ASTM_D_2252_-_05_2009.pdf

Designation:D225205(Reapproved 2009)Standard 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 indicates 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 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.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.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD2130 Test Method for Diameter of Wool and OtherAnimalFibers 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.Significance 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 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,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 fiber 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 level 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 July 1,2009.Published August 2009.Originallyapproved in 1964.Last previous edition approved in 2005 as D2252 05.DOI:10.1520/D2252-05R09.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 APPENDIXES(Nonmandatory Information)X1.DESCRIPTION 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 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),ClothingX2.FINENESS VARIABILITY OF CERTAIN ALPACA TYPESX2.1 Typical standard deviations of the fiber diameters ofvarious types of alpaca are listed in Table X2.1 for informationonly.These are not part of the specifications.TABLE 1 Fineness Specifications for Types of AlpacaTypeAverage Diameter,mT Extraunder 22.00T22.00 to 24.99X22.00 to 24.99AA25.00 to 29.99A30.00 to 35.99SKover 30.00LPover 30.00D2252 05(2009)2 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