ASTM_D_6466_-_10.pdf

Designation:D646610Standard Test Method forDiameter of Wool and Other Animal Fibers By Sirolan-Laserscan Fiber Diameter Analyser1This standard is issued under the fixed designation D6466;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 test method covers a procedure,using the Sirolan-Laserscan,for the determination of the average fiber diameterand the fiber diameter variation in wool and other animal fibersin their various forms.1.2 The values stated in SI units are to be regarded as thestandard.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 TextilesD584 Test Method for Wool Content of Raw WoolLaboratory ScaleD1060 Practice for Core Sampling of Raw Wool in Packagesfor Determination of Percentage of Clean Wool FiberPresent2D1776 Practice for Conditioning and Testing TextilesD2130 Test Method for Diameter of Wool and OtherAnimalFibers by MicroprojectionD2252 Specification for Fineness of Types of AlpacaD2816 Test Method for Cashmere Coarse-Hair Content inCashmereD3991 Specifications for Fineness of Wool or Mohair andAssignment of GradeD3992 Specifications for Fineness of Wool Top or MohairTop and Assignment of GradeE126 Test Method for Inspection,Calibration,and Verifica-tion of ASTM HydrometersE1750 Guide for Use of Water Triple Point Cells2.2 Federal Standards:Official Standards of the United States for Grades ofWool,Section 31.03Measurement Method for Determining Grade of Wool,Sec-tion 31.2043Official Standards of the United States for Grades of WoolTop,Section 31.14Measurement Method for Determining Grade of WoolTop,Section 31.3014IWTO-8 Method of Determining Wool Fiber Diameter bythe Projection Microscope5IWTO-12 Measurement of the Mean and Distribution ofFibre Diameter Using the Sirolan-Laserscan Fibre Diam-eter Analyser53.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 standard:average fiber diameter,grade,and snippet.3.2 For definitions of other textile terms used in this testmethod,refer to Terminology D123.4.Summary of Test Method4.1 This test method describes procedures for samplingvarious forms of wool,the reduction of the sample to small testspecimens,and measurement of the diameter of a number offibers from the test specimens using the Laserscan.Snippetscut from the various forms of wool are cleaned where required,and dispersed in a mixture of isopropanol and water.Thesuspension of snippets is transported through a measuring cellwhich is positioned in a beam of laser light.The reduction inintensity of the laser beam as the individual snippets passthrough the beam of light,approximately 500 m in diameter,is sensed by a detector and transformed,using a calibrationlook-up table,into a diameter in micrometres.Each diameter1This test method is under the jurisdiction ofASTM Committee D13 on Textilesand is the direct responsibility of Subcommittee D13.13 on Wool and Felt.Current edition approved June 1,2010.Published July 2010.Originally approvedin 1999.Last previous edition approved in 2005 as D6466 99(2005).DOI:10.1520/D6466-10.2For 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.3Federal Register,Vol 30,No.161,Aug.20,1965,pp.1082910833.4Federal Register,Vol 33,No.248,Dec.21,1968,pp.1907319076.5International Wool Textile Organization,International Wool Secretariat,Com-mercial Development Department,Valley Drive,Ilkley,LS298PB,England.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 measurement is allocated to a diameter class,and when thespecified number of fibers has been measured,the classcontents are statistically analyzed to produce the mean andstandard deviation of fiber diameter for the specimen.Fulldistribution data are also available in the form of a printedhistogram.5.Significance and Use5.1 This test method is considered satisfactory for accep-tance testing of commercial shipments of wool and otheranimal fibers in raw and sliver form because current estimatesof between-laboratory precision are acceptable.In cases ofdisagreement arising from differences in values reported by thepurchaser and the supplier when using this test method foracceptance testing,Test Method D2130 shall be used as areferee method