1、Designation:D225218Standard Specification forFineness of Types of Alpaca1This standard is issued under the fixed designation D2252;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 indi
2、cates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification is applicable in the classification ofalpaca into types according to fineness.1.2 The values stated in inch-pound units are to be regardedas stand
3、ard.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.It is theresponsibility of the user of this standar
4、d 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 internationally recognized principles on standard-ization established in the Decision on Pri
5、nciples 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:2D123 Terminology Relating to TextilesD2130 Test Method for Diameter of Wool and OtherAnimalFiber
6、s by MicroprojectionD4845 Terminology Relating to Wool3.Terminology3.1 For definitions of textile terms used in this specification:alpaca,average fiber diameter,fineness,refer to TerminologyD4845.3.2 For definitions of other textile terms used in thisspecification,refer to Terminology D123.4.Signifi
7、cance and Use4.1 This specification for fineness is intended as a guide forproduction,preparation,and marketing(Note 1)by comparingthe average fiber diameter of a measured specimen with thefineness specifications for the various types listed in Table 1.The standard deviation which expresses measured
8、 variabilityof a specimen may be compared with the average shown inTable X2.1.NOTE1Test Method D2130 does not include any values for theprecision to be expected in the testing of alpaca fibers.In an interlabora-tory test in which six laboratories each made one test on each of six typesamples,HTB-CB,
9、HAXB-CB,HAAB-CB,HAB-CB,HLPB-CL,andHSKB-CL,the coefficient of variation of the average fiber diametersbetween laboratories,including test variation,was 3.2,4.7,3.8,4.5,2.2,and 0.93%for the respective alpaca types.5.Specification5.1 The fineness of various types of alpaca shall conform tothe average f
10、iber diameter limits listed in Table 1.6.Sampling6.1 Sample the material as directed in Test Method D2130.7.Test Method7.1 Test the material as directed in Test Method D2130.Measure at least the minimum number of fibers specified toattain confidence limits of the mean of 60.5 m at a probabil-ity lev
11、el of at least 95%(see Table A1.4 in Annex A1 to TestMethod D2130).8.Keywords8.1alpaca;animal fibers(except wool);fineness1This specification is under the jurisdiction of ASTM Committee D13 onTextiles and is the direct responsibility of Subcommittee D13.13 on Wool and Felt.Current edition approved J
12、uly 1,2018.Published August 2018.Originallyapproved in 1964.Last previous edition approved in 2009 as D2252 05(2009)which was withdrawn January 2018 and reinstated in July 2018.DOI:10.1520/D2252-182For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at s
13、erviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with
14、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 APPENDIXES(Nonmandatory Information)X1.DESCRI
15、PTION AND FINENESS VARIABILITY OF ALPACA TYPESX1.1 The following are the trade categories for classifica-tion of alpaca for market with explanation of the types andsymbols used in the commercial classification system:X1.1.1 Variety,Species,Breed,or Strain:(Symbol and Description)HHuacayaSSuriX1.1.2
16、Age:(Symbol and Description)TTui,first shear,12 months growthAAdult,12 months growthX1.1.3 Type:(Symbol and Description)TTui,12 months ageTSKTui,SkirtingsX1.1.3.1 TSK type alpaca may be expected to range from24 to 28 m average fiber diameter.XExtra Fine AdultAAMedium AdultACoarseSKSkirtingsLPLocks and PiecesX1.1.4 Colors:(Symbol and Description)BBlanco-WhiteLFLight FawnCCastano-TanPDark and PiebaldX1.1.5 Staple Length:(Symbol and Description)CB3 in.(76 mm)or over,CombingCLUnder 3 in.(76 mm),Clot
