1、Designation:D 2895 88(Reapproved 1999)An American National StandardStandard Test Method forGloss Retention of Waxed Paper and Paperboard AfterStorage at 40C(104F)1This standard is issued under the fixed designation D 2895;the number immediately following the designation indicates the year oforiginal
2、 adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is intended primarily to measure thegloss retention of w
3、axed specimens exhibiting relatively goodgloss.1.2 The values stated in acceptable metric units are to beregarded as the standard.The values in parentheses are forinformation only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsi
4、bility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 1834 Test Method for 20 Specular Gloss of WaxedPaper23.Terminology3.1 Definitions:3.1.1 gloss r
5、etentionthe percent of the original glossretained by the specimen after aging under specified condi-tions.It is the final gloss divided by the initial gloss,multipliedby 100.4.Summary of Test Method4.1 The initial gloss of waxed paper or paperboard ismeasured in accordance with Test Method D 1834,th
6、enremeasured after aging the sample for 1 and 7 days in an ovenat 40C(104F).The 1-day test is to observe trends.The 7-daytest is the standard test.5.Significance and Use5.1 The specified aging conditions are intended to correlatewith the conditions likely to occur in the handling and storageof waxed
7、 paper and paperboard.6.Apparatus6.1 Forced-Draft Oven,capable of maintaining a tempera-ture of 40 6 0.6C(104 6 1F).6.2 Rack,with clips or pegs for holding specimens,so thatfree circulation of air will be obtained around the specimens,and so that the surfaces to be tested will be prevented fromtouch
8、ing each other or parts of the oven.6.3 Glossmeter meeting the requirements of Test MethodD 1834.7.Test Specimens7.1 The test specimens shall consist of five pieces cut fromdifferent portions of the test sample.The test pieces shall betouched only on the edges.They must not come in contact withabras
9、ives,oils,or dusty materials,and must not be exposed tosunlight or heat,except for the temperature condition specifiedin the oven.8.Procedure8.1 Obtain the initial gloss of the specimens in accordancewith Test Method D 1834.8.2 Place the specimens in the oven with pegs or clips toseparate them.8.3 A
10、fter 1 day remove the specimens,allow them to cool,remeasure gloss in accordance 8.1,and return the samples tothe oven.After a total of 7 days,remove the specimens for finalmeasurement.9.Calculation9.1 Calculate percent gloss retention as follows:Gloss retention,%5final gloss/initial gloss!3 100(1)1
11、0.Report10.1 Report initial gloss,final gloss,and percent glossretention.11.Precision and Bias11.1 The precision of this test method as determined bystatistical examination of interlaboratory results is as follows:11.1.1 RepeatabilityThe difference between two test re-sults,obtained by the same oper
12、ator with the same apparatusunder constant operating conditions on identical test material,1This test method is under the jurisdiction of ASTM Committee D-2 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.10.OA on Physical and Chemical Properties.Current editi
13、on approved Oct.31,1988.Published December 1988.Originallypublished as D 2895 70 T.Last previous edition D 2895 73(1983)e1.2Annual Book of ASTM Standards,Vol 05.01.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.would in the long run,in t
14、he normal and correct operation ofthe test method,exceed the following values only in one casein twenty:5%11.1.2 ReproducibilityThe difference between two singleand independent results obtained by different operators work-ing in different laboratories on identical test material would,inthe long run,
15、in the normal and correct operation of the testmethod,exceed the following values only in one case intwenty:7.7%11.2 Precision was determined in round-robin testing amongseven laboratories on two samples having an initial glossbetween 72 and 90 and a gloss retention greater than 95%.These precision
16、values may not apply to materials with lowergloss and gloss retention.11.3 The procedure in this test method has no bias becausethe value of gloss retention can be defined only in terms of atest method.12.Keywords12.1 gloss retention;paperboard;waxed paperThe American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard.Users of this standard are expressly advised that determination of the
