1、Designation:D665916(Reapproved 2021)Standard Practice forSampling and Preparation of Wet Blue and Wet White forPhysical and Chemical Tests1This standard is issued under the fixed designation D6659;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、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 practice covers the sampling and preparation ofWet Blue and Wet White for physical and chemica
3、l tests.Theproduct is grouped into lots that are randomly sampled in sucha manner as to produce a representative sample of the lot.Thissample may be used to determine compliance of the lot withapplicable specification requirements,and on the basis ofresults,the lot may be accepted or rejected in its
4、 entirety.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 a
5、ny,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 internationall
6、y 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:2D6658 Test Method
7、for Volatile Matter(Moisture)of WetBlue by Oven Drying3.Terminology3.1 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 and Wet White in formed lotsshould be
8、produced from:(1)Units of product of similar sizeand type.(2)A single product method.(3)Sequential produc-tion batches.3.1.1.2 DiscussionIn addition to 3.1.1.1,Wet Blue informed lots should be produced from Chromium tanningmaterial obtained from the same producer(or functionallyequivalent).3.1.2 uni
9、t,na piece of Wet Blue or Wet White in the formin which it is purchased,such as a single hide,skin,or any partthereof.4.Significance and Use4.1 The sampling procedures described in this practice havebeen designed to ensure random sampling of Wet Blue and WetWhite for physical and chemical tests.Wet
10、Blue and Wet Whiteare natural products and as such are subject to extensivevariability.The physical and chemical properties vary consid-erably depending on location on the hide,side,or skin fromwhich the test sample is taken.Random sampling of specimensfrom a predefined location and orientation mini
11、mizes test biasand variability.This practice defines these parameters.5.Conditioning5.1 Unless otherwise specified in the applicable test method,specification,or procurement document,samples shall betempered to the ambient laboratory conditions prior to prepa-ration of testing.6.Sampling Procedure6.
12、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,etc.Take without regard to quality.6.2.1 The number of samples taken depends on the reliabil-ity o
13、f 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 recorded on the test report.It is recom-mended that 12 samples be taken for every 50,000 square feeto
14、f hide or skin.These 12 shall be considered a lot,or batch.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 Sept.1,2021.Published October 2021.Originallyapproved in 2001.Last previous
15、edition approved in 2016 as D6659 16.DOI:10.1520/D6659-16R21.2For 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.Copyr
16、ight 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.1NOTE1By reason of the high moisture content of Wet Blue and WetWhite,samples shoul
