1、Designation:D281618Standard Test Method forCashmere Coarse-Hair Content in Cashmere1This standard is issued under the fixed designation D2816;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 paren
2、theses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a sequential procedure fordetermining whether or not the cashmere coarse-hair content ofa sample exceeds a specified value.NOTE1Fo
3、r the maximum allowable cashmere coarse-hair content incashmere,refer to Specification D2817.NOTE2For the quantitative analysis of cashmere hair and blends ofcashmere hair and other fibers,refer to Test Methods D629.1.2 This test method is applicable only to cashmere hair inthe form of roving,yarn,o
4、r fabric,and to the cashmere haircontent of blends with other fibers,where the expectedcashmere coarse-hair content is not more than five masspercent(see Footnote C of Table 1).For greater expected masspercentages of cashmere coarse-hair,see Test Methods D629.1.3 This standard does not purport to ad
5、dress 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 develope
6、d 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.
7、1 ASTM Standards:2D123 Terminology Relating to TextilesD629 Test Methods for Quantitative Analysis of TextilesD2130 Test Method for Diameter of Wool and OtherAnimalFibers by MicroprojectionD2817 Specification for Maximum Cashmere Coarse-HairContent in Cashmere(Withdrawn 2018)3D4845 Terminology Relat
8、ing to Wool3.Terminology3.1 For all terminology relating to D13.13,Wool and WoolFelt,refer to Terminology D4845.3.1.1 The following terms are relevant to this test method:cashmere,cashmere coarse hair,cashmere coarse hair content,cashmere down,cashmere hair.3.2 For all other terminology related to t
9、extiles,see Termi-nology D123.4.Summary of Test Method4.1 One thousand(or more)individual fibers of cashmerehair are examined microscopically and classified either ascashmere down or cashmere coarse-hair on the basis of fiberwidth.4.2 The procedure(7.1 and 7.2)for classifying a fiber ascashmere coar
10、se-hair or cashmere requires microscopic exami-nation of fiber segments of fixed length.The number of fibersegments of each width category is proportional to the totallength of the fibers in each category.Hence,the percentage bylength of cashmere coarse-hair in cashmere hair is equal to thepercentag
11、e by number of cashmere coarse-hair segments asdetermined by this procedure.4.3 The observed number of cashmere coarse-hair fibers iscompared with the numbers in Table 1 and a decision is made(1)to accept the lot as conforming,(2)to reject the lot asnonconforming,or(3)to continue testing.The countin
12、g,classification,and comparison process is continued until adecision can be made as to whether the lot does or does notconform to the specification.Table 1 is based on stated levelsof confidence.5.Significance and Use5.1 This test method may be used for determining compli-ance with a specification f
13、or maximum cashmere coarse-haircontent and is required to be used for determining compliancewith Specification D2817.1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsiblity of Subcommittee D13.13 on Wool and Felt.Current edition approved July 1,201
14、8.Published August 2018.Originallyapproved in 1969.Last previous edition approved in 2009 as D2816 05(2009)which was withdrawn January 2018 and reinstated in July 2018.DOI:10.1520/D2816-18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceas
15、tm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-295
16、9.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.1 5.1.1 In case of a dispute arising from differences inreported test results when using Test Method D2816 foracceptance testing of commercial shipments,the purchaser andt
