1、Designation:D665910(Reapproved 2015)Standard Practice forSampling and Preparation of Wet Blue for Physical andChemical Tests1This standard is issued under the fixed designation D6659;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,th
2、e 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 practice covers the sampling and preparation of wetblue for physical and chemical tests.The product is group
3、edinto lots that are randomly sampled in such a manner as toproduce a representative sample of the lot.This sample may beused to determine compliance of the lot with applicablespecification requirements,and on the basis of results,the lotmay be accepted or rejected in its entirety.1.2 The values sta
4、ted 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.I
5、t 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:2D6658 Test Method for Volatile Matter(Moisture)of WetBlue by Oven Drying3.Termin
6、ology3.1 Definitions:3.1.1 lot(or batch),nunits of products from a single type,grade,class,size,and composition,manufactured under essen-tially the same conditions and time.3.1.1.1 DiscussionWet blue in formed lots should beproduced from:(1)Units of product of similar size and type.(2)Chromium tanni
7、ng material obtained from the same pro-ducer(or functionally equivalent).(3)Asingle product method.(4)Sequential production batches.3.1.2 unit,na piece of wet blue in the form in which it ispurchased,such as a single hide,skin,or any part thereof.4.Significance and Use4.1 The sampling procedures des
8、cribed in this practice havebeen designed to ensure random sampling of wet blue forphysical and chemical tests.Wet blue is a natural product andas such is subject to extensive variability.The physical andchemical properties vary considerably depending on locationon the hide,side,or skin from which t
9、he test sample is taken.Random sampling of specimens from a predefined location andorientation minimizes test bias and variability.This practicedefines these parameters.5.Conditioning5.1 Unless otherwise specified in the applicable test method,specification,or procurement document,samples shall bete
10、mpered to the ambient laboratory conditions prior to prepa-ration of testing.6.Sampling Procedure6.1 Prior to sampling,identify the product properly as a lotor batch.6.2 Select units from locations scattered throughout the lot,not from the same portion of the lot,such as a single pallet,carton,layer
11、,etc.Take without regard to quality.6.2.1 The number of samples taken depends on the reliabil-ity of the test results,the deviation of the properties,and theerror of the testing procedure.The number of samples takenmay be at the discretion of the user and the related test methodand should also be re
12、corded on the test report.It is recom-mended that 12 samples be taken for every 50,000 square feetof hide or skin.These 12 shall be considered a lot,or batch.NOTE1By reason of the high moisture content of wet blue,samplesshould be taken after the wringing operation and immediately sealed inairtight
13、plastic wrap.Store in a cool place until used.6.3 The standard location for sampling wet blue is thekidney area(designated as TEST AREA“a”in Fig.1).Sampling in the belly or shoulder area is only applicable if thatis the end product being sold or purchased:6.3.1 SkinsCut the test piece to the size an
14、d shape requiredfor the tests to be made,with one edge parallel to and 1 in.1This practice is under the jurisdiction ofASTM Committee D31 on Leather andis the direct responsibility of Subcommittee D31.02 on Wet Blue.Current edition approved Dec.1,2015.Published December 2015.Originallyapproved in 20
15、01.Last previous edition approved in 2010 as D6659 10.DOI:10.1520/D6659-10R15.2For 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 A
16、STM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1(25.4 mm)from the backbone line,beginning 3 in.(76 mm)from the root of the tail.Pieces shall be cut from only one sideof the backbone of each skin.The test area for skins corre-sponds to area a for cattlehides of Fig.1.6.3.2 CattlehidesThe location and size of cutting shall beas follows:6.3.2.1 Hides,Sides,Crops,Backs,and BendsCut the testpiece to the size and shape required f
