NBS Collaborative Reference

Program for Containerboard

Fourdrinier Kraft Board Group

American Paper Institute, Inc. and U.S. Department of

Commerce, National Bureau

of Standards

QC— J

100

. U56

79-1809

1979

Cj2 ,
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

pH

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

CTS Thermal Insulation Materials (2 times per year)

19 test methods for thermal insulation materials covering:

thermal properties; strength properties; dimensions, stability,

and density properties; fire properties; and properties of

vapor barriers

ASTM Cement (2 times per year)

Chemical' (11 chemical components)

Physical (8 characteristics)

AASHTQ 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, 3/79
iaiioftaJ- Bureau «• ,, . - FEB 2 7 1980

rvA ACC - Cxrc

CONTAINER

BOARD

(SUDO

USG>

Collaborative Reference

Program for

Containerboard

report no. 118

July 1979

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 Container board 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) . CIS 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 two monthly reports from NBS. One

report is a preliminary individualized report comparing a laboratory's results with the industrial mean. The other is a longer report (as illustrated by this report) showing the data from

all participants.

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

reports in general, contact Thomas L. Cunnings or Jeffrey Horlick

on (301) 921-2946.

Jeffrey Horlick, Technical Administrator

NBS Collaborative Reference Programs

Office of Testing Laboratory Evaluation Technology

September 17, 1979

TABLE OF CONTENTS

Page

1 Explanation of Tables

4 Instrument Codes

5 Use of Average Mean as a Reference Standard

6 Bursting Strength, Linerboard 42H12, weeks 1-4

8 Bursting Strength, Linerboard 69J2, weeks 1-4

10 Concora Flat Crush, Corrugating Medium 26D2
.
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 WE>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 requir ed.

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
AV MEAN -

SDR -

AV SDR -

SD LABS -

NO. INCL

NO. OMIT

NOT RCD -

SD SHTS -

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.

(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'.

(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.

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.

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-laboratory precision of the test method as applied by the participating

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

comparable results.

The number of laboratory means included in the AV MEAN for that

week.

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)

.

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.

(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 M0NT 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

.

INSTRUMENT CODES

FOR

MULLEN BURST TESTERS

(Column V)

Code Description

A Model A, Manual Clamp

H Model AH, Hydraulic Clamp

I Model A, Hydraulic Clamp added

J Jumbo, Hand Clamp, Hand Driven

L Lhomargy, Hydraulic Clamp

M Model AH, Hydraulic Clamp, Transducer

R Model A, Air Clamp added

X Other Model, Please Describe Instrument

Make and Model

If an incorrect instrument code has been assigned to your laboratory,

please inform us.

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 third 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

3 linerboard G,H, I ,

October 1976 -

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 September 1978 -

5
LINERB0ARD 42H12 COLLABORATIVE BEPERENCE PROGRAM JULT 1979 REPORT NO. 118 BURSTING STRENGTH (MULLEN), PSI LAB MEANS THIS MeNTH THIS MONTH CUMULATIVE

CODE V WK-1 WK—

2

WK—

3

WK —

4

MEAN SDR SDWES MEAN SDR SDRKS WKS

100 H 12 5*5 126*6 124* 1 125. 3 125. 4 To S 1.0 126* 2 8. 1 1.6 6 101 X 121*6 121*3 120*6 121*5 121* 2 5o7 .5 121* 2 5. 7X .5 4 102 H 128*7 126*5 128*5 127*6 127. 8 8.0 1.0 127. 8 8.4 1.4 6 103 I 124* 1 123* 1 124*5 122*5 123* 6 6.8 .9 123* 4 7.7 1.0 6 105 M 127*6 127*3 124*8 124* 1 126* 0 1 0.2 1.7 125* 4 9o 6 1.6 6

106 H 126.5 130*4 123.3 130.9 127* 8 7. 0 3.6 127* 8 7.2 2.9 6 108 X 127*9 134*0 134.8 132* 3 8.5 3.7 132. 3* 8.5 3.7 3 109 H 130*9 126* 8 133*5 126*8 1 29* 5 10.0 3.3 128* 2 9.9 3.3 6 110 M 135*0 125.3 126*2 127.4 1 28* 5 e.6 4.4 128© 3 9.8 3.4 6

1 1 1 M 130*8 123*5 126*4 127.9 127*2 e 0 5 3. 1 125* 9 8o 9 3. 1 6

112 H 123*3 1 17.9 119*2 120*8 120*3 7.3 2.3 120* 2 7.4 2.0 6 113 5 124*0 123*4 126* 1 125*5 1 24® 8 7.9 1.2 124* 9 7.7 1.0 6 114 A 124*0 131*0 126*5 129*5 127* 8 9.2 3. 1 127* 6 8.6 2.7 6 115 R 118*5 118*2 1 15.3X 118*7 1 17.7 8.2 1.6 117*8* So 3 1.4 5 117 H 121*2 123* 1 1 13.0X 122.7 120*0 9.5 4.7 1 19* 4 9o 6 3.8 6

119 H 130*2 129*3 126*8 129*9 129*0 9.9 1. 5 129* 1 9.8 1.3 6 120 R 126*7 128* 8 1 24* OS 129*2 127* 2 1 Oo 6 2.4 128* 7 1 0.4 3.6 6 121 M 131*3 130*0 131.0 128*4 130* 2 10o 1 1.3 129* 9 9. 8 1.2 6 123 R 128*2 127*4 125. 1 121*5 125* 6 9. 1 3o 0 125*5 9.4 2.8 6 125 I 128*4 129*0 133*7 125*5 129. 2 10.2 3o 4 126* 6 1 0o 9 5.0 6

127 H 1 22* 1 122* 1 124.9 127*6 124* 2 8. 1 2.6 124* 2 7.7 2. 1 6 126 H 125*5 127*5 12 e* 6 125.5 126* 8 1 1. 1 1.5 124* 4 10.5 4.2 6 129 R 121* IS 126.7 125*2 129.0 125. 5 6.7 3.3 125* 1 6.8 4.3 6 130 H 119*0 129*2 126* 1 125* 1 124* 9 9.0 4.3 124*7 9.0 3.4 6 131 R 1 2 2o 6 120.8 125*4 123.7 123* 1 9.9 2.0 124* 8 9© 6 3.0 6

133 A 12e*5 134* 1 127.2 126*4 129* 6 7.5 3. 1 129* 5 7.7 2.4 6 134 H 122*2 126*2 122*5 124*0 123* 8 7.2 1.8 122*7 8.2 2.2 6 135 I 1 4 1 * 0 X 124.6 132*4 128.5 13

1

0 6 9.7 7.0 134 0 OX 9. 8 6.5X 6 136 H 124* e 118*1 123.6 12 1.3 121* 9 8.9 2.9 121*9 8.9 2.9 4 137 H 122*2 125*4 123*7 120. 5S 123* 0 11.7 2. 1 124* 2 1 1. 2 3.0 6

138 H 131.6S 130.2 133.2 130* 1 131* 3 11.4 1.5 130 o 6 1 0o 7 lo 6 6 139 R 126*7 131.4 129*8 131*6 1 29* 9 9. 1 2.3 129* 0 9.4 2.3 6 140 H 122*5 122*2 1 17*9 121*6 121* 1 7.3 2. 1 121* 3 7.5 1.9 6 141 H 1 19*7 121*0 120*6 121*4 120* 7 7. 1 .7 120* 6 7. 5 .8 6 142 A 125*3 127*4 109.9X 120* 1 120* 7 8.7 7.8 121* 0 e. 5 6. IX 6

143 H 129*3 128* 4 127*2 12 5.7 127* 7 9.7 1.5 127* 6 1 0. 1 1.6 6 145 H 1 17.2S 116*1 1 18*0 1 18.4 1 17* 5 7.4 1.0 120* 6 7.2 5.0 6 147 H 122*8 120* 1 120*4 120.7 121* 0 9.4 1.2 121* 6 9.4 2. 1 6 149 H 133*5 125.9 127.2 128* 5 1 28o 8 8.9 3.3 128* 5 8.9 3.2 6 151 H 126.2 127. 3S 124*5 126*4 126*6 6.0 1.7 125* 8 6.7 1.8 6

153 H 128*0 130* 1 131*2 131*4 130* 2 8.5 1.5 130* 2 8. 5 1.5 4 155 H 122*8 128*7 120* 1 12 1*8 123* 4 1 0. 5 3.7 125* 6 1 Oo 0 5.2 6 157 X 122*3 118*4 126* 0 1 1 8*7 121* 4 9.9 3.5 1220 9 9.3 3.7 6 161 X 130*2 133* 1 130*3 134* 8X 132* 1 9.4 2.2 131* 7* 90 0 3. 1 6 163 H 122* 1 122.3 121*2 122*0 121* 9 9.2 .5 123.3 8.6 3.6 6

165 R 125*4 124*7 127.4 124*0 125* 4 9.2 1.5 126* 3 9. 1 2.0 6

166 H 125.4 125. 4 7.9 125* 4 7.9 1 167 H 124*3 121*3 121*4 126*8 123* 5 9.2 2.6 123. 0 1 0 o 0 2.7 6 169 I 130* OS 128*9 124*0 126*5 127* 4 1 0. 4 2.7 126* 0 1 Oo 4 3.9 6

171 H 129* 1 123.4 121*8 119*2 123* 4 9.0 4.2 124* 3 9o 3 3.7 6

172 H 125*6 129.7 124*0 125.6 126* 2 9.9 2.5 1260 1 9.8 2.0 6 173 H 123.6 123.3 123.5 122*4 123. 2 8.3 .6 122o 6 7.5 1. 1 6

174 H 127.9 121*3 123.7 125*7 124. 7 9. 0 2.8 124* 0 9. 5 2.4 6 175 H 124*0 126* 1 128*4 128*9 126* 9 e.6 2.3 1 26* 0 9.0 2.8 5 176 H 1 18. 1 122*9 124*0 124.9 122* 5 9.4 3. 0 122* 4 10.0 2.4 6

6
LINERB0AFD 42H12 COLLABORATIVE REFERENCE PROGRAM

REPORT NO. 118 BURSTING STRENGTH (MULLEN), PSI

JULY 1979

LAB MEANS TB1 S MeNTH THIS MONTH CUMULATIVE

CODE V E-l WK-2 HK-3 WK-4 MEAN SDR SDWKS MEAN SDR SDEKS WKS

177 H 1 19.5 1 19.6 122.8 120.7 120.7 8. 0 1.5 1 19# 7 7.7 2. 1 6 182 H 123.4 122.5 127.8 127.9 125. 4 8. 1 2.8 125# 5 8. 1 2.2 6 184 H 126. 1 124.7 125.3 131.7 127. 0 7.7 3.2 128# 0 8.0 3. 1 6 186 I 121.7 124.2 120.5 124.5 122. 8 8.2 2.0 122# 3 7.7 1.7 6 188 I 122.4 126.6 126.8 126.2 125. 5 7.7 2. 1 125# 1 7.8 1.9 6

250 L 130. 1 127.8 121.0 122.4 125.3 10. 1 4.3 125# 3 1 0. 1 4.3 4 274 H 125.9 125.7 125.2 125.9 125.7 7.5 .3 125# 9 7.6 .3 6 283 H 126.2 121.7 122.7 123.8 123. 6 7.2 1.9 125# 3 6.6 4. 1 6 287 A 142. 5X 143. 5X 149. 3X 147.0XS 145. 6X 10.5 3. 1 143# OX 10.0 8. OX 6 350 H 119.4 123.4 128.4 129.2 125. 1 10. 2 4.6 123# 2 10. 1 4.7 6

553 M 129.5 133.2 132. 1 132.5 131. 8 7.6 1.6 131.7* 7.9 1.4 6 562 A 134.9 134.

143. 3X 14 1.2X 138. 6X 1 1.6 4.4 137# 7X 1 1.4 4.3 6 56 8 I 122.7 125.4 125.9 128.0 125. 5 10o 1 2.2 126# 4 9.9 2.8 6 569 A 132.7 129.0 140.7X 134. 7X 134. 3X 9.3 4.9 132# 3* 9. 1 4.9 6 658 H 119.4 127.0 127.3 124.5 124.6 8. 2 3.6 1 24 e 3 8.4 3.6 6

682 H 129.7 148. 2X 1 47. OX 145.5X 142. 6X 7.9 8.7 142# 6X 7.9 8.7X 4 701 H 129.4 127. 1 125.6 127. 4 1 1. 1 1.9 127# 9 1 0.3 1.6 5

GRAND AVERAGES

WK-1 # w i ro WK-3 WK-4 THIS MONTH CUMULATIVE 6 WEEKS

AV MEAN 125# 5 125# 6 1 25# 5 125© 6 AV MEAN 125# 6 125.5

AV SDR 8# 5 e#9 9# 1 8# 5 AV SDR 8# 8 8#8

SD LABS 4. 2 4#0 3# 7 3# 5 SD LABS 3# 9 3 0 9

NO. INCL 64 64 59 62 N6.INCL 62# 2 6 1 # 8 NO. OMIT 7 7 12 8 AV SDWKS 2.7 2© 6 NOT RCD 1 1 1 2 SD CBM MEAN 3© 1

7
LINERB0AFD 69J2 COLLABORATIVE REFERENCE PROGRAM JULY 1979 SEPORT NO. 118 BURSTING STRENGTH (MULLEN), PSI LAB MEANS IBIS MONTH THIS MONTH CUMULATIVE

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

100 H 154© 1 155.9 158.0 157.1 156*3 1 1*6 1.7 155.2 12*5 2.8 5 101 X 1 5 2® 6 153.9 157.9 156.7 155* 3 13*9 2.4 154.7 13*0 2.5 5 102 H 1 59© 2 166. 5X 159.2 160.9 161. 4 10.2 30 5 160. 9 10.5 3.2 5 103 I 15e®8 157.4 158.3 156.0 157.6 12.8 1.2 158* 0 13* 1 1.3 5 105 M 1 56® 0 150. 1 159.9 150* 3S 154. i 17. 5 4.8 154. 3 16.7 4. 1 5

106 H 149*0 151.6 155.2 156.7 153. 1 9.7 3.5 154. 4 9.5 4. 1 5 108 X 16 1*4 164.2 154*0 159.9 12.7 5.3 160.4 12*5 4.4 4 109 H 157*7 160.4 158.7 158.0 158.7 17.7 1.2 158. 4 1 8. 4 1.3 5

1 1 0 M 155*4 152.0 154.8 160.6 155.7 1 5. 0 3.6 155* 8 1 5*8 3. 1 5

1 1 1 M 155.9 152.9 152.9 154.4 154. 0 16.7 1.4 154. 0 16.3 1.2 5

112 H 154.3 154.0 149.2 153. 1 152. 7 1 0.0 2.4 154. 2 1 0. 3 3.9 5 113 R 156*7 156. 1 157.9 156.3 156. 7 10.7 a 8 1 56 o 6 10*7 .8 5 114 A 154*2 157.5 159.2 156.8 156. 9 13. 8 2. 1 156. 8 13*4 1.8 5

1 1 5 B 161*5 153. 1 148.2 153. 8S 154. 2 10.4 5.5 153. 8 1 0*2 4.8 5 117 H 151*6 1 5 1 © 6 156.3 152.5 153.0 1 1.5 2.2 153* 4 1 1.4 2. 1 5

1 1 9 H 155. 1 162. 6 154.5 16 1.3 iee. 4 13.4 4.2 157* 9 14.4 3. 8 5 120 R 16 1 © 2 155. 4 156.6 148* 1 155. 3 16. 0 5.4 153. 8 1 5. 8 5.9 5 121 M 161*8 1 56.

2

158.0 154.4 157. 6 12. 1 3.2 159* 1 1 1*9 4.4 5 123 B 148.7 150.3 147.6 142.5X 147. 3X 1 5. 2 3. 4 148. 4X 15. 1 3.8 5 125 I 156.3 158.9 155.4 154.6 156* 3 1 0.3 1.9 156. 3 10*4 1.6 5

127 H 156*3 156. 8 150® 4 157*9 155. 4 12.6 3.4 155. 8 1 1*9 3. 1 5 128 H 155. 1 154.6 152.7 153.8 154. 1 14.0 1.0 154. 5 14.6 1.3 5 129 R 152. 7S 156.3 149*0 159.5 154. 4 1 1.4 4.5 150.7 10.5 9. 2X 5 130 H 151.4 162.7 159.5 150.3S 156. 0 17*4 6. 1 155. 4 17*0 5.4 5 131 R 159. 1 158.7 150.6 158.7 1 56. 8 19.3 4. 1 156.3 i e* 4 3.8 5

133 A 156*4 154. 5 144. 9X 158.0 153. 5 12.7 50 9 154* 4 1 3. 4 5.5 5 134 H 148*5 156.2 153.5 158.8 154® 3 1 1*8 4. 4 154. 1 1 1.4 3.8 5 135 I 162.0 148.5 154.3 158. 1 155.7 1 5.3 5. 8 160* 0 1 5.7 10c 9X 5 136 H 154.7 145. IX 151.7 148.7 150. 0 1 2. 2 4. 1 149* 6* 1 1*8 3.7 5 137 H 152.7 154.7 161.2S 156.6 156. 3 16.2 3.6 157. 6 16*9 4.3 5

138 H 159.6 156. 1 163.5 159*2 159. 6 16. 1 3. 0 158. 9 15. 8 3.0 5 139 R 156.3 167. 6X 157.0 156.7 1590 4 1 5C 7 5.5 1 58* 6 1 5.6 5o 1 5 140 H 154.5 156.3 153.3 162.8 1 560 7 13.9 4. 2 155.5 12.8 4.6 5 141 H 1 53.

3

155. 8 155. 2S 157.0 155. 4 8. 4 1.6 155.7 8* 1 1.5 5 142 A 157.0 146.2 151.3 152. 1 151. 7 1 1*9 4.4 151. 4 12.6 3.9 5

143 H 155.6 15e.6 155.2 156.6 1 56* 5 15*4 1.5 157* 0 14*9 1.7 5 145 H 152. 1 153. 0 154*5 157.3 154. 5 1 1.7 2.0 154. 5 1 1.7 1.7 5 147 H 156.8 155. 2 153.5 149.7 153* 8 1 50 1 3.0 152* 9 1 5*2 3.3 5 149 H 159. 1 156. 6 160.6 169. 8X 161. 5 16.4 5.8 161.3* 17*3 5.0 5 151 H 156.5 156. 8 154. 1 156*8 156. 0 9*9 1.3 156® 1 10.5 1.1 5

153 H 151*3 158.9 158.2 156.6 156. 3 15. 2 3.4 156.3 15. 2 3.4 4 155 H 155.9 157.8 161.8 163.8 159* 9 1 8© 3 3. 6 159. 5 i e *2 3.2 5 157 X 160.7 149® 9 154.4 157.4 155. 6 12.0 4.6 155. 7 12*9 4.0 5 161 X 156.9 158.6 156.8 158.4 157.7 1 5*4 1.0 157. 1 1 4. 2 1.5 5 163 E 153.0 155.6 158.7 149*4 154. 2 16*2 30 9 154. 2 16* 2 3.9 4

165 R 149.0 151.4 153.0 146.4 150. 0 13.7 2.9 149.9* 13. 8 2.5 5 166 H 167.4 167. 4X 1 4.3 163. 4X 13.2 5.7 2 167 H 155.4 160.0 158.7 156.4 157. 6 11.9 2. 1 159® 4 12. 1 4.3 5 169 I 156.8 155. 8 155.0 149.6 154. 3 1 5. 4 3.2 155* 8 1 5.6 4.4 5 171 H 166.6X 162.2 176.4X 161.7 166. 8X 15.3 6.8 166* 5X 16.3 5.9 5

172 H 157. 1 149. 0 154.4 149*2 152. 4 13. 1 4.0 153* 9 13.7 4.7 5 173 H 154. 1 153. 4 149*2 155.8 153. 1 1 0.4 2. 8 •1 53* 3 10.5 2.5 5 174 H 160.2 155.2 156.2 159.6 157. 8 15.4 2.5 157* 8 15.8 2. 1 5 175 H 156.7 158.7 155.9 157.8 157. 3 13.3 1.2 156. 8 14. 1 1.5 5 176 H 162.6 157.9 149.3 14 3.7 153© 4 14.9 8.5 153* 9 15*6 7.5X 5

8
LINERBOARD 69J2 COLLABORATIVE REFERENCE PROGRAM JULY 1979 REPORT NO. 118 BURSTING STRENGTH (MULLEN), PSI LAB MEANS TB)IS MONTH THIS MONTH CUMULATIVE

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

177 H 159.0 158.5 161.9 158.9 159.6 14. 1 1.6 158.5 14® 3 2® 8 5 102 H 162.5 157.9 154. 7S 143.8 154. 8 17.9 8.0 155. 4 17® 6 7. IX 5 184 H 157.2 155. 1 150.7 155.4 154. 6 13.6 2.8 154. 6 1 30 6 2. 8 4 186 H 153.2 154.5 157.7 154.6 155.0 12.5 1.9 153.3 1 3® 0 4. 2 5 188 I 154.1 154.8 156.3 155.9 155.3 12.7 1.0 155. 7 1 2C 4 1.2 5

250 L 177. ex 155.2 156.7 153.0S 160. 7 20.5 1 1.5 163.3X 15*7 11® 6X 5 274 H 154.7 157.8 156.0 156.4 156. 2 12.0 1.3 156. 6 1 1© 8 1.3 5 283 H 154.2 156.3 154.9 158.6 156. 0 10.7 1.9 156. 0 1 0© 6 1.7 5 287 A 17e.7X 167. OX 176. 4X 176. 9X 174. ex 17.0 5. 3 171. 2X 1 5© 6 9. IX 5 350 H 157.6 152.8 153. 1 145.5 152. 3 15.0 5.0 153. 2 15.5 4. 8 5

553 M 161.7 157.5 159.7 160.9 160. 0 11.9 1.9 160. 3 12® 3 1.7 5 562 A 176. 4X 166. 7X 169.3X 166.6 169. ax 16.5 4.6 169. 3X 16. 4 4. 1 5 56 8 I 156.7 150.3 158.6 152.7 154.6 14.2 3.7 154. 0 14© 3 3.5 5 569 A 156.3 153.5 158.8 160.6 157. 3 14.8 3. 1 157. 1 14© 2 2.7 5 658 H 160.8 162.7 163.9 166. 1 163. 4X 16.8 2.2 162. 7* 1 5o 6 2.4 5 682 H 165. OX 177. 2X 174. 7X 1 80® OX 174. 2X 14.8 6.5 174. 2X 14® 8 6.5 4 701 H 151.5 154.6 151.3 152.5 17.7 1.8 151.7 17.0 2.2 4

GRAND AVERAGES

WK-1 WK-2 WK-3 WK-4 THIS MONTH CUMULATIVE 5 WEEKS

AV MEAN 156.0 155.6 155.6 155.9 AV MEAN 155o 8 155.8

AV SDR 13.6 13. 9 1

0 6 130 8 AV SDR 13.7 13.8

SD LABS 3. 5 3.5 3.9 5. 1 SD LABS 4© 0 4.0

N0. INCL 62 60 61 62 NO© INCL 61© 2 6 1.6

NO® 0M IT 9 1

10 8 AV SDWKS 3. 5 3.1 NOT RCD 1 1 1 2 SD CUM MEAN 2.7

9
C0RRUG. MEDIUM 26D2 C6LLAB6RATIVE REFERENCE PROGRAM JULY 1979 REPORT NO, 118 FLAT CRUSB STRENGTH (CONCORA), LB LAB MEANS 7BIS MONTH THIS MONTH CUMULATIVE

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

100 74,0 74.1 74.1 73.2 73. 8 4.5 .4 73. 7 4© i .5 8 102 72.5 72.5 72.4 72. 5 2.5 . 1 72.6 2© 9 .5 7 105 74,7 77.8 79. 6X 81. 9X 78. 5 4.5 3.0 76. 8 4.2 2.9 8 106 72,5 72.6 72.7 73.8 72.9 3.6 .6 73. 2 3© 5 .8 8 110 72,2 73.8 72.5 73.6 73.0 3.5 .8 73.6 3.6 1.1 8

113 71,2 72. 0 71.6 71.6 71.6 2.5 .3 71.9 2.8 .4 8 114 71.0 68.7 71.7 70.5 70.5 3. 1 1.3 70.7 3.2 1.0 8 115 73.9 72.5 75.0 74. 1 73.9 3. 3 1.0 74. 5 3.5 1.2 7 119 7C.8 67.5 69.9 69.3 69. 4 3.5 1.4 69o 9 4.5 1.5 8 120 70.7 68.4 71.4 69.9 70. 1 3.0 1.3 70. 2 J.3 1.1 7

125 79. 3X 75.3 76.5 77.8 77. 2 4.8 1.7 78. 8* 50 5X 2.3 8 128 72.4 74. 1 72.7 74.2 73.4 3.3 .9 72o 8 30 4 1.0 8 136 76. 1 74.5 73.7 7 0.3 73. 7 4.3 2.4 73.7 4.3 2.4 4 138 77.1 77. 2S 73.5 74. 8 75. 7 4.5 1.8 75. 2 4.5 1.7 7 140 7e. i 80. 2X 78.3 78. 1 78.7 3.9 1.0 77. 4* 4.4 1.7 8

143 72.2 72.0 72.1 72.3 72.2 2.6 . 1 72. 8 2©7 .9 8 151 63. 4X 69.5 68.5 67. 1 3.5 3.3 67. 1* 3.5 3.3 3 161 71.5 71.6 72.8 74.0 72. 5 4.8 1.2 73. 1 4© 9 2.9 8 167 7C.7 71.4 71.0 7 2.6 71. 5 3.9 .8 72.0 3© 5 1.0 8 177 72.2 69.6 72.2 71.4 71.4 3.7 1.2 7 1 o 5 3. 6 1.3 8

182 77.9 76.3 79.1 74.2 76o 9 3.5 2. 1 77.6* 4. 1 1.6 8 168 73.5 72. 8 71. 8 7C.9 72. 3 3.4 1.1 73. 2 3.8 1.5 8 250 71.8 72.4 71.2 71. 8 2.5 .6 71.6 2© 4 .7 4 269 69.9 73.9 72.2 7 1.8 72. 0 3.4 1.6 72. 0 3.7 1.2 8 274 72.9 73.0 72.6 73.2 72.9 3.0 .3 73.0 3© 0 .2 8 283 72.3 70.5 69. 1 70 o 3 70.6 2.8 1.3 70 o 9 3© 0 1.3 7 284 7 1.6 70.5 71.9 72.8 71.7 3.2 1.0 71. 3 3.6 1.7 8 287 73.9 72. 8 75.9 74.5 74. 3 4. 1 1.3 74. 5 3.9 2.2 8 289 55. ax 55. 6X 49. 8X 52.3X 53. 4X 2.9 2.9 60. 5X 2.8 e.ox 8 292 6 1.4X 65.8 69.7 69.8 66.7 3.3 4.0 67. 1* 3.5 4.5X 8

350 88.4XS 86. 3X 84. 4X 82. 2X 850 3X 5. 0 2.6 84. 3X 4.6 4.5X 8 351 72. 1 71.9 71.3 72.7 72© 0 2.5 .6 7 1 o 9 2o 5 .9 8 353 74.7 71.0 74.4 7 4o 6 73.7 4. 1 1.8 72. 9 3.6 1.6 8 355 72.8 74.0 75.4 7 1.6 73. 5 2.8 1.6 730 6 3© 1 1.2 8 357 74.0 76o 1 77.5 75.9 4.2 1.7 75. 4 4. 0 1.7 7

36 1 72.7 68. 1 70.9 70.2 70. 5 3.3 1.9 70.7 3© 0 1.4 8 363 70. 1 71.6 67.3 69.8 69.7 3.3 1.8 68.7 3.2 2.7 8 365 71.6 72. 1 68.4 7 1.6 70o 9 3. 1 1.7 70. 8 3. 1 1.3 8 367 73. 1 74.6 70.8 71.9 72.6 4. 1 1.6 73. 7 4© 2 2.0 8 369 72.0 72.3 72. 1 72. 8 72.3 3.2 .3 72o 7 3© 3 .7 8 377 76.7 76.3 73.4 76.7 75c 8 3.9 1.6 75. 5 4© 0 1.6 7 379 74.

e

75.2 72.0 74.0 3. 8 1.7 73. 2 4.3 1.3 7 381 71.9 71.4 70.6 71. 3 3. 8 .7 71.2 3.7 .7 6 383 75.2 82.9XS 82. IX 75. 1 78. 8 4.7 4.2 75. 3 4© 0 4.7X 8 385 81. OX 72.6 71. OS 74.0 74.7 5. 1 4.4 74. 1 4© 8 3.5X 8 387 71.3 75.5 74.4 73.3 73.6 4.0 1.8 73. 1 4.0 1.9 8 391 67.4 61. 9X 71.2 67.3 66. 9 2.8 3. 8 67o 2* 3. 0 2.9 8 393 70.

e

69.9 71.0 7 0. 1 70.5 3.2 .5 71. 1 3.9 .8 8 395 73.0 74.0 72.9 74.2 73. 5 3.3 .7 73o 1 3© 5 1.0 8 397 73.6 74. 1 75.4 75.9 74.7 3. 8 1. 1 74. 1 3© 6 1.2 8

39 9 73.8 73.8 74.6 73.9 74. 0 4. 1 .4 73. 8 3.9 .9 8 553 74.3 71.2 71.9 72. 1 72.4 2.7 1.3 72. 6 2.7 1. 1 8 555 73.2 75.4 75.5 74.3 74.6 2.5 1. 1 74.6 2.5 2.3 8 56 2 72.8 71.3 70.8 72.8 71.9 3. 1 1.0 71.3 3.7 1.4 8 56 8 68.3 65.7 70.6 66.9 67. 9 3.7 2. 1 70. 2 3. 5 2.9 8

10
CORRUG. MEDIUM 2602 COLLABORATIVE REFERENCE PROGRAM JOLT 1979 REPORT NO. 118 FLAT CRUSH STRENGTH (CONCORA). LB LAB MEANS THIS MeNTB THIS MONTH CUMULATIVE

CODE V HI-1 WE-2 WK-3 HI —MEAN SOR SDWKS MEAN SDH SDHKS WKS

572 7e.5 75.2 74.7 70.6 74. 8 4.0 3.2 75.3 3.8 2.5 8 578 76.7 69.5 40.9X 73.8 65. 2X 4.4 16.5 67. 4* 4.7 12.4X 8 609 76.2 74.5 72.5 70.9 73.6 3.7 2.3 71. 5 3. 8 2.9 8 614 69.4 69.6 66.9 68.7 3.4 1.5 68© 7 3.4 1.5 3 617 ei.oxs 85. 1XS 82.5XS so.ox 82. 2X 6.3 2.2 81. 9X 6.7X 2.6 8

®K = 1 WK-2 WK-3 HI—

THIS

GRAND

MONTH AVERAGES CUMULATIVE 8 WEEKS

AV MEAN 73. 1 72.4 72.6 72.5 AV MEAN 72.6 72.7

AV SDR 3. 6 3.5 3.5 3.5 AV SDR 3.5 3.6

SD LABS 2.4 2.7 2o 5 2.3 SD LABS 2.5 2.4

NO. INCL 51 53 53 53 NO© INCL 52. 5 52 0 6

NO. OMIT 7 6 6 4 AV SDWKS 1.8 1.5 NOT RCD 2 1 1 3 SD CUM MEAN 2.4

SD SHTS 2.4 2. 0 2.0 2.0

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

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. FKBG CRP 118

2. Gov't Accession No.

. ,

N

| Wmplpl ' |

3. ftecipi ent' $ Access ion No.

4. TITLE AND SUBTITLE

CONTAINERBOARD

Collaborative Reference Program for Containerboard

Report # 118

5. Publication Date

Sept. 18, 1979

6. Performing Organization Code

7. AUTHOR(S)

T. L. Cummings, J. Horlick

8. Performing Organ. Report No. NBSIR 79-1809

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, DC 20234

10. Project/Task/Work Unit No.

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 American Paper Institute/

Fourdrinier Kraft Board Group

13. Type of Report & Period Covered Final

i4. 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 si ghificant 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

For Official Distribution. Do Not Release to NTIS

I 1 Order From Sup. of Doc., U.S. Government Printing Office, Washington, DC

20402, SD Stock No. SN003-003-

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

U S CO MM- D C

I«iI