.53 .93 -.66 1.27

SD 0F MEANS

.39 1.22 • 29 • 41 1 .32 .31 .08 • 08 • 05 .08 INCLUDED LABS FOR IBIS MEAN

42 44 42 42 44 42 45 45 43 45

11
KEPeRT Ne. 22 kCCA CflLLABflRATI VF REFERENCE PReCJSAN

L, a, b SPACE ANALYSIS, ADJUSTED DATA C8L0E C0L8F DIFFERENCE

1977-1 978

LAB SAMFLE C81 SAMPLE C82 DIFFERENCE CP 2 - C8! INST CODE F MEAN L MEAN A MEAN B - MEAN L MEAN A MEAN R AL AA AR AE CODE 1 AH

Cl 0 5 0 34.87 -12.82 2.58 2 2.87 -13.62 2.29 -1 .00 . 20 -.30 1 .07 7 OHM Cl 06

C 1 2 1 A G 34.82 -13 .51 2.69 32.82 -13.71 ? . 44 -1 .00 . 20 - • 25 1 . 05 7 ON M c i r i .« Cl 48 e 34.91 -14.16 2.64 24. Cl -13.90 2.34 -.90 . 25 - . 30 .98 70HA CIA-’ Cl 50 G 35.14 -12.97 2.65 34.15 -13.71 2.21 - .95 . 25 -.34 t .07 7 OH A Cl 5 U Cl 52 G 35.09 -14.16 2.67 34.20 -1 3.96 2.47 -.85 .20 -.40 1 .CO 70H A Cl 5 2 C213 G 34.88 -12.82 2.62 34.48 -1 2.73X 2.22 - . 40 X 1 . 1 C X -.30 1 . 21 * 7 OH M 021 2 C24 1 G 34.77 -12.67 2.63 33.97 -13.72 2.18 -. 79 05 X - .45 * .91 70PA C24 1 C253 G 34.79 -13.82 2.63 33.95 -13.59 2.23 -.54 . 23 -.30 1 . 01 7 OGC C25 3 C256 G 34.95 -14. C7 2.84 33.98 -13.87 2.52 - 1 . 01 .20 -.31 1 .07 7 OH M C?5r

C255 G 34. e2 -12.89 2.81 34 . 07 -13.58 2.41 -.75 • 30 - .40 .90 7 OH A CT> 5 c

C262 X 12 . 9 ex -17 .£ 3X 2.82 1 2.40X — 1 7 . 40 X 2.40 - .56 X . 1 3 -.42 • 7 1 X "OHA C 262

C285 e 35.58X -12.39* 3.79X 35.19X -1 2.99* 3.49X - . "*9 .40 • -.30 .93 ’’OH A C285

C28 8 G 34.59 -1 3.93 2.45 34.20 -13.58 2.10 - # "»o . 35 -.35 . 93 70 K A C?P8

C251 G 34 .91 -13.75 2.75 24.01 -13.59 2.35 - .50 .20 - . 40 1 .00 "OHA C 25 1 C317 G 34 . *74 -12 .e7 2.55 22.74 -13.62 2.14 -1 .00 .25 -.40 1 . 11 -OHM C31 7

C325 G 1 3.08X -1 7.67X 2.29* 1 2.46X -1 7.66X 2.88 -.62 X .21 - • 42 . 78* 7 OH A 032 5 C35 2 e 34.97 -14.04 2.57 34.18 -13.74 2.27 -.60 . 30 -.70 .90 70F * C"52

C3 5 6 0 34.77 -13.71 2.48 33.87 -13.50 2.08 - .90 .20 -.40 1 .01 70 H M C 35c C382 G 35. CC -14.11 2.47 24.00 -1 3.81 2.17 -1 .00 . 30 -.30 1 .09 7 0 H A C782

C41 7 A 0 24.65 -12.92 1 .65 33.84 -13.56 1 .45 -.86 .36 * -.41 1 .02 ’’CGF C* 1 "A

C4 2 0 e 25.34 -14.27 1 .79 34.54 -14.07 1 .49 -.80 .20 -.30 .87 "OHA Cu 20 C424 0 35 .5 6* - 12 . eo 2 . C3 34.57 -13.56 1 .73 -1 .01 .25 -.31 1 . 08 70CA C42 4 C440 0 35.10 -14 .22 2.82 24.27 -1 3.97 2 . 49 -.83 . 25 -.33 .93 -OHA C«4 0 C442 0 34 .e4 -13.96 2.15 32.94 -13.66 1 .75 -.90 .30 -.40 1 .03 70 H M C442

C454 0 24. 7C -13.53 2.01 33.92 -12.23 1 .69 -.79 .30 -.32 • 9 C 70H A C 454

C4 56 G 35.00 -13.96 2.56 34.17 -13.70 2.23 -.82 .26 - .33 .9 2 -OHA C456

C458 0 24.86 -13.64 2.26 22.95 -1 3.66 1 .95 -.93 . I 3 -.30 1 .00 70 H M c«.se C475 G 26.23 -13.52 1 .75 24. 3e -13.72 1 . 41 -.85 .19 -.3? .94 "’OHA C47 = C47 7 G 25.25 -13.91 1 .95 24.47 -13.68 1 .64 -.78 .23 -.31 .87 70H A C47-

C483 G 25.61* -14.26 2.47 34.75* - 1 4.40* 2.32 -.86 -.04 X -.15 X . 97 — 07 F C4 8

*

C4 9 4 0 34.95 -14.06 2.00 24.15 -1 2.81 1 .65 -.84 . 25 -.35 .95 "OHA C4 94 C458 0 24.29* -13.44* 1.61* 22.30* -13.33 1 . 31 * -1 .00 . 1 0 • -.70 1 . 05 70HG C49e

C49 5 A G 34 .72 -14.14 2.39 23.92 -1 2.88 2 . C9 - .80 . 25 -.30 .89 70SC C 49 9

C459B 0 34.27 -15.60X 2 • 5 e 33.37* - 15. 41

2.47 -1 .00 .19 -.11 X 1.03 "OSC C499R

C506 0 25.02 -13.95 2.76 24 . 03 -12.75 2.40 -1 . 00 . 20 • -5 C i . CH "OF A C5 0 6

C51 4 A 0 25.21 -14.39* 2. e2 24.32 -14.09 2.50 -.89 .30 . .9 9 70GP C c

1 4A

C51 4 B 0 35.40 -11 • 87X - . C 8 X 24.50 -11 • 62X - .38X -.00 . 25 -.30 .98 7 OCX CE1 4B C53 8 0 36.47X -13.03X • 9 4 X 25.56X -1 2. 83X • 59X -.91 .20 - • 35 .99 70CX cs^e

C54

0 33.54X -12.45* 2.21 32.67X -13.11* 2.72 -.07 . 34 -.49 X 1 . 06 70CP C54 1 C543 0 34.99 -13.85 2.64 34.10 -13.70 2.34 -.89 . 20 -.30 .9f 70SC C5 4 3

C54 4 0 34.97 -14.16 2.82 34.17 -13.96 2.52 -.80 . 20 - .30 .88 7 OH A C 5 4 4 C546A 0 24.10* -12.67 1 .71 33.30* -13.42 1 .41 -.80 .25 - . 30 . 89 "OHO C546A

C546B 0 24 .e6 -12.52 2.76 32.90 -1 3.67 2 . 46 - .96 . 25 -.31 1 • C 4 "OHM C546P

C5 4 7 0 24.56 -13.73 1 .80 33.71 -13.44 1 .48 -.05 .29 -.33 .95 "OHO 0947

C55 0 0 34.78 -14.06 2.72 33.98 -1 3.75 2.42 -.80 . 30 -.30 .90 7 OH A CSS 0 C57 6 0 24 .65 -13 .57 2.76 33.79 - 13.71 2.44 -.36 .26 -.3? .95 ’OHM C5-6

GRAND MEANS 34.52 -13.92 2.47

SD OF MEANS

.30 .23 .41 INCLUDED LAES FeR THIS MEAN

41 41 42 41

-i3.ee

• 2 e

40

2 .1 4

.40

42

. 08

43

. 25

. 06

42

. 33

. 04

42

.98

.08

12
NBS VALUES FOR SPECTRAL REFLECTANCE

45% REFLECTANCE FACTOR SAMPLES C79 , C80, C81 , C82, WIT

WAVELENGTH (NM) C79 C80 C81 C82 Wll

380 .0838 .0850 .0580 .0570 .1312 390 .1114 .1134 .0711 .0689 .2256 400 .1343 .1368 .0817 .0786 .4415 410 .1395 .1420 .0859 .0825 .7123 420 .1379 .1402 .0881 .0847 .8607 430 .1367 .1389 .0910 .0874 .8999 440 .1376 .1396 .0950 .0914 .9028 450 .1391 .1411 .1002 .0966 .9122 460 .1411 .1429 .1092 .1055 .9161 470 .1436 .1456 .1260 .1254 .9195 480 .1452 .1468 .1464 .1410 .9232 490 .1459 .1471 .1606 .1545 .9259 500 .1558 .1563 .1653 .1588 .9285

510 .1965 .1949 .1646 .1579 .9302 520 .2497 .2427 .1615 .1545 .9320 530 .2678 .2565 .1564 .1494 .9331 540 .2868 .2736 .1493 .1421 .9340

550 .3644 .3497 .1395 .1322 .9342 560 .4957 .4836 .1273 .1201 .9343 570 .5907 .5833 .1140 .1072 .9354 580 .6263 .6222 .1005 .0942 .9358

590 .6382 .6350 .0866 .0812 .9364 600 .6423 .6394 .0750 .0705 .9362 610 .6431 .6403 .0681 .0644 .9361 620 .6424 .6401 .0649 .0616 .9359 630 .6418 .6393 .0633 .0603 .9358 640 .6409 .6385 .0623 .0594 .9366 650 .6402 .6375 .0617 .0590 .9368 660 .6390 .6365 .0626 .0599 .9358 670 .6380 .6351 .0650 .0621 .9342

680 .6369 .6345 .0679 .0647 .9344

690 .6360 .6335 .0707 .0672 .9353

700 .6350 .6322 .0727 .0691 .9358

710 ,6338 .6310 .0729 .0692 .9352

720 .6329 .6303 .0712 .0677 .9355

730 .6322 .6286 .0708 .0674 .9356

740 .6316 .6280 .0738 .0704 .9355

750 .6306 .6272 .0794 .0755 .9357 760 .6297 .6269 .0841 .0800 .9367

770 .6289 .6258 .0859 .0816 .9365

NBS TRISTIMULUS VALUES

45/0 REFLECTANCE FACTOR SAMPLES C79, C80, C81 , C82, Wll

X, Y, Z SPACE

C79 C80 C81 C82 Wll

X 48.608 48.258 9.230 8.765 91.174

Y 43.549 42.897 12.201 11.600 93.440

Z 16.935 17.149 13.180 12.679 107.078

L, a, b SPACE

C79 C80 C81 C82 Wll

X 65.992 65.496 34.930 34.059 96.664

Y 15.994 16.903 -13.960 -13.666 -.801

Z 30.984 30.328 2.087 1.777 2.011

13
100

90

80

70

60

! 50

40

30

20

lO

0

SPECTROPHOTOMETRIC CURVES OF

COLOR AND COLOR DIFFERENCE NO. 22 SAMPLES

W-.LI

'

' ' rL

/

Thi

Herr

s pi C imendi

t prov

nger C ided

,olor

courte

Labora

sy of

tory.

I —

1

/

I

1 I

|

/

l 1 /

L_

c -79 / j

A

1 C-80

/ 1

r

1

g

C' 81 1 — i -^1 z: 7 V

1

C-82

1 —

_

— 1

1

400 440 480 520 560 600 640 680

WAVELENGTH (NANOMETERS)

14
NBS-1 14A (REV. 7-73)

u.s. DEPT, of COMM. i. PUBLICATION OR REPORT NO. BIBLIOGRAPHIC DATA

sheet MCCA CRP Color 22

2. Gov’t Accession

No.

3. Recipient’s Accession No.

4. TITLE AND SUBTITLE: Manufacturers Council on Color and Appearance

Collaborative Reference Program, Color and Appearance

Report No. 22, Color and Color Difference

5. Publication Date 3/8/78

6. Performing Organization Code

7. AUTHOR(S)

J. Horlick, J. Stevenson

8. Performing Organ. Report No. NBSIR 78-1333

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, D.C. 20234

10. Project /Task/Work Unit No. 4015578

11. Contract /’Grant No.

12. Sponsoring Organization Name and Complete Address (Street, City, State, ZIP)

Collaborative Testing Services, Inc., 9241 Wood Glade Drive,

Great Falls, VA 22066; and Manufacturers Council on Color

and Appearance.

13. Type of Report & Period Covered

Final

14. Sponsoring Agency Code

15. SUPPLEMENTARY NOTES

16. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant

bibliography or literature survey, mention it here.)

Collaborative Reference Programs provide participating laboratories with the means for checking periodically the level and uniformity of their testing in

comparison with that of other participating laboratories. An important

by-product of the programs is the provision of realistic pictures of the state

of the testing art. This is one of the periodic reports showing averages for

each participant, within and between laboratory variability, and other information for participants and standards committees.

17. KEY WORDS (six to twelve entries; alphabetical order; capitalize only the first letter of the first key word unless a proper name; separated by semicolons

)

Collaborative reference program; Color; Laboratory evaluation; Precision;

Reference samples; Testing calibration.

18. AVAILABILITY Unlimited 19. SECURITY CLASS

(THIS REPORT)

21. NO: OF PAGES

For Official Distribution. Do Not Release to NTIS

UNCL ASSIFIED 19

Order From Sup. of Doc., U.S. Government Printing Office Washington, D.C. 20402, SD Cat. No. Cll

20. SECURITY CLASS

(THIS PAGE)

22. Price

1

1 Order From National Technical Information Service (NTIS)

Springfield, Virginia 22151 UNCLASSIFIED

USCOMM-DC 29042-P74
.

' '

.