ASTM_D_1516_-_05_2021.pdf

Designation:D151605(Reapproved 2021)Standard Test Method forWidth of Leather1This standard is issued under the fixed designation D1516;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers determination of the width ofphysical test specimens and of regularly shaped units andpieces of all types of leather.This test method does not applyto wet blue.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1610 Practice for Conditioning Leather and Leather Prod-ucts for Testing3.Significance and Use3.1 This test method is designed to measure the width ofspecimens before and after they are subjected to various testswhich may change the width.A test procedure wherein suchmeasurements could be used is the change in area of squarepieces when measuring the resistance of leather to syntheticperspiration solution.4.Apparatus4.1 Steel Scale,graduated to 0.02 in.(0.5 mm).4.2 Steel Tape,graduated to116in.or in millimetres.5.Specimen5.1 The specimen shall be the prepared test specimen,unit,or piece.It shall be conditioned for 48 h in an atmospheremaintained at 73.4 6 1.8 F(23 6 1 C)and 50 6 4%relativehumidity and tested under these conditions.See PracticeD1610.6.Procedure6.1 Test SpecimensPlace the specimen on a flat surfaceand flatten it out without pulling or stretching.Measure thewidth to the nearest 0.02 in.(0.5 mm)at the locationsdesignated in the test method for making the particular test forwhich the specimen was prepared.7.Calculation and Report7.1 Report the width of the test specimens used as pre-scribed in the test method for making the particular physicaltest for which the specimen was prepared.7.2 Report the average of the width measurements taken onany unit or piece to the same accuracy as observed on theoriginal measurements,as the width of the piece.8.Precision and Bias38.1 The following criteria may be used to judge the accept-ability of results if at least 15 units have been tested.8.2 A coefficient of variation of 1.8%can be expectedbetween laboratories on specimens of headband leather sub-jected to a perspiration test.NOTE1The data used as a basis for this reproducibility statement wasobtained on a round robin with 3 laboratories measuring width on the1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.07 on Physical Properties Thistest method has been developed in cooperation with theAmerican Leather ChemistsAssn.(Standard Method E5-1961).Current edition approved Sept.1,2021.Published October 2021.Originallyapproved in 1957.Last previous edition approved in 2017 as D1516 05(2017).DOI:10.1520/D1516-05R21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Supporting data for the reproducibility statement are filed at ASTM Headquar-ters and may be obtained by requesting Research Report RR:D31-1007.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1same specimens.The specimens were 51 mm by 51 mm before theperspiration testing.8.3 BiasNo justifiable statement on bias can be madesince the true value of width of leather test specimens cannotbe established by an accepted reference method.9.Keywords9.1 area change;leather;widthASTM International takes no position respecting the validity of any patent rights asserted in connection with a