ASTM_D_6116_-_00_2010.pdf

Designation:D611600(Reapproved 2010)Standard Test Method forBlocking1This standard is issued under the fixed designation D6116;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 Department of Defense.1.Scope1.1 This test method covers the determination of the resis-tance of leather to blocking under specific conditions oftemperature,humidity,and pressure.This test method does notapply 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.Apparatus2.1 Forced Circulating Hot Air Oven,capable of maintain-ing 80 6 3C.2.2 American Medical Museum Jar(with Lid),having innerdimensions of 16 cm high,10 cm long,and 8 cm wide.Thereshall be three indentations at the top of each 8 cm side.2.3 Petri Dish,100 by 15 mm,with cover.2.4 Weight,2000 g.3.Test Specimen3.1 Test one rectangular 2.5 by 10 cm specimen per sample.4.Procedure4.1 The specimen shall be perforated 2 mm from one endand hung on a standard size paper clip that has been opened toits full length.No more than five specimens shall be hung onone clip.The clip holding the specimen shall be set into theindentations of the jar.No more than three clips shall be placedin a jar.The jar shall be filled with tap water at 23 6 2C to alevel no higher than 1.25 cm from the bottom of the hangingspecimen.The lid shall then be placed on the jar and thespecimen allowed to condition for 4 h.4.2 After conditioning,the specimen shall be removed fromthe jar and immediately folded grain to grain to form a 2.5 by5 cm rectangle.The folded specimen shall then be placed in aninverted(rim up)petri dish cover.The bottom plate of the dishshall then be placed concentrically within the inverted coverplate so as to cover the specimen evenly.4.3 A2000 g weight shall be placed on top of the invertedbottom plate.The whole assembly shall then be placed in anoven at 80 6 3C for 2 h and then removed.The weight andcover plate shall be removed from the assembly and thespecimen allowed to cool for 30 min.4.4 The cooled and folded specimen shall be examined byslowly pulling the fold apart by hand.The specimen shall beexamined for ease of separation,grain damage,and finishpeeling.5.Report5.1 Report resistance of specimen to blocking by the fol-lowing scale:1Pass.No blocking.2Fail.Finish peeling.6.Precision and Bias6.1 This test method is adopted from the procedures of thefederal government where it has been in use and where it wasapproved for publication before the inclusion of precision andbias statements was mandated.The original interlaboratory testdata is no longer available.The user is cautioned to verify byuse of reference materials,if available,that the precision andbias of this test method is adequate for contemplated use.7.Keywords7.1 blocking;leather1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.05 on Upholstery.Current edition approved April 1,2010.Published May 2010.Originallyapproved in 1997.Last previous edition approved in 2005 as D6116 00(2005).DOI:10.1520/D6116-00R10.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-95