NAT'L INST. OF STAND & TECH

N8S

puhli - cations

A11107 3fl573b CONTAINER

BOARD

report no. 124

January 1980

R NBSIR 80-1828

NBS Collaborative Reference

Program for Containerboard

Fourdrinier Kraft Board Group

American Paper Institute, Inc.

and U.S. Department of

Commerce, National Bureau

of Standards

pQC

100

.U56

80-1828

1980

k J
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 BUBKA

OB STANDARDS

LIBRARY SEP 1 9 1980

CONTAINER

BOARD

Collaborative Reference

Program for

Containerboard

report no. 124

January 1980

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.

NBSIR 80-1828

> •
fr.
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) . CTS is a non-profit organization of

associations that offers CRPs to a wide range o* 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. Cummings or Jeffrey Horlick

on (301) 921-2946.

Jeffrey Horlick, Technical Administrator

NBS Collaborative Reference Programs

Office of Testing Laboratory Evaluation Technology

February 28, 1980

TABLE OF CONTENTS

Explanation of Tables

Instrument Codes

Use of Average Mean as a Reference Standard

Bursting Strength, Linerboard 42L1, weeks 1-4

Bursting Strength, Linerboard 69M1, weeks 1-4

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 M0NTH

WEEKLY VALUES : C0DE 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 -labor

a

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 MONTH CUMULATIVE 12 WEEKS

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

CUMULATIVE - Averages

weeks of

for the indicated number of weeks

,

the current month.

including the four

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

A

H

IJ

L

M

N

R

X

Y

Z

INSTRUMENT CODES

FOR

MULLEN BURST OF LINERBOARD

(Column V)

Description

Model A, 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

Lhomargy, Hydraulic Clamp, in psi

Model A, Air Clamp added

Other Model, Please Describe Instrument

Make and Model

Nonstandard Instrument or Method

Data received too late to be included

in statistical anaylsis

INSTRUMENT CODES

FOR

CONCORA TEST OF MEDIUM

(Column V)

Code Description

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 September 1978 -

5
LINRRBflARD 42L1 COLLABORATIVE REFERENCE PROGRAM JANUARY 1986

REPORT NO® 124

BURSTING STRENGTH (MULLEN), PSI

TAB MEANS THIS MflNTH THIS MONTH CUMULATIVE

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

10 0 H 1 15- 4 1 1 5, 6 1 16* 2 1 13® 7 1 15® 2 7, 3 1, 1 1 14, 8 6, 2 o 8 16

102 8 1 10, 1 111,2 1 12. 8 113,0 111,8 6, 9 1, 4 1 13, 2 6.6 2, 5 14

10 3 t 1 16,, 0 1 1 5, 2 1 1 4, 0 1 14, 2 1 14, 9 5, 4 o 9 1 14, 8 5, 3X .9 16

10 5 M 11 2-

2

1 12, 7 1 l 4, 3 1 13, 1 7® e 1, 1 1 14. 4 7.9 4® 1 15

106 H 1 17,2 1 18, 1 1 1 6, 5 1 18, 3 1 17. 5 5. 5 . 8 1 18. 0 6® 8 2. 3 16

109 H 112,5 126, 1 121, 5X 1 16® 1 1 17® 5 7, 6 4® 1 1 14, 1 7® 7 4, 4X 16

11 0 M 114(6 1 14, 8 1 l 2, 1 1 15, 7 i 14* 3 8, 6 1.6 1 15. 1 7,6 1. 3 16

11 1 M 1 18*2 1 17, 7 l 16, 1 113,0 1 16. 3 7, 8 2. 3 1 15. 0 7.3 U9 16

11 2 H 1 10,9 111,1 111,1 112.8 1 1 1, 2 5® 6 1, 2 111,3 5. 2 X 2, 5 16

11 3 R 1 1 4, 8 1 16, 5 £ 1 5. 4 1 14, 7 1 15, 4 5, 6 ,8 1 16, 6 6. 5 1.6 16

11 4 M 116,9 1 16, 2 1 16, 3 1 16, 2 1 16. 4 6, 7 ,3 1 !6 0 5 6® 8 2® 6 15

11 5 R 1 15, 7 1 17, 7 1 14,7 1 13, 8 1 15, 5 6® 4 1,7 1 18. 1 5® 5 2® 8 16

11 7 H 1 1 0, 1 1 1 l, 0 111,7 1 10,6 1 10, 9 6, 3 ,7 111,1* 6® 8 1,6 16

11 9 H 1 15, 6 120, 4S 116, IS 1 17, 4 1 1® 6 2. 7 1 14® 9 8, 1 2.7 13

120 R 1 1 lo 3 1 1 1, 6 ! 08, 8

X

1 12,9 111,2 7, 0 1,7 111,4 6,9 4, 3 1 5

12 1 M 1 15, 6S 1 16, 3 118,9 118,9 1 17. 5 8, 6 1. 7 1 15® 5 7.2 2,7 16

125 I 1 19, 1 121, 8 1 14. 1 l 20® 0 1 l 8, 8 6. 9 3. 3 1 19 c 0 7. 0 2.7 16

127 H 1 1 5, 2 1 15, 7 1 16, 3 1 15, 9 1 15, 8 T, 5 c 5 114,5 6. 6 2.2 16

128 H 1 18, 1 117,9 1 15. 0 1 13. 0 1 16. 0 7, 2 2. 5 1 14,

4

7.8 2.3 16

130 H 1 180 2 1 18. 2 1 14. 4 115,2 1 16® 5 8® 4 2.0 1 16,5 7.8 1.9 16

13 1 R 1 13, 7 1 10, 5 1 16. 5 111.9 1 1

3

e 1 7,5 2® 6 1 12® 2 7.2 3,5 16

133 A 115, 1 1 15, 7 1 16® 0 1 1 3. 7 1 15. 2 6, 3 1*0 1 16, 2 6.6 2.9 1 5 134 H 1 18c I 113,9 1 14® 5 1 1 5, 6 1 15. 5 5,9 1. 8 1 18,0 6.4 2.8 15

135 I 1 20, 9 120® 9X 6, 0 1 19. 0 6,9 4, 7X 13

136 H 1 1 le 1 111,9 1 15. 6 1 1 4. 3 1 1 3. 2 7® 5 2. 1 112,2 6, 8 2® 1 16

137 H 1 18« 2 1 1 8, 0 1 1 3, 2 1 16. 5 8, 3 2® 8 1 20. 7X 7. 8 3, 3 15

138 H 1 18*5 1 1 5, 1 117, 4 1 16,3 1 16. 8 8, 1 1® 5 118.1 7.9 1.7 16

139 R 106, 4X 1 12, 5 108® OX 1 1 2, 3 109, 8X 7.9 3. 1 1 16® 8 7.3 6.7X 16

140 H 1 10, 3 1 14, 2 111.8 1 14, 9S 1 12® 8 7, 2 2. 1 1 12, 1 5.6 1. 3 16

14 1 M 1 1 4, 4 1 1 3, 7 1 14, 9 1 14,0 1 1 4. 3 5. 5 ,5 1 14, 4 5. 8 .8 16

14 2 A 112,8 1 1 2, 2 l 13,6 1 10. 5 1 12, 3 6. 2 1,3 111.1* 6.2 1.9 16

145 H 1 15, 3 113, 1 116, 2 115.9 1 15® 1 7,4 1. 4 1 14. 0 6.7 2.7 15

147 H 1 12. 4 111,0 1 09. 8 1 13. 3 111,6 5, 7 1,6 1 13® 3 6, 8 1.9 16

149 H 1 14, 6 1 190 6 1 17. 0 l20o 3 l 17® 9 7,7 2. 6 1 17* 8 7,3 3® 7 15

15 1 H 118,7 1 17, 7 120, 1 1 16.9 1 18, 4 6. 7 1, 4 1 16® 4 7.0 2® 2 15

153 H 1 14, 8 1 15, OS 1 14, 3 1 14. 4 1 1 4, 6 4. 3 ® 3 a 18® 4 6*3 6® 2X 16

155 H 1 20, 8 117,0 1 16. 7 i 18, 7 1 1 8, 3 7,0 1® 9 1 16® 1 7.6 2.2 16

157 H 1 15,9 12 1, 6 I 13. 9 1 19, 3 1 17. 7 7. 7 3.4 1 17® 0 7. 1 2.9 16

16 1 X 117,1 114, 1 1 1 5, 2 1 22. OX 1 17, 1 7,7 3. 5 1 16. 9 7.2 2. 9 16

163 H 1 16,9 1 16. 8 1 3 6, 9 7,6 .0 1 14® 5 7. 1 2, 8 12

165 R 1 12, 3 112,7 1 l 5. 2 1 15® 1 1 1 3. 8 8. 4 1.6 1 14. 2 0. 0 1*6 1 5 167 H 1 14, 4 1 12, 3 1 14® 3 1 1 0. 6 1 12® 9 5.4 1® 8 1 12. 3 6. 1 2.3 16

169 I 1 1 8,7 1 15® 4 1 16. 1 1 12. 1 3 15. 6 7,4 2,7 1 14. 3 6.7 2. 7 15

171 H 1 13,0 1 1 3® 4 11 1,0 1 1 5, 9 1 13, 3 7,2 2® 0 1 14,5 7. 1 1.8 15

172 H 1 15, 4 1 16. 0 1 14, 2 1 1 5. 3 a is, 3 6® 7 *7 1 13. 8 6,5 1.9 16

173 H 1 14, 6 1 17® 4 1 16, 0 6.9 1.9 1 15.9 4® 9X 1.3 12

174 H 1 14,0 1 18, 6 1 1 3® 2 1 1 6® 7 1 1 5® 7 6® 5 2.5 115,9 6.7 2® 4 16

175 H 111,6 115.6 1 14, 4 115.9 1 14, 4 8® 4 2. 0 1 14® 9 8. 1 2,7 16

176 H 1 14,6 1 14. 5 1 13, 0 1 12. 3 113,6 6® 8 1, 1 1 15® 0 7,4 1.9 16

177 H 1 1 4, 3 1 15. 8 1 13, 8 118® 2 1 15® 5 6, 0 1.9 1 12. 1 7.5 3,5 15

182 H 119,2 1 17. 7 1 16. 0 1 15® 3 1 17, 1 6, 8 1. 8 1 17. 6 7® 6 2® 5 16

184 H 1 16, 4 1 08. 8 a 16. 3 1 16® 0 1 34, 4 7,6 3.7 1 16, 1 7.6 3.6 15

186 I 1 18, 3 1 19. 3 1 1 8, 4 1 18, 4 1 18, 6 7,7 ® 5 1 15® 8 6® 8 3, 6 16

188 I 1 16, 1 1 14. 8 1 13, 1 115, 1 114, 8 6,7 U2 1 15® 5 6® 8 1.7 16

198 R 117,9 1 15, 7 a i 8, o 1 18*7 1 17® 6 7, 2 1. 3 1 16. 7 7. 1 2.3 15

6
LTNERBOAED 42L1 COLLABORATIVE REFERENCE PROGRAM

REPORT NO, 124

BURSTING STRENGTH { MULLEN )„ PSI

JANUARY 1980

IAB MEANS THI £ MONTH THIS MONTH CUMULATIVE

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

25 0 N 112.2 11 la 5 1 13, 0 114, 3 1 12, 8 8, 6 1, 1 1 07. 6X 9. OX 5. 3X 14

28 3 H 115. 2 l 17, e 1 16, 5 1 16, 5 5, 8 1,3 1 17, 6 6,7 2.0 15

28 T A 121,9s 127, 6X 127, IX 128, 4X 126, 3X 9, 6 2. 9 123.6X 8, 1 3.9 16

32 7 M 1 1 3, 9 110, 2 1 17,6 1 13, 9 7,4 3.7 1 16. 1 8, 5 3.4 7

35 9 W 118, 8 115,5 115,4 1 16, 6 6,6 1,9 1 1 6o 6 6,6 1.9 3

553 M 117,9 116, 1 117, 3 121, 4X 1 18, 2 8, 1 2.3 1 16, 1 7,6 2. 3 16

562 A 119,6 128, 5X 128, 3X 108, 6X 1 21, 3X 7, 2 9, 4 126.2X 8.2 6.6X 16

56 8 I 1 08. 4 113,9 115, 0 1 17,0 1 13, 6 7.4 3,7 1 12.5 7.6 2,9 16

569 A 125, 2X 118, 1 116,5 1 14, 8 1 1 8, 7 7, 5 4.6 121, 5X 7.7 5. OX 14

65 8 H 113, 3 118, 0 1 1 7o 6 1 13,9 1 15, 7 6, 8 2.5 116, 4 7.6 1.8 16

701 H 117-4 113, 6 114,0 1 14,9 1 15, 0 8, 1 1,7 1 16,4 8.0 1,8 16

GRAND AVERAGE9

WK-1 MX -2 WK-3 WK-4 THIS MONTH CUMULATIVE 16 WEEKS

AV MEAN 1 15,5 1 15, 5 1 15, 0 115,2 AV MEAN 115, 3 1 15o 2 AV SDR 7.0 7. 1 6.9 6,7 AV SDR 6, 9 6.9

SD LABS 3, 0 2,9 2, 1 2.3 SD LABS 2.6 3.2

NO. INCL 60 60 54 57 NO. INCL 57. 7 60.4

NO. OMIT 4 4 7 5 AV SDWKS 2. 0 2.3

NOT RCD 2 2 5 4 SD CUM MEAN 2. 0

7
LI NERB0A FD 69M1 COLLABORATIVE REFERENCE PROGRAM JANUARY 1980

REPORT NO. 124

BURSTING STRENGTH ( MULLEN 5. PST

LAB MEANS THIS MONTH

C«DE V VrK- 1 WK-2 WK-3 WK-4

100 H 14 4 c 2 14 4, » 1 43, 6 143® 0 102 H 1 4 Oo 5 138® 3 13 8® 3 140. 9

103 I 1 43n 4 1430 6 l 43® 5 146,9

105 M 14 1.9 1 37® 3 142, 1 106 H 1 4 3, 9 142® 9 152® 0 147® 8

109 H 14 3., 3 148® e 147® 4 145,4

11* M 139, 0 136® 9S 145® 5 148® 3

11 1 M 146, 7 1 42® 5 151,0 149, 1 11 2 H 147, 3 149, 4S 150® 7 150® 3

11 3 R 14 5, 9 145® 4 144® 9 146® 8

1 1 4 M 1 47® 7 143® 4 143® 6 145, 1

1 1 5 R 147- 2 146® 2 146® 2 148, 7 117 H 139, 1 14 1,6 140, 2 1420 1 11 9 H 148® 4 138® 9 135, 9 120 R 135, 0 144, 4 138, 5 137, 2

12 1 M 149® 2 147® 3 142® 2 144. 5

125 I 150® 2 14 7, 0 149® 7 149,3

127 H 1 46 o 2 146® 9 1 470 5 146, 4 128 H 145, 1 147® 6 147® 3 14 2,6

130 H 146, 3 147® 2 147® 9 152,5

13 1 S 137, 2 138® 6 144® 2 133.5X

133 A 149, 0 146® 9 150® 2 147,6

134 H 142, 4 14 3® 3 14 8® 5 145® 3 13 5 I 155® 2 136 Ft 140, 2 1 44® 3 145, 0 137.3

137 H 1 46, as 156® 4X 138.7

138 H 1 47. 7 146, 4 146® 6 152,0

139 R 148, 3 149® 4 147® 4 148. 2

S 4 0 H 1 47® 9 15 2® 6 148® 4 147,0

14 1 M 145® 1 144® 5 146® 7 147® 2

142 A 136, 0 140® 0 143, 9 145,5

145 H 1 42, 7 138, 5 151,9 134® 7X

147 H 144, 1 145. 6 146, 4 148® 2 149 H 14 1, 3 148,6 145® 2 148® 6

15 1 H 146, 0 145® 2 147, 3 148.6

153 H 1 39, 7 1 40® 5 144, 4 144,6

155 H 154, 5 1 53® 0 149® 5 151.0

157 H 148, 3 147® 5 139, 6 1 4 5® 5

16 1 X 139, 7 146. 5 144® 0 145® 1 163 H 15 1,0 147® 7

165 R 144, 0 14 2. 0 143. 2 149,9

167 H 147® 8 141® 7 147, 4 148,9

169 I 140,5 147. 0 141,8 142,7

17 1 H I52 0 9 147. 3 151.8 147. 3 172 H 144, 2 141® 5 14 7. 5 141*7

173 H 145, 8 146.9

174 H 1430 3 146, 8 144,9 146. 0 175 H 145® 5 146® 7 143. 7 147® 1 176 H 14 0® 3 14 1® 1 138.6 137.7

177 H 151,5 155, 2X 155® 1 151. 5

182 H 142, 1 142, 4 142. 4 146. 3 184 H 147, 8 140. 9 146, 7 139. 1 186 T 148® 1 148® 7 1 48, 6 1 47® 9

188 I 148,0 142® 4 142® 6 144,7

198 R 147,6 142, 4 137, 0 147.0

THIS MONTH CUMULATIVE

MEAN SDR SDWKS MEAN SDR SDMKS WKS

143. 9 9. 0 « 8 144® 8 9. 5 1.7 10

139. 5 10. 2 1.4 1 45® 9 9,6 7. 2 9

1 440 4 10.7 1, 7 1 43® 6 10® 2 1.8 1 0 140. 5 1 4 . 3 2.7 1 4 1 o 6 1 3. 5 3 . 3 9

146. 7 9,0 4 . 1 146, 1 9.9 4.9 10

146® 2 13,0 2. 4 143® 8 13,9 3,7 10

14 2® 5 1 3, 0 5® 4 144, 1 12.0 4 . 1 10

14 7. 3 1 3, 9 3® 7 145® 2 1 3,3 4.4 10

149® 4 6, 6 1 . 5 148® 2 6, 6 X 1.6 i 10

14 5® 8 9, 8 , 8 148 ® 0 10.2 3.9 10

145* 0 1 1. 0 2® 0 145.7 1 2. 3 , 1 ® 7 1 0 147. 1 1 0, 0 1.2 151,3* 8.7 4.3 1 0

1 4 0® 8 10® 2 1.3 139, 2* 10,9 4. 1 1 0 141. 1 9. 6 6. 6 1 43® 4 1 3,5 4,5 8

1 33® 8 9. 5 4. 0 141.4 1 1® 9 5. 1 1 0

145® 8 12,9 3, 1 147® 8 1 I . 1 3,2 10

149. 1 9, 8 1.4 146. 1 10,8 4. 2 10

146. 8 10, 3 .6 146® 3 9,7 2,0 lO

1 45. 6 1 1® 5 2. 3 143® 2 12. 1 3.2 1 0 148, 5 10. 9 2® 8 147. 2 1 2, 3 3, 2 1 0

138® 4 1 3® 9 4 . 4 137, 6X 1 2, 3 3. 8 1 0 148, 5 1 1. 7 1, 5 149. 5 l 2, 5 1.9 9

144® 9 9® 7 2,7 148® 1 9.9 3, 7 9

155. 2X 13,6 150. 5 1 0® 8 7.5 7 141. 7 12, 3 3® 6 1 39, 1 * 10, 1 3.9 8

14 7® 3 16® 1 e, b 151,0* 15.0 6. 7 9

148, 2 14, 2 2.6 146® 7 1 3® 2 2,5 1 0 148® 3 i a. e . 8 149* 7 1 2. 3 4.6 10

1 48. 9 6, 6 2,5 149® 1 7.9 1.7 1 0 145® 9 7. 6 I , 3 144® 4 8® 6 2. 1 10

141® 4 1 0, 9 4® 3 140® 9 10.0 3. 7 1 0

142. 0 1 1. 4 7,4 144® 0 10.0 6,4 lO

146® 1 1 3® 2 1® 7 145.5 1 2® 0 1.6 10

146® C 1 3. 3 3. 5 145. 3 13.5 2.7 10

146® 8 12, 5 1 . 5 1 46 . 4 10.9 1.3 10

142® 3 1 1,6 2,6 146 , 1 10.7 7.8 10 152® 0 15.7 2. 2 149.5 14,9 2.7 10

14 5. 2 1 2.9 3® 9 143. 8 13, 3 3.2 10

143. 8 1 3® 0 2. 9 145, 6 1 2,6 2.7 10

149® 4 10® 1 2® 4 146, 1 1 1,2 4.7 6

144. 8 1 0. 6 3® 5 144. 7 l 1,9 2.7 1 0

1 46. 5 1 0. 8 3, 2 147 ® 4 12® 2 2.5 1 0

1 43. 0 1 2® 0 2® 8 143, 0 1 1 ® 8 2.5 1 0

1 49. 8 12. 3 2® 9 148. 3 10.6 2,6 9

a 43. 7 14, 0 2® 8 141.6 13. 1 3. 1 10

146® 4 10.6 o 8 146,3 9.3 .6 5

1 45® 3 13® 2 1.5 142. 2 13. 0 5® 1 1 0 145® 8 12® 2 1, 5 146.5 1 2. 1 3. 1 1 0 139® 4 11,9 1® 5 1 42® 8 1 2® 6 4® 1 1 0 153® 3X 1 1® 9 2. 1 146® 7 12,6 7,9 1 0

1 43® 3 12. 1 2 ® 0 143. 5 13,7 2.8 1 0 143® 6 12* 1 4® 3 143® 5 1 1.9 6,0 9

148® 3 1 0® 1 .4 144. 7 10 ® 1 3. 5 1 0 144, 4 8. 2 2, 6 145® 5 9,2 2,2 10

143® 5 9.2 4® 9 1 44* 0 1 0. 2 6® 1 8

8
LI NERBOA RD 69M1 COLLABORATIVE REFERENCE PROGRAM

REPORT NO, 124

BURSTING STRENGTH (MULLEN), PSI

JANUARY 1980

LAB MEANS THIS MONTH THIS MONTH CUMULATIVE

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

25 0 N 1470 8 147, 9 141,6 150, 5 147, 0 14, 3 3. 8 140, 6 1 4, 0 6,5 10

28 3 H 144r 5 147,9 14 3, 3 145, 2 8. 8 2, 4 149, 9 10, 1 A. 3 9

287 A 162, 2X 156, IX 152,3 164, OX 158, 7X 13,9 5. 4 154, OX 1 30 6 5,5 10

327 M 143, 2 142, 1 139, 4 141® 6 1 3, 6 1.9 145. 8 1 3, 7 4, 1 9

35 9 R 145,7 148,0 145, 1 146, 3 1 5, 9 1.6 146. 3 15, 9X 1.6 3

55 3 M 148,9 140, 0 144, 3 139, 4 143. 2 12, 0 4.4 144. 2 1 1.6 3, 6 1 0 562 A 141, 8 157, 3X 156, IX 132, 3X 146® 9 10, 7 12. 0 151. 5* 12,0 8. 7X 1 0 568 I 1 38c 9 148, 8 144,7 150, 3 145, 7 12. 9 5, 1 1 41o 3 1 2. 6 5. 7 10

56 9 A 138o 4 150, 6 141,9 136,3 141, 8 14. 1 6.3 144,7 13,9 6.7 10

65 8 H 144c 8 148,3 147, 5 146, 1 146. 7 8, 6 1. 5 148, 2 10,5 5.1 10

701 H 147,0 146,7 145, 8 140, 8 145, 1 13. 2 2,9 146,0 13.2 2,9 10

GRAND AVERAGES

WK-1 1SK-2 WK-3 W&-4 THIS MONTH CUMULATIVE 10 REEKS

AV MEAN 145, 1 144, e 145.5 145.5 AV MEAN 145, 2 145.4

AV SDR 11.5 11,4 1 1. 2 11,5 AV SDR 1 1,4 1 1.5

SD LABS 4.3 3.8 4, 0 4.0 SD LABS 4, 0 4.6

NO- TNCL 61 58 58 56 NO. INCL 58. 2 61.3

NO. OMIT 3 6 3 6 AV SDWKS 3, 0 3. 8 NOT RCD 2 2 5 4 SD CUM MEAN 2.8

9
C8RRUG MEDIUM 26D3 COLLABORATIVE REFERENCE PROGRAM JANUARY 1980

REPORT N0® 124

FLAT CRUSH STRENGTH ( CONCORA } LB

LAB MEANS THIS MONTH

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

100 72. 2 72, 9 72.3 72® 7 102 7 2, 8 73, 6 72, 4 72® 4 105 73, 9 72, 7 106 7 3, 1 73® 0 72. 0 7 2® 5

11 0 74, 2 7 1,3 74.3 7 2® 6

11 3 72, 8 73® 2 72, 0 72,3

11 4 70, 8 72,2 71,9 70,3

m 5 73,4 TO, 9 69. 4 72*8

n o 68. 0 6 8* 8 69® 3 120 71,8 71, 5 70® 2 71. 1

125 80. 9X 8 1® 6X 79. 9XS 79® 2X

12 8 71,5 7 3, 9 72* 5 7 2® 1 136 71, 1 71® 7 69,9 71,5

138 77o 5 75, 6 77, 2 74® 4 140 72, 2 74® 4 73, 4 73® 8

151 7 2o 5 73® 0 72. 0 72® 6

16 1 71,9 7 1® 5 76,4 79® 8XS

163 68,9

164 72, 5 73. 1 7 2® 6 7 2® 8

167 71,7 7 1,6 71.4 7 1 ® 6

177 7 1,1 68® 8 68, 2 71*0

182 71,7 72® 6 7 3, 0 7 1 ® 9

18® 70, 0 79, 6 72,9 72, 3

190 72,6 72® 6 70, 1 68. 1 237 71,2 73® 9 73, 1 72® 7

25© 66,8 67. 4 70, 2 67® 3X

26 9 72, 3 70, 0 7 1® 5 71® I 20 3 74*5

28 4 70, 2 70. 0 70, l 7 1 ® 7 28 7 77,0 76® 4 77.7 77® 9X

28 9 7 0, 5 68® 0 70® 9S 75, 3 29 2 7©, 1 66® 9 70, 3 70® 0 32 7 67, 3 67® 4 69, 6 70® 1 35 0 85, 3XS 70, OX 78. 0 87® 3X

351 73, 4 73® 1 74,© 73*9

35 3 72,9 74® 0 76, 8 355 71,7 71® 6 72. 3 70® 1 35 7 67,7 6 8® 3 70, 1 359 89, OX 83* 3XS 80® 3XS

36 1 69, 1 69® 4 69, 5 70® 6

363 72, 2 7 1 ® 6 68® 6 70® 4 365 68, 1 69.9 70® 8 73® 5 36 7 73® 5 75. 8 74® 4 369 73, 2 72® 5 72® 4 73® 6 37 7 73,5 7 2® 1 73,7 74® 7

37 9 74® 9 75® 5 38 1 72® 6 73,3 72® 2 72*2

38 3 74, 2 73,0 70® 3 72® 1 38 5 73. 3 75® 4 70® 2 72® 8 387 76® 6 75® 6 75® 2 74® 4

39 1 69® 9 71® 3 71.8

39 3 75* 8 7 3® 8 74.5 73® 7

39 5 72,7 74® 0 74, 5 75® 0 397 76, © 75® 5 74® 0 7 2. 1 39 9 69® 2 71.0 70® 0 68,4

THIS MONTH CUMULATIVE

MEAN SDR SDWKS MEAN SDR SDUKS WK9

72® 5 4, 5 * 3 72* 5 4® 5 a 3 4 72, 8 3® 3 .6 72.8 3. 3 .6

"

' 4 73* 3 4, 0 * 8 73. 3 4® 8 X .8 * 2 72® 9 2.9 e 2 72® 9 2® 9 .2 4 73® 1 3, 5 i.4 73* 1 3® 5 1.4 4

72® 6 3® 1 .5 72,6 3® 1 *5 4 71, 3 2, 7 e 9 71*3 2,7 .9 4 71® 6 3® 6 1® 8 71,6 3,6 ' 1.8 4 69® 0 3*6 e 3 69*0 3® 6 o 3

' 3

71® 2 3® 0 © 7 71,2 3* 0 .7 4

80® 4X 4* 8 1# 1 SO, 4X 4 ® 8 1. 1 4 72® 5 3® 0 1,0 72. 5 3® 0 1.0 4 71® l 3.7 • 8 71,

1

3® 7 .8 4 76® 2 4* 0 1.4 76* 2* 4. 0 1*4 4 73* 5 4. 4 © 9 73.5 4,4 * 9 4

72, 5 3® 8 © 4 72,5 3® 8 .4 4 74* 9 5* 4 4.0 74® 9 5. 4X 4. OX 4 68® 9 3* 8 68 ® 9 3.8 1 72® 8 3® 9 . 3 72. 8 3.9 .3 4 71® 6 3, 0 » 1 7 1 , 6 3. 0 « 1 4

•fits*

1-' 69, 8 2,6 1.5 69.8 2.6 1,5 4 72, 3 4,6 .6 72 e 3 4.6 .6 4 71® 5 3® 2 1. 4 71® 5 3® 2 1,4 4 70.9 3® 9 2® 2 70,9 3.9 2,2 4 72* 7 4, 0 1 , 1 72.7 4® 0 1® 1 4

67® 9 1*9 1,5 ©7® 9* 1® 9 X 1.5 4 71® 2 3, 5 .9 71*2 3,5 .9 4 74® 5 3® 3 74* 5 3® 3 1 70® 5 4,3 © 8 70.5 4® 3 • a 4 77® 3X 4® 1 .7 77 , 3X 4® 1 .7 4

71* 4 3, 1 2* 8 71, 4 3® 1 2. 8 X 4 69® 4 3.3 1. 6 69® 4 3, 3 1. 6 4 68* 6 4® 5 1,5 68, 6 4.5 1.5 4 82® 2X 5, 1 4® 8 82® 2X 5® IX 4® 8X 4 73* 6 2*6 * 4 73*6 2.6 ©4 4 74*6 2. 6 2, 0 74. 6 2© 6 2.0 3

71® 4 3*5 .9 71,4 3® 5 • 9 4

6 8® 7 3* 4 1® 2 68*7 3.4 1.2 3

84® 2

X

6® 1 4® 4 84, 2X 6® IX 4® 4X 3

69® 7 3, 6 .7 69® 7 3® 6 .7 4 70.7 2® 8 1® 6 70.7 2,8 1*6 4 70® 6 3, 8 2® 2 70,6 3® 8 2.2 4 74® 6 3® 8 1 ® 1 74, 6 3® 8 1® 1 3 72® 9 3® 6 *6 72® 9 3.6 ©6 4 73® 5 3, 4 1 . 1 73. 5 3® 4 1® 1 4

75, 2 5® 0 .5 75® 2 5® OX .5 2 72.6 3, 6 e 5 72® 6 3.6 .5 4 7 2® 4 3® 5 1,6 72® 4 3® 5 1,6 4 73® 0 3® 3 2® 1 73© 0 3*3 2* 1 4 75* 5 3. 8 .9 75® 5 3® 8 «9 4

71® 0 3. 3 1® 0 71 © © 3® 3 l®0 3 74® 5 4® 0 1.0 74© 5 4® 0 1.0 4 74* l 3® 5 1, 0 74® 1 3,5 1® 0 4 74® 6 3® 7 2.0 74® © 3.7 2.0 4 69® 7 3,9 i. 1 69® 7 3,9 *• * 4

10
CORPUG, MEDIUM 2603 COLLABORATIVE REFERENCE PPOORAM

REPORT NO, 124

FLAT CPUSH STRENGTH ( CONCORA ) LB

JANUARY 1980

LAB MEANS THIS MONTH THIS! MONTH CUMULATIVE

CODE V WK-l WK-,2 WK-3 WK-4 MEAN SDR SDWKS MBAN SDR SDWKS WK9

SB 3 7I„7 72, 5 73, 5 74,7 73. 1 3. 5 U3 73, l 3. 5 1.3 4

562 7 1* I 74, 1 69, 2 70,6 71,3 4, 0 2. 1 71,

3

4.0 2, 1 4 56 B 74,0 72, 2 71,3 72. 1 72, 4 3. 8 1, 1 72, 4 3. 8 U 1 4 572 73c 9 72,3 71, 7 72,5 72. 6 2,9 ,9 72.6 2.9 , 9 4 578 75,7 73,7 77, a 73,6 75. 2 30 6 2. 0 75, 2 3.6 2.0 4

60 9 7 3b 7 73,5 71,0 71 0 5 72, 4 3. 4 1.4 72,4 3.4 1.4 4 617 79, IX 75, 2 77, 4S 78, 4X 77. 6 X 4.5 1.7 77. 6 X 4,5 1.7 4

*K-1 WK-2 WK-3 WK-4 THIS

GRAND

MONTH

AVERAGES

CUMULATIVE 4 WEEKS

AT MEAN 72. 2 72, 2 72.5 72.3 AV MEAN 72. 3 72. 3 AV 809 3.6 3.4 3,7 3.5 AV SDR 3, 6 3,6

SO LABS 2.4 2.2 2.6 1.6 SO LABS 2 . 2 2.2

N0: IMCL 54 57 57 49 NO, TNCL 54, 2 54.2

NO, OMIT 4 3 1 7 AV SDWKS 1. 3 1. 1 NOT PCD 4 2 4 6 SD CUM MEAN 1.9

SO SETS 2.3 2,1 2.3 2 . 1

11

NBS-114A (REV. 0-78)

2* Gov't. Accession Hoi

t' ! Hi i

U.S. DEPT. OF COMM.

BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. FKBG CRP 124 if*

3. Recipient's Accession No.

4. TITLE AND SUBTITLE

CONTAINERBOARD

Collaborative Reference Program for Containerboard

Report #124

5. Publication Date February 27, 1980

7. AUTHOR(S)

T.L. Cummings, J. Horlick

8. Performing Organ. Report No. NBSIR 80-1828

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, DC 20234

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 Institue/

Fourdrinier Kraft Board Group

13. Type of Report & Period Covered Final — ?>:

15. SUPPLEMENTARY NOTES

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

IS. ABSTRACT (A 200^word or leas factual summary of moat significant information. If document includes a si gni ficant 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 [ 1 Unlimited

[%~1 For Official Distribution. Do Not Release to NTIS n 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

(THIS REPORT)

UNCLASSIFIED

20. SECURITY CLASS

(THIS PAGE)

UNCLASSIFIED

21. NO. OF

PRINTED PAGES

15

22. Price

USCOMM-DC
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