ASTM_D_6182_-_00_2015.pdf

Designation:D618200(Reapproved 2015)Standard Test Method forFlexibility and Adhesion of Finish on Leather1This standard is issued under the fixed designation D6182;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.1.Scope1.1 This test method is intended for use on finished leatherto evaluate resistance to cracking,delamination,and discolor-ation of the finish when subjected to repeated flexing.This testmethod does not apply to wet blue.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1517 Terminology Relating to LeatherD1610 Practice for Conditioning Leather and Leather Prod-ucts for TestingD2813 Practice for Sampling Leather for Physical andChemical Tests2.2 DIN Standard:3DIN 53351 Dauerfaltverhalten3.Terminology3.1 DefinitionsTerms used in this test method are definedin accordance with Terminology D1517.4.Summary of Test Method4.1 Leather is conditioned according to one of two pre-scribed procedures,flexed in a Bally Flexometer,4and anendpoint is determined by rating the degree of damage after afixed number of flexes.5.Significance and Use5.1 This test method is intended for use on any type offinished leather.5.2 This test method will give an indication of the flexibility,adhesion,and strength of the finish on leather.6.Apparatus6.1 Bally Flexometer,conforming to DIN 53351,and oper-ating at a rate of 100 cycles/min.6.2 Die for cutting leather specimens to 45 70 mm.7.Reagents and Materials7.1 Distilled or Deionized Water.8.Sampling,Test Specimens,and Test Units8.1 Sample leather according to Practice D2813.8.2 Cut two test pieces 45 70 mm from each sample usinga die.One piece cut parallel and the other perpendicular to thebackbone.9.Conditioning9.1 Dry Leather TestPrepare the test pieces according toPractice D1610.9.2 Wet Leather TestSubmerge the test pieces in distilledor deionized water for 20 6 1 min.Blot excess water off usingblotting paper or a paper towel.9.3 Other TestConditioning,other than as prescribed,shall be documented in the results.1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.07 on Physical Properties.Current edition approved May 1,2015.Published July 2015.Originally approvedin 1997.Last previous edition approved in 2010 as D6182 00(2010).DOI:10.1520/D6182-00R15.2For 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.3DIN 53351 Dauerfaltverhalten is published by DIN Deutsches Institut frNotmung and is available from ANSI,11 W.42nd St.,13th Floor,New York,NY10036,and from Global Engineering Documents,15 Inverness Way East,Englewood,CO 80112.4Equipment conforming to DIN 53351 is available from Bally Trading Ltd.Prfgerteverkauf,CH-5012 Schnenwerd,Switzerland.Other manufacturers areGiuliani S.N.C.,Via Cervino,10 Torino,Italy,and Pellizzato Bruno,31033Salvarosa di Castelfranco Venito(Treviso),Borgo Mandolato 13,Italy.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 10.Procedure10.1 Bring the upper clamp of the Bally Flexometer to itsuppermost position.10.2 Fold the test piece in half along its major axis with thefinished side toward the middle.10.3 Insert the folded test piece in the top clamp,and tightenthe clamp.10.4 Fold the test piece around the top clamp and down.10.5 Lightly pinch the leather at the top clamp to removeslack and to position the downward fold vertically in thebottom clamp.Tighten the bottom clamp.A properly mountedtest piece will not have any tension between the top and bottomclamps.10.6 Set the counter to zero and the cutoff to the desirednumber of cycles.10.7 Examine the test piece using a magnifying glass with 66 1 magnification.11.Interpretation of Results11.1 Endpoint Determined after Fixed Number of FlexesRank the damage according to Table 1.12.Report12.1 For an endpoint determined by 11.1,report the condi-tions used in Section 9,the number of cycles,and the rank inTable 1 of each test piece in the sample.13.Precision and Bias13.1 No information is presented about either the precisionor bias of this test method for measuring flexibility andadhesion of finish on leather,since the test result is nonquan-titative.14.Keywords14