JlfelfL 7 /33; MCCA

MANUFACTURERS COUNCIL ON COLOR AND APPEARANCE

COLLABORATIVE REFERENCE PROGRAM

COLOR AND APPEARANCE

RETROREFLECTANCE

REPORT NO. 4

U.S. 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 resistence

Grammage

Smoothness

Surface pick strength

K & N ink absorption

PH

Opacity

Blue reflectance (brightnes

Specular gloss, 75°

Thickness

Concora (flat crush)

Ring crush

FKI KRAFTBOARD (48 times per year)

Mullen burst of linerboard

Concora test of medium

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 Bldg.

National Bureau of Standards

Washington, D.C. 20234

iem

saa9
MANUFACTURERS COUNCIL ON

COLOR AND APPEARANCE

COLLABORATIVE REFERENCE PROGRAM

FOR

COLOR AND APPEARANCE

RETROREFLECTANCE

J. Horlick

Standards Application and Analysis Division

Institute of Applied Technology

J. Stevenson

CTS - NBS Research Associate

U. S. DEPARTMENT OF COMMERCE

National Bureau of Standards

NBSIR 78-1332

Introduction

Sample sets of retroref lective road-sign sheeting material were

sent to 18 laboratories participating in this Collaborative

Reference Program. The sample set consisted of two specimens

each of silver sheeting and of orange sheeting. Ten laboratories returned data taken in accordance with Federal

Specification L-S-300 (A or B) or a close modification

thereof, and two laboratories followed "other" methods.

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

report in general, please contact Jeff Stevenson or Jeffrey

Horlick on (301) 921-2946.

March 6, 1978
TABLE OF CONTENTS

Key to Tables and Graphs

Silver and Orange Sheeting for

-4° Entrance and 0.2° Observation

Silver and Orange Sheeting for

30° Entrance and 0.2° Observation

Silver and Orange Sheeting for

-4° Entrance and 2.0° Observation

Silver and Orange Sheeting for

30° Entrance and 2.0° Observation

Percent Difference between Laboratory Means

and Grand Means
KEY TO TABLES AND GRAPHS

MEAN - The average of individual TEST DETERMINATIONS. The

number of TEST DETERMINATIONS in the mean is given

in the upper right corner of the first table (TEST D.)

and again at the bottom of this table.

GRAND MEAN -

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

laboratories flagged (see column F) with an X or //.

DEV - The DEViation of difference of the laboratory MEAN from

the GRAND MEAN.

N. DEV - The Normal DEViate or ratio of the DEV to the SD OF MEANS

an indication of the degree of divergence of the laboratory MEAN from the GRAND MEAN.

INST CODE - Code for instrument type or variation in condition, see second table.

F - Flag, with following meaning:

# - Excluded because data were not understood or because

X -

analysis indicated extreme performance values or non- compliance with required test procedures.

Excluded because plotted point would fall outside of the

99% error ellipse, (see below for explanation of Graph).

* _ Included in grand means but plotted point would fall

outside of the 95% error ellipse.

0 - Included in grand mean and inside 95% error ellipse.

Graph - For each laboratory the MEAN for the second sample is

plotted against the MEAN for the first sample, with each

point representing a laboratory. The horizontal and

vertical lines are the GRAND MEANS. The dashed line is

drawn at 45°. The solid sloping line, which may or may

not lie close to the 45° line, is along the major axis

of the error ellipse. The ellipse is drawn so that, on

the average, it will include 95% of the points representing the laboratories.

Plotted symbols are as explained above (under F). A

participant whose plotted point falls outside of the

ellipse or the rectangular area should carefully re- examine the testing procedure he is following.

Note: Graphs are plotted with an ellipse when there

are 20 or more instruments in the analysis.

1
REPORT NO . 4 MCCA COLLABORATIVE REFERENCE PROGRAM ANALYSIS C72-1 TABLE 1 RETROREFLECTANCE

LAB SAMPLE

SOI SILVER AT -4, .2 DEGREES SAMPLE

001 ORANGE AT -4. .2 DEGREES TEST D. - 4 CODE MEAN DEV N. DEV SDR R. SDR MEAN DEV N.DEV SDR R.SDR VAR F LAB

C2 00 127.3 12.7 1 .76 1.3 .52 45.5 3.2 .92 . 1 .19 72A O C200

C428 115.5 .9 • 12 3.5 1 • 44 41 .0 -1.4 -.40 1.2 2.27 72A a C428

C462 114.2 - .5 - .C6 1 .2 . 47 43.6 1.3 .37 • 4 .72 72 A o C462

C471 118.5 3.9 .54 1 .1 . 44 46.2 3.8 1.11 .6 1 .22 72C 6 C47

C4 8 0 110.2 -4.4 - .61 2.1 . 86 42.8 .5 . 1 3 .5 1 .06 72A 0 C480

C481 107.9 -6.7 -.93 6.2 2.55 38.3 -4.

-1.19 • 1 .23 72A 0 C481 C486 119.7 5.1 .71 1 .5 .62 43.1 .7 • 21 .0 .00 72A 0 C486

C488 111.0 -3.6 -.50 • 8 . 34 43.5 1 • 1 .33 .6 1.13 72C 0 C488 C490 101.1 -13.6 -1 .88 7.1 2.91 37.3 -5. 1 -1.48 1 .

2.95 72 A o C490

CS 07 119.1 4.5 .63 1 .0 .40 46.3 5.9 1.73 . 0 .00 7 2A a C5C7

C522 108.9 -5.8 -.80 1.6 .67 40.8 -1.6 -.45 • 1 • 28 72A e C522

C52 3 122.0 7.4 1 . 03 1 .9 .77 37.9 -4.4 l fO QD 1.0 1 .96 72A a C533

GR. MEAN - 1 1 4. e CP/FT-C/SQFT GRAND MEAN • 42.4 CP/FT-C/SQFT TEST DETERMINATIONS - i SD MEANS • 7.2 CP/FT-C/SQFT SD OF MEANS - 3.4 CP/FT-C/SQFT 12 LABS IN GRAND MEANS AVERAGE SDR 2.4 CP/FT-C/SQFT AVERAGE SDR - .5 CP/FT-C/SQFT

TOTAL NUMBER OF LABORATORIES REPORTING - 12

MCCA COLLABORATIVE REFERENCE PROGRAM

ANALYSIS C72-1 TABLE 2 RETROREFLECTANCE

LAB MEANS COORDINATES AVG

CODE F SOI 001 MAJOR MINOR R. SDR VAR PROPERTY— -TEST INSTRUMENT- --CONDITIONS

C4 9 0 0 101.1 37.3 -14.5 -.9 2.93 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C4 81 0 1 07.9 38. 3 -7.6 -1.9 1.39 72A RETROREFLECTANCE. METHOD LS300A OR LS300B

C522 0 1 08.9 40.8 -6.0 • 2 .47 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C480 o 110.2 42.8 -4 .

1.7 .96 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C488 0 111.0 43.5 -3.1 2.2 .73 72 C RETROREFLECTANCE. METHOD AND INSTRUMENTAL] C462 0 1 14.2 43.6 - . 1 1.3 .60 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C42 8 0 115.5 41 .0 .4 -1.6 1 . 85 72A RETROREFLECTANCE, METHOD LS300A OR LS3C0B

C4 71 0 1 ie.5 46.2 4.8 2.5 .83 72 C RETROREFLECTANCE. METHOD AND INSTRUMENTAL]

C5 07 0 119.1 48.3 6.1 4 .

.20 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C4 86 0 119.7 43.1 5.1 -.8 .31 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C53 3 0 122.0 37.9 5.8 -6.4 1 . 37 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C200 0 127. 3 45.5 13.1 -.7 .36 72 A RETROREFLECTANCE, METHOD LS300A OR LS3C0B

GMEANS: 114.6 42.4 1 .00 95% ELLIPSE: 22.6 8.3 * ITH GAMMA • 17 DEGREES

2
SRMPLE

001

RETR0REFLECTRNCE

SAMPLE SOI = 115. CP/FT-C/SQFT SAMPLE 001 = 42

70-i 1 1 1 1 1 ^ L CP/FT-C/SQFT

I I L

65-

60

55-

50-

45-

+.X.« NOT IN GRAND MEANS

ANALYSIS C72-1

O 0 ©

o

40-

35-

30-

25

20 -

15-

o

o

85 90 95 100 105 1 10 1 15 120 125 130 135 140

SAMPLE SOI

3
REPORT NO. 4 MCCA COLLAEORAT I VE REFERENCE PROGRAM

ANALYSIS C72-1 TABLE 1 RETRO REFLECTANCE

LAB SAMPLE

S02 SILVER AT 30. •2 DEGREES SAMPLE

002 ORANGE AT 30, .2 DEGREES TEST D. 4

CODE MEAN DEV N.DEV SDR R. SDR MEAN DEV N.DEV SDR R.SDR VAR F LAB

C2 0 0 56.07 10.24 1.36 1 .72 .52 26.87 2.69 1.26 .25 .43 72A e C200

C42 8 47.75 1.92 .25 5.12 1. 56 23.50 - .69 -.32 .58 1 .00 72 A 0 C428

C462 53.95 8.12 1 . C8 2.65 .87 25.55 1.36 .64 • 24 • 41 72A 0 C462

C47 1 45.25 - .se - .08 2.83 . 86 24.60 .41 .19 .94 1.63 72C 0 C47

C4 80 42.10 -3.73 -.50 2.13 .65 25.52 1.34 .63 • 62 1 .08 72 A a C480

C4 81 50.71 4.88 .65 4.91 1.49 24.59 .40 .19 .97 1.68 72 A 0 C481 C486 £4.11 8.28 1.10 3.70 1.12 23.60 -.59 -.28 .35 .60 72A a C4 86 C48 8 45.00 -.83 -.11 4.08 1.24 24.00 -.19 -.09 .00 • 00 72C a C488

C49 0 35. 4fi -1 0.35 -1.37 4 .37 1.33 19.75 -4.44 -2.08 .91 1 .58 72A a C490

C507 47. 07 1.24 .17 2.49 .76 27.25 3.06 1 .44 .87 1.50 7 2A a C507

C52 2 41 .22 -4.61 -.61 2.56 • 7 8 21 . 25 -2.94 -1.38 .10 .17 72A 0 C522

CS3 3 31.25 -14.58 -1 .94 2.72 . 83 23.75 -.44 -.20 1.11 1 .92 7 2A e C533

GR. MEAN

SD MEANS

- 45.83

«

"T

• 5 3 CP/FT -C/SQFT

CP/FT-C/SQFT

AVERAGE SDR - 3.29

GRAND MEAN - SD OF MEANS - CP/FT-C/SQFT

24. 19 2.13 CP/FT-C/SQFT

CP/FT-C/SQFT

AVERAGE SDR -

TEST DETERMINATIONS - 12 LABS IN GRAND MEANS

.58 CP/FT-C/SQFT

TOTAL NUMBER OF LABORATORIES REPORTING • 12

REPORT Ne, 4 MCCA COLLABORATIVE REFERENCE PROGRAM

ANALYSIS C72-1 TABLE 2 RETRO REFLECTANCE

LAB MEANS COORDINATES AVG CODE F S02 002 MAJOR MINOR R.SDR VAR PROPERTY— -TEST INSTRUMENT- --CONDITIONS

C53 3 0 31.25 23.75 -14.45 1 .98 1.37 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C490 0 35.48 19 .75 -10.94 -2. 67 1.45 72 A RETRO REFLECTANCE. METHOD LS300A OR LS300B

C522 0 41.22 21 .25 -5.03 -2. 14 .48 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C4 8 0 e 42.10 25.52 -3.46 1 .94 .86 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C48 8 e 45.00 24.00 -.85 -.05 .62 72 C RETROREFLECTANCE, METHOD AND INSTRUMENTATION

C4 71 0 45.25 24.60 -.51 .50 1.24 72 C RETROREFLECTANCE, METHOD AND INSTRUMENTATION

C507 0 47.07 27.25 1 . 73 2.82 1.13 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C4 2 8 0 47.75 23.50 1 . 78 -.99 1.28 72A RETROREFLECTANCE. METHOD LS300A OR LS300B

C4 81 0 50.71 24. 59 4. ee -.41 1.59 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C4 62 0 53.95 25.55 8. 23 .00 .64 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C486 0 54.11 23.60 8.07 -1.95 .66 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C2 0 0 0 56.07 26.87 10.55 .96 • 48 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

GMEANS45.83 24.1 9 1 .00 95% ELLIPSE

22.93 £.23 WITH GAMMA • 9 DEGREES

SPECIFIED SPECIFIED

4
SAMPLE

002

RETR0REFLECTRNCE

SAMPLE S02 = 45 .8 CP/FT-C/SQFT SAMPLE 002 = 24.2 CP/FT-C/SQFT

I I I I i i-r 1 1 1 L

50

45 -

40 -

35 -

30

25

+.X.« NOT IN GRAND MEANS

ANALYSIS C72-1

-#

20 -

15 -

10 -

5

-

15 20 25 30 35

* “I r n r 40 45 50 55 60 65 70

SAMPLE S02

75

5
REPORT NO. 4 MCCA COLLAEORAT I VE REFERENCE PROGRAM

ANALYSIS C72-1 TABLE 1 RETROREFLECTANCE

LAB CODE

SAMPLE

S 0 3 MEAN

SILVER A T -4,2. DEGREES SAMPLE ORANGE AT -4,2. DEGREES

eo3 DEV N.DEV SDR R. SDR MEAN DEV N.DEV SDR R. SDR

TEST D.“ VAR F

4 LAB

C20 0 5.35 .18 .47 .06 .41 C42 8 5.15 -.02 -.06 .17 1.23

C46 2 £ .50 .33 .87 .00 . 00 C471 5.72 .55 1 .47 .15 1.07

C4 8 0 4.77 -.41 -1 .08 .13 .96

C4 81 4.97 -.20 - .53 .33 2. 35 C490 4.54 -.63 -1 .68 .24 1 . 68

C5 07 5.45 • 26 .74 .10 .71 C522 5.10 -.07 - .20 .08 . 58 C52 3 13.05 7.66 21.02 .26 1.68

GR. MEAN - 5.17 CP/FT-C/SQFT GRAND MEAN - SD MEANS - .37 CP/FT-C/SQFT SD OF MEANS - AVERAGE SDR - .14 CP/FT-C/SQFT

TOTAL NUMBER OF LABORATORIES REFORT ING - 10

2.70 .37 1.19 .00 .00 72A O C2C0

2.12 -.21 -.67 .05 .48 72 A 0 C428

2.50 .17 .55 .23 2.23 72A 0 C462

2.60 .27 .87 • 12 1.12 72C a C47

2.23 -. 1 0 -.31 .15 1 .48 72A o C480

2.10 -.23 -.75 .00 .00 7 2A 0 C481

1 . 85 - .48 -1.56 .17 1 .68 72A a C490

2.72 . 39 1.27 .15 1 .45 72A 0 C507

2.15 -.18 -.59 .06 .56 72A 0 C5 22 2.85 .52 1 . 68 .06 .56 72A a C533

2.33 CP/FT-C/SQFT TEST DETERMINATIONS 4 .31 CP/FT-C/SQFT 9 LABS IN GRAND MEANS AVERAGE SDR - .10 CP/FT-C/SQFT

REPORT Ne. 4 MCCA COLLABORATIVE REFERENCE PROGRAM ANALYSIS C72-1 TABLE 2 RETROREFLECTANCE

LAB MEANS COO ML I NAT E S AVG CODE F S03 003 MAJOR M INOR fi. SDR VAR PROPERTY— -TEST INSTRUMENT---CONDITIONS

C490 0 4.54 1 . 85 -.79 .01 1 .68 7 2A RETROREFLECTANCE. METHOD LS300A OR LS300B

C480 0 4.77 2.23 -. 38 . 18 1.22 72 A RET ROFEF LECTANCE

METHOD LS300A OR LS300B

C4 81 o 4.97 2.10 -. 30 -.06 1.18 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C5 22 0 5.10 2.15 -. I 7 -.10 .57 72 A RETROREFLECTANCE, METHOD LS300A OR LS300H

C428 0 5.15 2.12 -.15 -.15 .86 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C200 0 5.35 2.70 . 37 .18 .21 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C5 07 0 £.45 2.72 .46 • 14 1.08 72 A RETROREFLECTANCE, METHOD LS300A Ok LS300B

C462 0 5.50 2.50 . 36 -.07 1.12 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C471 0 5.72 2.60 .60 -. 13 1.09 72 C RETROREFLECTANCE, METHOD AND INSTRUMENTATION

C533 * 13.05 2.85 6.49 -4.50 1 .22 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B GMEANS

5.17 2.33 1 .00 95% ELLIPSE

1 .54 .43 WITH GAM MA - 38 DEGREES

SPECIFIED

fi
SAMPLE

003

RETR0REFLECTANOE

SAMPLE SCT3 = 5-17 CP/FT-C/SQFT SAMPLE 003 = 2.33 CP/FT-C/SQFT

3.8

3.6-

3.4-

3.2-

3.0

2.8

2 . 6

-

2.4-

+ . X . ** NOT IN GRAND MEANS

ANALYSIS C72-1

2.2-

2.0-

1 . 8

-

1 .6

1 .4

1 - 2-1

1 .0

3.8 4.0 4.2 4.4 4.6 4.8 S.O 5.2 5.4 5.6 5-8 6.0 6-2 6.4 6.6

SAMPLE S03

7
REPORT Ne. 4 MCCA COLLABORATIVE REFERENCE PROGRAM ANALYSIS C72-1 TABLE 1 RETROREFLECTANCE

SAMPLE SILVER AT 30, 2. DEGREES SAMPLE ORANGE AT 30, 2. DEGREES TEST D. - 4 LAB S 04 004 CODE MEAN DEV N.DEV SDR R. SDR MEAN DEV N.DEV SDR R. SDR VAR F LAB

C2 0 0 4.90 .13 .37 .12 .75 2.12 . 09 .23 .05 .45 7 2A 0 C2C0

C42 8 4.70 -.07 -.18 .18 1. 19 1 .75 - .29 -.80 .06 .52 72 A e C428

C462 5.15 .38 1.C6 .10 . 65 2.50 .46 1 .27 .23 2.10 72A e C462

C471 5.17 .41 1.13 .05 . 33 2.15 • 1 1 .30 .06 .52 72C a C471 C480 4.26 -.49 -1.35 .22 1 .42 1 .70 -.34 - .94 .10 .90 72 A 0 C480

C48 1 4.77 .01 .02 .15 .98 1 .90 -.14 -.38 .16 1.48 72A 0 C481 C490 4 . 06 -.70 -1.94 • 12 . 81 1.52 -.51 -1 .42 .15 1 .36 72 A a C490

C5 0 7 5 .CO .23 .64 .16 1 . 07 2.27 • 24 .65 .05 .45 72 A 0 C507

C522 4.65 -.12 -.32 .13 . 84 1 .82 -.21 -.59 .05 .45 72 A 0 C522 C533 4.97 .21 .58 .30 1. 95 2.65 .61 1.68 .19 1 .74 72A 6 C533

GR. MEAN - 4.77 CP/FT-C/SQFT GRAND MEAN - 2.04 CP/FT-C/SQFT TEST DETERMINATIONS

SD MEANS - .36 CP/FT-C/SQFT SD OF MEANS - .36 CP/FT-C/SQFT 10 LABS IN GRAND MEANS AVERAGE SDR - .15 CP/FT-C/SQFT AVERAGE SDR •

• 11 CP/FT-C/SQFT

TOTAL NUMBER eF LAEeEAleSIES E EF68 1 ING • 10

REPORT NO. MCCA COLLABORATIVE REFERENCE PROGRAM ANALYSIS C72-1 TABLE 2 RETROREFLECTANCE

LAB CODE F MEANS

S04 004 COORDINATES

MAJOR MINOR

AVG

R. SDR VAR PROPERTY TEST INSTRUMENT- --CONDITIONS

C4 9 0 0 4.06 1.52 -. 86 . 1 3 1 .09 72 A RE TROFBF LECTANCE, METHOD LS300A OR LS300B

C4 8 0 0 4.28 1 . 70 -.59 .1 1 1.16 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C52 2 0 4.65 1 .82 -. 23 -.07 .65 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C428 0 4.70 1 .75 -.25 -.16 .86 72A RETROREFLECTANCE. METHOD LS300A OR LS300B

C481 0 4.77 1 .90 -.09 -.10 1.23 72A RETROREFLECTANCE, METHOD LS300A OR LS300B

C2 0 0 0 4.90 2.12 . 15 - .03 .60 72 A RETROREFLECTANCE, METHOD LS300A OR LS300B

C53 3 0 4 .97 2.65 . 58 • 28 1.85 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C5 07 0 5.00 2.27 .33 .00 .76 72 A RETROREFLECTANCE. METHOD LS300A OR LS300B

C4 62 0 5.15 2.50 .60 .05 1.38 72 A RETROREFLECTANCE. METHOD LS300A OR LS3C0B

C471 0 5.17 2.15 .37 -.21 .43 72C RETROREFLECTANCE. METHOD AND INSTR UMENTATI GMEANS: 4.77 95% 2.04

ELLIPSE: 1 . 56 . 47 1.00 %ITH GAK'M A - 45 DEGREES

8
SAMPLE

004

RETR0REFLECTRNCE

SAMPLE S04 = 4.8 CP/FT-C/SQFT SAMPLE 004 = 2.0 CP/FT-C/SQFT

3.4 -J L_

3.2

3.0

2 . 8

-

2 . 6

-

2.4-

2 . 2

-

2.0-

1 . 8

-

1 .6

+ .X .« NOT IN GRAND MEANS

ANALYSIS C72-1

1 .4

1 . 2

-

1 . 0

-

0 . 8

-

0 .6

3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5-2 5.4 5.6 5.8 6.0 6.2

SAMPLE S04

a
PERCENT

DIFFERENCE

BETWEEN

LABORATORY

MEANS

AND

GRAND

MEANS

a) CM CNJ in iD O' 00 o

oo o o CTi CN

m CO vO oo 1 i <r CM CTN

d

O o • i • • • 03 o • CNJ CO CM m vD > 1 i m 1 1 o O'

»-i CO CN t—

CM rH 1 CM r—

1—

CM

O i 1 i 1

(-1 CO O' 00 CM CNI CTx

<u

O <3- 03 CO CM

O 1 1 00 00m rH > o o • 1 • • • r—

•H

CO

30 CM

*<r CM rHi 00 . o

r—

1 O 1 -14 CM1

<yOOdduo

CO 00 iH O' & O'

O CO cn CM

O o co 00 o CM m CM oo 1 1 CO rH o o • 1 • • • <r • CM LO CTi rH <r CT> 1 1 O vD CM i CM tH 1 rH i 1 CM rH t CM X

cn

cn

CO 03 CM rH 00

O lO rH

a) 00 CO rH r- CM rH vO o 00

m o 00 > o o • • rH o CM m CN Mf rH 00 o 00 rH CM CM o rH

•H CO • CM rH i 1 rH rH i CM rH CO

V-J 00 03 00 03 CM

m CM ho

a) o rH <3- CO CO 30 00 1 1 1—1 <3- CO <r

d > o o • • 1 • • •

cfl rH • LO CO 1 ID o CO 1 1 CM in rH CM i-i •H 1 CM »H i 1 rH i m o

CD 03 00

m CM 03 o in <r 03mm in CM

00 rH o 00 30 30

m iD <3* CO 30 rH 00

d o O • 03 o CM <r rH CM

m «H

m rH CM i 00 CM CM rH

M CO • CN rH 1 1 rH rH rH i owoSw

as 1) rH o CO vD r- m O' CM CM rH w

00 CO CO 00 O' O' lO 30

m o ON 30 (H

d o o • • • 0) MT CM CM CO CM 00 On rH CM CM CO CO O

M

M 1 • i i rH rH 1 rH o

>-l 00 O'

m o Mfm

at 30 o CO <3- 00 00 > 0 o • rH CN rH i co CO m<r

oo

r^. coi

co

CT> rO'

<ri

in

'3’ vD

H

55w

CJ

aSw

Oj

a) a) CJ <0 00 CJ CD d 0) w 0) d c rH a) i—

s T)

•H a) 00 00 00 o o 00 CN rH o rH 00 o r-*- CM CO

4-1 X)

d 1-4

d

Q tj o CN vO 00 00 00 00 O' o CM co

cu •H <S a) < CM Mf *<r vj <3- <r <r <r

m in in

a) CJ > -D CJ o O o uO o V

V o u

u

-d

d •H o2 cfl C/3 M Q o hJ

10
NBS-1 14A (REV. 7-73)

U.S. OEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. MCCA Retroref lectance No. 4

2. Gov’t Accession

No.

3. Recipient’s Accession No.

4. TITLE AND SUBTITLE

Manufacturers Council on Color and Appearance

/./"xt t . nAn . TTiir T7T7T7T7T>T?vr/->l? DDnrDAU PM ftB A MD A T>P P A D ANPT?

5. Publication Date 3/6/78

LULLfujU]\n 1 1 V L J\ijr r i\uvji\auj wwtv ^

Retroref lectance, Report No. 4

6. Performing Organization Code

7. AUTHOR(S)

J. Horlick, J. Stevenson

8. Performing Organ. Report No. NBSIR 78-1332

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

13. Type of Report & Period Covered

Final

and Appearance. 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; Gloss; Laboratory evaluation; Precision;

Reference samples; Testing calibration.

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