A11107 365130 CONTAINER

BOARD

report no. 127

vi'lsSi'R. So-1836 • 198(

NBS Collaborative Reference Fourdrinier Kraft Board Group

Program for Containerboard American Paper Institute, Inc.

and U.S. Department of

Commerce, National Bureau

of Standards

p-QC—1

100

. U56

30-1836

1980

L ^
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

Smoothness

Surface pick strength

K & N ink absorption

Moisture content

Opacity

Blue reflectance (brightness)

Specular gloss, 75°

Thickness

Concora (flat crush)

Ring crush

FKBG-API Containerboard (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

CTS Rubber (4 times per year)

Tensile strength, ultimate elongation and tensile stress

Hardness

Mooney viscosity

Vulcanization properties

ASTM Cement (2 times per year)

Chemical (11 chemical components)

Physical (15 characteristics)

AASHTO Bituminous

Asphalt cement (2 times per year)

Cutbacks (once a year)

NBS Collaborative Reference Programs

A05 Technology Building

National Bureau of Standards

Washington, DC 20234

Rev. 10/79
NATIONAL BUBKAV OF CtANDABDS

LIBBART

SEP 1 9 1980

CONTAINER

BOARD

Collaborative Reference report no. 127

Program for April 1980

Containerboard

T.L. Cummings

NBS Research Associate

Collaborative Testing

Services, Inc.

J. Horlick

Office of Testing Laboratory

Evaluation Technology,

Office of Engineering Standards,

National Engineering Laboratory

U.S. Department of Commerce, Fourdrinier Kraft Board Group

National Bureau of Standards American Paper Institute, Inc.

INTRODUCTION

The Collaborative Reference Program for Containerboard is

cosponsored by the Fourdrinier Kraft Board Group (FKBG) of the

American Paper Institute, Inc. and the National Bureau of

Standards. The Program is maintained and operated by Collaborative

Testing Services, Inc. (CTS) . CTS is a non-profit organization of

associations that offers CRPs to a wide range of industries.

Samples of three weights of linerboard, nominally 26 lb, 42 lb, and

69 lb and of corrugating medium (26 lb) are separately randomized

from uniform narrow rolls and packaged for distribution to the

participants. Each month, sufficient test material for four weekly

tests is mailed to participants for testing Mullen bursting

strength according to TAPPI official testing method T807 os-75 or Concora flat crush strength according to TAPPI official testing

method T809 os-71. The participants return their test results to

NBS for analysis and receive a monthly report from NBS. This

report compares each laboratory's results with the industrial mean.

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

reports in general, contact Thomas L. Cummings on (703) 442-0433

or Jef f rey ,Horlick on (301) 921-2946.

Jeffrey Horlick, Technical Administrator

NBS Collaborative Reference Programs

Office of Testing Laboratory Evaluation Technology

May 29,1980

TABLE OF CONTENTS

Page

1 Explanation of Tables

4 Instrument Codes

5 Use of Average Mean as a Reference Standard

6 Bursting Strength, Linerboard 42L3, weeks 1-4

8 Bursting Strength, Linerboard 26K1 weeks 1-4

10 Concora Flat Crush, Corrugating Medium 26D3

EXPLANATION OF TABLES

Each table shows laboratory test results for Mullen bursting strength

of linerboard or Concora flat crush strength of corrugating medium.

The data are divided into three time spans. On the left of each table

is an analysis for each week of the month. In the center is cumulative

data for the month and on the right is cumulative data for up to 16

weeks.

Conservative statistical tests have been used in excluding extreme

data from the analyses. Thus, where the mean (average) for one laboratory is compared with the average for many laboratories, limits have

been used that would exclude only one laboratory in a hundred if all

laboratories followed exactly the same testing procedure. Consequently,

laboratories receiving "X" flags should review their testing procedures,

instrument calibration, and control processes. Similar conservative

criteria were used in flagging within- laboratory standard deviations

and other statistics.

LAB MEANS THIS MONTH

WEEKLY VALUES : CODE V WK-1 WK-2 WK-3 WK-4

LAB CODE - Confidential laboratory identification number known only to the

participant and the Collaborative Reference Program staff.

V - Code for indicating instrument type, units used, and any other

variation in test procedure or conditions. A ' + ’ in this column

means a non-standard variation. Data marked ' + ' are not included

in the combined averages for all laboratories. (see page 4).

MEANS THIS MONTH - For each laboratory each weekly mean is the average of

individual test determinations, usually an average of 20

determinations

.

FLAGS (following means and standard deviations) -

X - Data excluded from an AV MEAN or average standard deviation

because value deviated from the AV MEAN or average standard

deviation by more than 2.576 times the appropriate standard

deviation. A laboratory following the prescribed test method

could obtain such an extreme value by chance only one time in

a hundred. Corrective action is almost certainly required .

* ” Data included in the CUMULATIVE AV MEAN but the value deviated

from this mean by more than 1.960 and less that 2.576 times the

SD CUM MEAN. A laboratory following the prescribed test method

could obtain such an extreme value by chance only one time in

twenty. Corrective action may be desired.

1
s - This is a warning to the laboratory but does not affect inclusion

or exclusion of the laboratory's results from the corresponding

AV MEAN. This flag indicates an extremely high or low within- laboratory standard deviation (SDR, not shown) that could occur by

chance only one time in a hundred if the laboratory is following

the prescribed test method.

AV MEAN - (at bottom of table) - The average for the indicated week of the

means for all laboratories, except those laboratories marked '+' in column V and those means marked with an 'X'.

SDR - (not shown) - The standard deviation of within-laboratory measurements; i.e., the Standard Deviation of the Replicate measurements

made at one time in one laboratory on one package of test pieces.

AV SDR - The average for the indicated week of the SDR's of all the laboratories, except those omitted from the AV MEAN. Also an extremely

high or low SDR as compared with the AV SDR based on the remaining

laboratories is omitted from the AV SDR and the letter 'S' is

placed after the laboratory mean for that week. The AV SDR is an index of the within-laboratory precision for repeated measurements;

i.e., a measure of the ability of an average laboratory to repeat

its results over a short period of time. It includes measurement

error and sample variation.

SD LABS - For each week the standard deviation of the means about the AV MEAN

for that week after omitting those means marked with an 'X' or noted '+' in column V. The SD LABS is an index of the among-labora

tory precision of the test method as applied by the participating

laboratories; i.e., a measure of the ability of laboratories to get

comparable results.

NO. INCL -- The number of laboratory means included in the AV MEAN for that

week.

NO. OMIT -* The number of laboratory means reported but omitted from AV MEAN

because of non-standard equipment, environment or procedure ('+' in

column V) or because of extreme results (X following mean).

NOT RCD - The number of laboratories failing to report data on time or in

usable form for this week (but who reported data for at least one of the other weeks of this month) , or who received test pieces

from a different sample of material and whose data therefore are shown in another table of this report.

SD SHTS - (Concora only) The average for the indicated week of the amongsheet within-laboratory standard deviations. The SD SHTS is an index primarily of the variability among sheets.

2
THIS MONTH

VALUES THIS MONTH: MEAN SDR SDWKS

MEAN - The average for the indicated laboratory of the reported weekly

MEANS THIS MONTH.

SDR - The average for the indicated laboratory of the weekly SDRs for

the current month.

SDWKS - For the indicated laboratory, the standard deviation among the

laboratory's weekly MEANS THIS MONTH (including those means

marked with an 'X').

CUMULATIVE

CUMULATIVE VALUES: MEAN SDR SDWKS WKS

MEAN - The average for the indicated laboratory of all its weekly means

for the number of weeks indicated, including those for the current

month. An '*' or 'X' following this CUMULATIVE MEAN indicates the

laboratory is running consistently low or high. (See above for

explanation of these flags)

.

SDR - The average for the indicated laboratory of the weekly SDRs for

the indicated number of weeks.

SDWKS - For the indicated laboratory, the standard deviation among the

laboratory's weekly means (including those means marked with an

'X'). SDWKS is an index of the week to week precision; i.e., a measure of the ability of a laboratory to repeat its results from

week to week.

WKS - Number of weeks for which usable results have been reported by

that laboratory. At most, 16 weeks of data are included.

GRAND AVERAGES

GRAND AVERAGES : THIS MONT H CUMULATIVE 12 WEEKS

THIS MONTH - Averages for the four weeks of the quantities shown to the left.

CUMULATIVE - Averages for the indicated number of weeks , including the four

weeks of the current month.

3
AV SDWKS - The average of the SDWKS for all laboratories excluding those

marked ' +' in column V or with an ’X* following the corre- sponding THIS MONTH or CUMULATIVE MEAN or SDWKS.

SD CUM MEAN - The larger of either (1) the standard deviation of the

CUMULATIVE MEANS about the average CUMULATIVE MEAN after

omitting those CUMULATIVE MEANS marked with an 'X* or with

a in column V, or (2) the CUMULATIVE SD LABS divided by

the square root of the number of weeks cumulated. The

former will be appreciably larger than the latter only when

there are persistent systematic differences among the

laboratories

.

Code

INSTRUMENT CODES

FOR

MULLEN BURST OF LINERBOARD

(Column V)

Description

A

H

IJ

L

M

R

X

Model A y Manual Clamp

Model AH, Hydraulic Clamp

Model A, Hydraulic Clamp added

Jumbo, Hand Clamp, Hand Driven

Lhomargy, Hydraulic Clamp* in kPa

Model AH* Hydraulic Clamp* Transducer

Model A, Air Clamp added

Other Model, Please Describe Instrument

Make and Model

Y

Z

Nonstandard Instrument or Method

Data received too late to be included

in statistical analysis

Code

INSTRUMENT CODES

FOR

CONCORA TEST OF MEDIUM

(Column V)

Description

Z Data received too late to be included

in statistical analysis

4
Use of Average Mean as a Reference Standard

A large supply of linerboard in three weights was randomized and placed

in sealed packages ready for shipment. The supply for each weight of

board was divided into several narrow "rolls” or cross-machine "positions"

of a larger roll, and each position was separately randomized. Each

package contains test pieces from one position only. The position is

designated by the number following the letter in the code marked on the

package. Thus 42H 1^ indicates that this package contains 42 lb board

from position 1 of lot H. Samples from the first position are distributed

until exhausted, then from the second position, and so forth for each

weight of board. Thus for short periods of time (several weeks to months),

the samples that the participants test are from the same position of a lot,

and for a longer period from the same lot.

The three weights of linerboard distributed in this program may be used as reference standards. The best reference values are the cumulative grand

AV MEANs in the latest reports. These values are given at the bottom right

of each table. For each weight of board, comparisons should be made first

for measurements made on the same position, i.e., for checking your current

measurement, use grand AV MEANs that have the same position code as on the

packages being tested. The position is shown in the upper left corner of

the table. If no report is yet available on the current position, grand

AV MEANs from previously tested positions of the same lot may be used as approximate reference values.

Similarly a large supply of a 26 lb corrugating medium was randomized,

after dividing into several narrow rolls or positions. The above

discussion for linerboard also applies to the corrugating medium.

We are currently using the fourth lot of linerboard and the fourth

lot of corrugating medium:

Lot Material Codes Used

1 linerboard A, B, C October 1969 - April 1973

2 linerboard D,E,F September 1972 - September 1976

3 linerboard G , H, I , J October 1976 - September 1979

4 linerboard K,L,M September 1979 -

1 corrugating medium (A) May 1973 - March 1976

2 corrugating medium B April 1976 - February 1977

3 corrugating medium C March 1977 - August 1978

4 corrugating medium D Septemher 1978 -

5
LINER30ARD 42L3 COLLABORATIVE REFERENCE PROGRAM APRIL 1980

REPORT NO. 127

BURSTING STRENGTH (MULLEN), PSI

LAB MEANS THIS MONTH THIS MONTH CUMULATIVE

CODE V WK-1 WK-2 WK-3 WK-4 MEAN SDR SDWKS MEAN SDR SDWKS WKS

100 H 118.4 116.0 121.2 121.2 119.2 8.6 2.5 119.3 7.9 1.5 1 1 102 H 114.4 115.2 119.5 1 15.3 116.1 7.2 2.3 116.1 6.9 1.9 1 1 103 I 119.3 119.1 1 19.5 119.4 119.3 5.4 . 1 119.4 6.3 1.4 1 1 105 M 118.6 119.3 118.4 118.8 6.6 .5 117.2 8.3 3.0 1C 106 H 120.1 121.2 116.2 1 17.3 116.7 6.

2.3 121.2 6.7 2.6 1

108 M 119.4 121.1 122.3 118.8 120.4 7.2 1.6 120.0 6.9 1.2 9 109 H 118.5 124. 6X 122.5 121.0 121.6 7.3 2.6 120.4 7.0 2.3 1 1

1 1 0 M 1 17.9 119.0 122.9 120.0 6.8 2.6 1 20.

8

7.7 2.3 10

1 1 1 M 122.7 118.2 1 17.

C

1 14.5S 118.1 8.6 3.4 1 17.7 8. 1 3.0 1 1 1 1 2 H 118.5 120 .3 115.0 116.1 117.5 8.4 2.4 114.6 e.5 4.0 1 1

113 p 114.1 120.3 115.0 117.0 116.6 7.2 2. 8 1 16.7 6.9 2. 1 1 1 114 M 115.1 120.9 120 . 1 S 117.2 1 18. 4 8.9 2.7 119.9 7.5 2.7 1 1

1 1 5 R 117.6 119.3 121 .7 120.7 119.8 7.2 1.8 117.0 6.6 3.3 1 1 117 H 1 18.

C

116.4 116.8 115.1 116.6 8.2 1.2 1 15.5 7.3 2.4 1

1 1 9 H 121.8 1 17.6 116.1 119.8 118.8 7.0 2.5 117.9 7.5 3.2 1 0

120 R 118.0 1 16 .

3

115.9 114.4 1 16. 2 7.5 1.5 116.4 7.6 1.8 1

1 2 1 M 121.0 122.4 120.3 122.3 121.5 6.9 1.0 121.2 7.3 1.8 1

125 3 119.4 119.3 122.4 120.7 120.5 7.7 1.4 1 19. 1 7.7 2.0 1

127 H 120.6 118.9 118.0 118.5 119.0 5.9 1.1 119.7 6.4 1.9 1

128 H 122.2 117.4 119.1 117.3 1 19. 0 7.6 2.3 118.3 7.5 2.6 1

130 H 122.1 119.7 118.0 120.8 120.2 7.9 1.8 120 .7 7.9 1.8 1

131 R 1 13.7 1 12.9X 111 .7XS 115.8 1 13. 5X 8.2 1.7 115.7 8.8 3.4 1

133 A 118.4 119.9 117.2 121.0 119.1 7.7 1.7 1 17.

3

7.0 1.9 1

134 H 115.2 117.3 1 17.6 I 18.8 1 17.3 7. 1 1.5 117.3 7.3 1.2 1

135 3 117.1 117.2 1 13.3 111.8 1 14. 9 8.2 2.8 115.8 7.7 2.4 8

136 H 118.7 116.2 116.6 120.1 1 17. 9 7.8 1.8 116.6 7.5 2.5 1 1 137 H 115.1 119.2 120.7 119.7 118.7 9.2 2.5 120.4 8.3 4.4X 1 1 133 H 122.3 120.4 122.6 120.0 121.3 8.1 1.3 123.1* 7.9 2.2 1 1 139 R 115.9 117.6 1 17.4 118.7 117.4 9. 1 1.2 1 15. 4 7.9 4. 1 10

140 H 1 16 . OS 1 1 7.9S 1 19.9S 117.9 2.8 1.9 117.3 3. IX 1.2 Q

141 M 115.9 115.9 116.6 116.1 116.1 6.6 .3 116.4 6.4 .8 1 1 1 42 A 118.4 118.7 116.6 117.7 118.4 5.6 .4 1 17 .2 6.5 2.3 1 1 143 H 121.5 117.0 122.2 118.7 119.8 8.0 2.4 120.7 8.7 2.3 6 145 H 115.4 117.8 119.4 123.2 118.9 5.7 3.3 118.6 6.4 3.0 1 0 147 H 119.9 117.4 119.6 115.4 118.2 8.1 2. 1 116.5 7.8 2.5 1 1

149 H 120.2 118.6 1 17.7 1 17.9 118.6 7.9 1 . 1 118.5 7.2 3. 1 1 1 151 H 117.3 121.4 1 20 .

6

119.1 119.6 7.5 1.8 120.3 7.5 1 .

8

1 1 153 H 126.5X 123.1 118.4 126. IX 123. 5X 6.9 3.7 123.1* 7.3 3.3 1 1 155 H 117.4 120.2 118.5 117.5 118.4 7.0 1.3 118.8 6.0 1 . 1 1 1 157 H 114.6 114.3 113.4 1 15.3 1 14. 4 6.6 . 8 114.7 6.2 1 .0 1 1

16 1 X 120.4 123.5 120.0 12C.3 121.1 8.

3

1.7 123.4* 7.1 2.7 1 0 165 P 117.8 119.3 118.4 115.5 117.8 7.5 1.6 117.5 6.9 1.6 1 1 167 H 112.3 116.0 117.1 1 17.3 1 15.7 6.2 2.3 115.3 7.0 2.1 1 1 169 3 119.6 115.9 117.8 1 1 1 .6S 116.2 7.8 3.4 116.8 7.5 2.5 1 1 17 1 H 114.4 118.3 120.3 116.4 117.4 7.0 2.5 115.8 6.8 2.4 1 1

172 H 117.5 117.4 1 16 .OS 117.5 1 17. 1 4.6 .7 117.9 5.8 1.9 1 1 173 H 121.0 122.0 119.6 118.6 1 20. 3 6.6 1.5 121.5 6.2 2.3 1 1 174 H 116.1 1 12.3X 113.7 114.4 1 14.2 8.1 1.6 116.2 7.9 2.5 1 1 175 H 124. 6X 124. OX 119.0 124.5 1 23. 0 8.4 2.7 120.7 e. 1 3.3 1 0 176 H 115.7 117.1 117.6 115.3 116.4 8.2 1 . 1 1 16 .

0

7.5 2.8 1

177 H 115.9 115.3 116.3 115.9 8. 1 .5 117.7 7.6 2.1 10

1 82 H 118.5 116.9 121.9 119.6 119.2 6.4 2. 1 119.8 7.4 2.0 1

1 84 H i ie.7 141 . 6XS 126.4X 119.3 1 26 . 5 X 9.6 10.7 123.1* e .2 7. OX 10

186 3 119.6 118.6 116.9 119.5 118.7 8.1 1.2 119.7 7.8 1.2 1

1 88 T 117.6 117.1 119.2 118.1 1 16. 0 6. 1 , Q 117.9 6.6 1.0 1

6
LINERBOARD 42L3 COLLABORATIVE REFERENCE PROGRAM

REPORT NO. 127

BURSTING STRENGTH (MULLEN), PSI

APRIL 1980

LAB MEANS THIS MONTH THIS MONTH CUMULATIVE

CODE V WK-1 WK-2 WK-3 WK-4 MEAN SDR SDWKS MEAN SDR SDWKS WKS

198 R 118.1 1 17.0 1 16.0 1 17.0 6.2 1.0 115.9 6.5 1.9 10 250 N 1 15.6S 115.1 1 16.9 l 15.9 10. 1 .9 115.2 9.6X 1.5 8 274 H 116.9 117.3 1 17.3 118.7 117.6 7.0 .8 117.1 6.8 1.0 1 1 283 H 121.0 121.3 121.2 6.9 .2 119.2 6.6 1.9 6

287 A 130. 5XS 131 ,2X 132. 4X 128. IX 130. 6X 9.9 1.8 1 30 . 1

X

10. 2X 2.6 1 1 359 H 12C . 1 119.8 1 16.7 119.2 1 19.0 8.4 1.5 116.1 7.6 2.9 1 1 55 3 M 120.0 120.3 118.2 125. 9X 121.1 6. 1 3.3 121.3 6.9 2.2 1 1 56 2 A 121.1 123.8 122.0 1 19.5 121.6 8.3 1.8 122.9* e.o 3.6 1 1 56 8 I 129. 4X 130. IX 125. 9XS 125. 6X 127. 8X 10.7 2.3 126.9X 8.9 4. 3X 1 1 56 9 A 121.5 117.7 118.1 118.0 118.8 8.9 1.8 120.3 8.3 2.2 1 1 658 H 116.5 117.9 1 17. 2 5.1 1.0 117.2 5.4X .8 6

701 H 120.8 117.4 122.9 118.4 1 19.9 7.2 2.4 119.8 7.7 2.0 1 1

AV MEAN

WK- 1 118.2

WK-2

118.5

WK-3

118.5

WK-4

118.2 AV

THIS

MEAN

GRAND

MONTH

118.4

AVERAGES

CUMULATIVE 11 WEEKS

118.3

AV SDR 7.5 7.1 7.1 7.5 AV SDR 7.3 7.3

SD LABS 2.5 2.0 2.4 2.6 SD LABS 2.4 2.8

NO. INCL 61 57 59 55 NO .INCL 58.0 59.2

NO. OMIT 5 9 6 6 AV SDWKS 1.9 2.2

NOT RCD 1 1 2 6 SD CUM MEAN 2.2

7
LINERB9ARD 26K1 COLLABORATIVE REFERENCE PROGRAM APRIL I960

REPORT NO. 127

BURSTING STRENGTH (MULLEN), PSI

LAB MEANS THIS MONTB THIS! MONTH CUMULATIVE

CODE V WK - 1 WK -2 WK -3 ftK -4 MEAN SDR SDWKS MEAN SDR SDVVKS WKS

100 H 83.4 79.5 81.3 81.6 81.5 5.4 1.6 81.3 5.6 1.3 12 102 H 74 . 9 X 79.4 76.9 77 . 1 77 . 1 5.

1.8 77.9 5 . 1 2.0 1 1 103 I 80.5 80.5 80.5 78.9 80.

6.6 . 8 80 .0 6 . 0 1.9 12 105 M 80.9 85.5 84.0 83.5 6.4 2.4 81 .2 6.3 2.2 1 1 106 H 82.4 82.2 31.8 82.4 82.2 4.9 .3 82.

6.4 1 .

8

12

108 M 84.

82.4 80.4 79.7 81.7 5.4 2.0 82.9 5.6 2.4 6

1 09 TJ 79.6 79.4 79.4 78.7 79.3 6.2 .4 78.6 6.4 2.0 12

1 10 M 81.1 83.2 84.82.8 8.2 1.6 83.2 7.0 1.3 1 1 1 1 1 M 83.1 82.5 81 .8 78.6 81.5 6.2 2.0 80.5 6.9 2.5 12 112 H 74 . IX 77.6 74.6 78.2 76 . 1 8.5 2.1 72 . 9 X 7.9 2.9 12

1 1 3 R 81 .7 83.8 91.0 80.1 81.7 6.7 1.6 80 .

5.7 1.6 12

1 1 4 M 86 .

3

83.4 83.2 85.5 84.6 5.7 1.5 83.5 5.6 2.0 1 1

1 1 5 R 80.5 81.8 78.7 80.4 80.4 5.5 1.3 78.7 5.5 2.0 12 117 H 78.6 81.5 78.8 77.8 79.2 6.5 1.6 79.7 5.9 2.0 12

1 19 H 84 .76.2 78.9 77.9 79.3 7.2 3.4 79.1 6.4 2.5 1 1

120 R 82.8 81.2 92 . 1 61.4 61.9 5.9 .7 83.

6.2 1.9 1 1 121 M e 5.8 e 3 .4 86.7 84.0 85 . 0 7.2 1.6 83 .2 6.7 2.5 12 125 I 79.4 76.0 81.3 81.3 79 . 5 6.9 2.5 81.6 6.2 3.0 12 127 H 82.5 80.9 81 .3 81 .6 81.6 5.0 .7 81 .7 5.1 .7 12 128 H 82.2 8 1.4 84.7 79.6 82 . 0 6.7 2.1 31 .9 6.8 1.6 12

130 H 83.3 81.3 82.4 82.0 62.3 6.6 .8 82.0 7.2 1.7 12 131 R 77.5 78.3 73.4 76.0 76 . 3 6.9 2.2 78.9 6.7 2.9 12 133 A 82 . 1 79 .

9

80.3 76.8 79.6 7.2 2.2 79 .

6

7.1 2.0 12 134 H 79.

82.9 84 .

83.3 82.4 5.8 2.2 83.9 5.7 3.1 12 135 I 81 .6 78.4 75.9 78.5 78 . 6 6.9 2.3 83.3 6.2 5 .

X 8

136 H 80.8 81 .0 82.7 82.3 81.7 5.8 1.0 81.2 5.9 1 . 1 12 137 H 77.8 77.6 78 .0 81.2 78.7 7.9 1 .7 T 9.

7.4 3.1 12 138 H 8 1.8 81.4 82.3 84.4 62.5 6.6 1.3 82 .8 6.9 1.6 12 139 9 79.2 so. e 83.4 80.5 8 1.0 7.4 1.8 78 .

7 . 1 2.6 12 140 H 78.3 75.6 75.4 76.4 3.5 1.6 76 . 1 * 4 . 3 X 1.3 1 1

141 M 78.0 77.4 78.5 79.5 78 . 4 5.0 .9 78.8 5.7 .8 12 142 A 77.2 76.7 78.5 76.2 77 . 2 5.7 1 . 0 76 . 5 * 5.9 1 . 1 12 143 H 79.0 79.0 76.8 78.9 78.4 5.7 1 . 1 78.4 5.7 1 . 1 4 145 H e 2 . 3 76.2 83.4 84.7 81.7 6.3 3.8 31 .8 6.1 2.9 1 0 147 H 76.8 79.6 79 .3 83.0 79 . 7 7.0 2.5 80.2 6.7 2.0 12

149 H 63.5 81.7 81.4 79.7 81.6 6.4 1.6 82 .

6.4 1.2 1 1 15 1 H eo .7 82.9 82.6 79.7 81.5 6.2 1.6 79 .

8

6.5 2.4 1 1 153 H e 4 . l 8 1.8 85.5 85.

84 . 1 6.7 1.7 83.

7.1 1.9 12 155 H 82.2 79.0 81.4 81.3 81.0 5.6 1.4 80.5 6.3 1.3 12 157 H 79.6 76.6 76.6 77.2 77.5 4.8 1.4 82.3 5.6 4 . 4 X 12

16 1 X 80.4 80.0 83.0 81.2 81.2 5.8 1.3 30.6 5.7 1.8 12 165 P 79.5 83.3 81.4 82.4 61.6 7.0 1.6 81.8 6.8 1.6 1 1 167 H 78.1 78.3 79.8 81.1 79.3 5.9 1.4 77.3 5.6 2.5 12 169 I 80.9 82.0 82.0 82.6 81.9 6.9 .7 82.9 6.3 1.6 1 1 171 H 74 . 4 X 77.2 74.6 78.2 76 . 1 7.

1.9 78.7 6.4 2.5 12

172 H 80.5 81.8 30.5 79.9 80.7 4.7 .8 79.9 5.4 2.6 12 173 H 83.3 60.7 93 . 1 84.9 83 . 0 4.9 1.7 82.6 4 . 7 X 1.5 1 1 174 H 80.4 82.

77.3 75.

78 . 8 8.1 3 . 1 80.6 6.9 3.3 12 175 H 85.7 93 . 3 X 88.0 89 . 9 X 89 . 3 X 5.7 3.2 83 .

8

5.9 5 . 7 X 12 176 H eo .9 7 8.3 79.9 77.8 79 . 3 6.3 1.4 79.4 6.6 1.6 12

177 H 77.8 77.5 79.1 78 . 1 6.5 .8 77.3 6.5 2.0 10 182 H 84.3 84.8 88.

80.4 84.4 5.7 3.2 83.6 6.4 2.0 12

1 84 H 79.6 85.0 80 . 4 S 78.9 61.0 8.4 2.7 81 .8 7.6 3.1 12 186 I 83.3 80.8 77.5 80.3 80.5 6.2 2.4 81.5 6.0 2.3 12 168 I 79.0 80.3 79 .

80.8 79 . 8 6.9 .9 80.

6.5 1.2 12

8
LINERB0ARD 26K1 COLLABORATIVE REFERENCE PROGRAM APRIL 1980

REPORT NO. 127

BURSTING STRENGTH (MULLEN), PSI

LAB MEANS THIS MONTH THIS MONTH CUMULATIVE

CODE V WK-1 WK-2 WK-3 WK-4 MEAN SDR SDWKS MEAN SDR SDWKS WKS

198 R e2.7 78.8 77.6 79.7 5.9 2.6 32.4 5.9 4. IX 10 250 N 77.2 75.4 76.7 76. 5 6.6 .9 75. 3X 7.1 3.7X 9 274 H 80.7 79.4 79.9 80.1 80. 1 5.3 .5 80 .0 5.5 .5 12 283 H 79.1 82.3 80.7 7.0 2.3 80.2 7.9X 1 .7 8 2e7 A 85.5 85.2 87.4 86.0 86. 1 8.1 1.0 86 . 9X 8.2X 1.9 12

359 H 78.6 80.2 76.9 79.5 79.3 6.2 .7 78.1 6.7 1.9 8 553 M 83.6 85.7 86.2 86.1 85. 4 5. 8 1.2 84.7 5.7 2.5 12 562 A 84.0 85.0 78. 5S 80.9 82. 1 8.1 2.9 83.

1

7.4 4. IX 12 56 8 I 83.4 83.4 77.5 77.2 80.4 6.9 3.5 79.4 6.6 3. 1 1 1 569 A 78.9 79.4 80.8 75.1 78.6 5.8 2.4 79.1 6.2 1.8 10

658 H 80.0 79.7 79.9 4.2 .2 80.6 5.1 1.2 9 701 H 85.2 84.7 83.5 78.3 82.9 7.4 3.2 82.8 7.2 1.8 12

GRAND AVERAGES

WK-1 WK-2 WK-3 WK-4 THIS MONTH CUMULATIVE 12 WEEKS

AV MEAN 81.3 eo .7 80.7 80 .4 AV MEAN 80. 8 80.8

AV SDR 6.3 6.4 6.2 6.3 AV SDR 6.3 6.2

SD LABS 2.4 2.6 3.2 2.7 SD LABS 2.8 2.9

NO. INCL 62 63 63 58 NO. INCL 61.5 59 .7 NO. OMIT 4 3 2 3 AV SDWKS 1.7 2.0

NOT RCD 1 1 2 6 SD CUM MEAN 2.0

9
C0RRUG. MEDIUM 26D3 COLLABORATIVE REFERENCE PROGRAM APRIL 1980

REPORT NO. 127

FLAT CRUSH STRENGTH ( CONC0RA ) LB

LAB MEANS THIS MONTH

CODE V WK- 1 WK-2 WK-3 WK-4

100 74.4 71.4 72.1 74.1

102 72.0 72.7 72.7 72.1

1 C 5 73.7 70.1 69.2

106 73.9 73.7 72.9 72.5

1 10 72.8 74.1 72.4

113 72.2 68 .

5

71.6 71.3

1 14 71.9 71.9 71.4 71.5

1 1 5 74.1 73.5 72.3 72.8

1 l 9 72.1 72.5 70.8 73.9

120 73.7 72.3 71 .8S 69.2

125 82. 9X 8i .ex 79. 3X 78. 3X

128 74.3 70.7 71 .9 72.0

136 70.5 74.0 73.9 70.4

138 75.76.3 74.5 74.5

140 74.7 73.0 74.0 73.3

143 72.3 70.1 71.7

151 72.3 72.5 73. 5S

161 72.9 72.4 78. OS 72. 1 164 71.5 71.0 71 .

71.7

167 71 .3 72.0 71.5 72.3

177 69.4 72.8 70. 1

1 82 77.5 70.2 71.4 73.6

188 71.9 71.1 70.7 70.4

198 71 ,7S 71.4 78.3 75.8

237 72.9 74.1 72.0 72.1

250 68.5 68.6 69.0

269 69.8 73.9 74.0 72.3

284 71.0 71.4 70.5 69.7

287 77.3 77.1 76. 5S 78. IX 289 65. 6X 68 .

0

63. 3X

292 64. IX 63. 2X 67.9

350 86. 1XS 87. 6XS 86 .7XS 86 .2XS

35 1 72.9 7 1.4 71.0 69.6

353 75.0 73.4 72.4 72.0

355 74.9 74 .6 73.7 72.9

357 69 .

67.9 71.5 69.0

359 66. 8X 67.

65 . IX 70.

361 71.0 71.2 71.0 71.4

36 3 70.5 70.4 69.0

365 70.0 70.1 68.3 69.0

367 72.4 73.6 72.4 74.2

36 9 72.3 72. 1 72.8 72.6

377 76. 9X 76.2 75.75.7

379 72.3 74.8 72.9 72.9

381 74.8 75.2 74.8 73.8

383 73.5 70.4 74.6 73.5

385 75.3 73.1 75.6 74.9

387 72 .

8

77.2 77.4 78. 4X

391 70.71 .3 395 72.8 73.9 73.9 74.8

397 75.5 66.3 75.3 70.3

399 7 1.5 71.2 70.9 72.

553 73.3 72.6 73.1 72.5

562 74.6 72.71.8 71.2

568 72.

72.0 73.2 73.3

THIS MONTH CUMULATIVE

MEAN SDR SDWKS MEAN SDR SDWKS WKS

73. 0 3.1 1.5 72.6 4.0 1 . 1 16 72.4 3.8 .4 72.7 3.4 .6 16 71.0 4.0 2.4 72.6 4.2 1 .7 13 73. 2 3. 5 .7 73.0 3.4 .4 16 73. 1 4.4 .9 74 .4 3.7 1.8 15 70.9 3.8 1.7 71.9 3.2 1 . 1 16 71.7 2.5 .2 71.5 2.6X .8 16

73. 2 3.4 .8 72.2 3.5 1.4 16 72.3 4.2 1.3 70.5 4.0 2.8 15

71.8 3.8 1.9 71.2 3.7 1 .4 16

80. 6X 4.4 2. 1 80. 4X 4. 8X 1.3 16 72. 2 3.6 1.5 72.2 3.3 1.0 16

72. 2 4. 1 2.0 71.2 3.9 2.1 16 75. 1 3.9 .8 76.0 4.2 1.7 16 73.8 3.3 .7 73.3 3.6 1.0 16 71.4 3.6 1 . 1 71.5 3.5 .9 4 72. 8 4.5 .6 72.7 4.1 .5 15

73. 9 4.9 2.8 74 .0 4.4 2.9 16 71.4 3.7 .3 71.9 3.7 1.2 16 71.8 3.2 .5 71 .2 3. 1 1 . 1 16 70.8 3.8 1.8 69.6 3.3 1.6 15

73. 2 3.9 3.2 73.2 3.9 2.0 16 71.0 2.9 .7 71 .

5

3.0 1 . 1 16 74.3 3.8 3.3 71.3 4.3 2.7 16 72.8 3.9 1.0 72.9 4.0 1 . 1 16 68.7 2.3 .3 68.9 2. IX 1 .4 12 72.5 3.7 1.9 71 .6 3.6 1.5 16 70.7 4.0 .7 70.8 3.9 1.0 16 77.3 3.9 .7 77 .2* 4.1 .9 16 65. 7X 3.7 2.4 68.8* 3.3 2.8 15

65. IX 4.0 2.5 67.9* 3.7 2.6 15 86. 7X 7.9 .7 34. 2X 6 . 4 X 3.1 16 71.2 2.6 1.4 72.6 2.6X 1.6 16 73.2 4.3 1.3 73.3 3.9 2.2 14 74. 1 3.6 .9 72.9 3.6 1 .3 16

69.4 3.3 1 .

5

69.3 3.3 1.4 15 67. 3X 3.8 2. 1 80 . 5X 4.7X 9. OX 15

71.2 2.9 .2 70 .4 3.4 1 .5 15 70.0 3.4 .8 70 .3 3.2 1.2 15 69.4 3.2 .9 69 .

5

3.7 1.4 16

73. 1 3.0 .9 74.0 3.4 1.0 14 72. 5 3.3 .3 72.4 3.4 .7 1 5 76.5 4.2 1.7 74 .6 3.8 2.1 16 73.3 3.9 1. 1 74.1 3.9 1 . 1 1 4 74.7 4.2 .6 73.6 3.9 1 . 1 16

73.0 2.8 1.8 73.6 3.3 2.4 16 74.7 3. 1 1.1 74 .

3.2 2.2 15 76.5 3.8 2.5 76. 1 4.0 1.7 16 70.7 2.3 .9 67 . IX 2.3X 3 . 8X 12 73.8 4.0 .8 73.9 3.7 1.3 16 72.4 4.0 3.6 73.8 3.7 2.2 16 71.5 3.5 .5 70.8 3.5 1.8 16 72.9 3.3 .4 73.0 3.3 .7 16 72. 5 4.6 1.5 71 .9 4.2 1 .4 16 72.7 3.9 .7 73.5 3.6 1.3 16

10
COPRUG. MEDIUM 26D3 COLLABORATIVE REFERENCE PROGRAM APRIL 1980

REP0RT N0. 127

FLAT CRUSH STRENGTH ( C0NC0RA ) LB

LAB MEANS ‘THIS MONTH THISi MONTH CUMULATIVE

CODE V WK-1 WK-2 WK-3 WK-4 MEAN SDR SDWKS MEAN SDR SDWKS WKS

572 72.5 73.8 76.6 70.8 73.4 3.8 2.4 73.3 3.6 1.7 12 578 69.3 76.2 75.4 72.7 73.4 3.9 3. 1 75.6 4.1 3.0 16

609 71.7 71.1 71.0 70.4 71.1 3.0 .5 72.2 3.6 1 .4 16 617 77.4 75.0 80.9XS 76.9 77. 6X 5. 1 2.5 77. 5X 4.7X 1.5 16

WK- 1 WK-2 WK-3 WK-4 THIS

GRAND

MONTH

AVERAGES

CUMULATIVE 16 WEEKS

AV MEAN 72.8 72.4 72.6 72.3 AV MEAN 72.5 72.5

AV SDR 3.6 3.7 3.4 3.6 AV SDR 3.6 3.6

SD LABS 2.0 2.3 2.4 1 .9 SD LABS 2.1 2.4

NO. INCL 51 54 54 48 Ne .INCL 51.7 53.8

NO. OMIT 5 4 4 5 AV SDWKS 1 .3 1.5

NOT RCD

SD SHTS

32.312.212.2

62.1

SD CUM MEAN 1 .9

11
NBS-114A (REV. 9-78)

U.S. DEPT. OF COMM.

BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. FKBG CRP 127

2. Gov't Accession No.

i§

3. fosciprettt' s Accession No.

4. TITLE AND SUBTITLE

CONTAINERBOARD

Collaborative Reference Program for Containerboard

Report No. 127

5. Publication Date Mav 29.1980

1. Performing Organization Code

-

7. AUTHOR(S)

T.L. Cummings, J. Horlick

8. Performing Organ. Report No. NBSIR - 80-1836

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, DC 20234

«. Project/Task/Work Unit No.

. 11. Contract/Grant No.

12. SPONSORING ORGANIZATION NAME AND COMPLETE ADDRESS (Street, City, State, ZIP)

Collaborative Testing Services, Inc.

8343A Greensboro Dr., McLean, VA 22102

and American Paper Institute/Fourdrinier Kraft Board Group

13. Type of Report & Period Covered FINAL

14. Sponsoring Agency Code

15. SUPPLEMENTARY NOTES

| | Document describes a computer program; SF-185, FIPS Software Summary, is attached.

16. ABSTRACT (A 200-word or less factual summary of most s i ghi ficant 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; Containerboard ; Laboratory evaluation;

Precision; Reference samples; Testing calibration

18. AVAILABILITY Unlimited

|~X1 For Official Distribution. Do Not Release to NTIS

| | Order From Sup. of Doc., U.S. Government Printing Office, Washington, DC

20402, SD Stock No. SN003-003-

I | Order From National Technical Information Service (NTIS), Springfield, VA. 22161

19. SECURITY CLASS 21. NO. OF

(THIS REPORT) PRINTED PAGES

UNCLASSIFIED 15

20. SECURITY CLASS 22. Price (THIS PAGE)

UNCLASSIFIED

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