ASTM_D_1334_-_05_2009.pdf

Designation:D133405(Reapproved 2009)Standard Test Method forWool Content of Raw WoolCommercial Scale1This standard is issued under the fixed designation D1334;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 the determination of the woolbase content and the clean wool fiber present in a lot of rawwool by commercial-scale scouring of the lot followed bylaboratory tests on samples of the scoured wool.NOTE1The sampling of lots of raw wool in packages is covered inPractice D1060,and the determination of the wool content of suchsamples is covered in Test Method D584.The determination of vegetablematter and other alkali-insoluble impurities in scoured wool is covered inTest Method D1113.For factors for the conversion of wool base contentto its equivalent in terms of scoured wool,top,or noil of variouscommercially specified compositions,refer to Practice D2720.NOTE2The values stated in U.S.Customary Units are to be regardedas the standard because of common commercial practice.The S.I.units inparentheses are provided for information only.NOTE3Because of trade practice the term“weight”is used in this testmethod instead of the technically correct term“mass”.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 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 FiberPresentD1113 Test Method for Vegetable Matter and Other Alkali-Insoluble Impurities in Scoured WoolD2720 Practice for Calculation of Commercial Weight andYield of Scoured Wool,Top,and Noil for Various Com-mercial CompositionsD4845 Terminology Relating to Wool3.Terminology3.1 For all terminology related to wool and wool felt,referto Terminology D4845.3.1.1 The following terms are relevant to this standard:clean wool fiber present,other alkali-insoluble impurities,oven-dried,raw wool,vegetable matter base,vegetable matterpresent,wool base.3.2 For all other terminology related to textiles,refer toTerminology D123.4.Summary of Test Method4.1 The entire lot of raw wool is weighed,prepared,scoured,and dried in the usual commercial equipment,withspecial precautions against loss of wool at any stage of theoperations.The commercially dried scoured wool is weighed,then sampled for laboratory determination of its oven-driedweight(mass)and its content of alcohol-extractable matter,mineral matter,vegetable-matter base,and other alkali-insoluble impurities.The wool base content and the clean woolfiber present are calculated as percentages of the net weight(mass)of the lot of raw wool.5.Significance and Use5.1 This test method is considered satisfactory for use as areferee method for the determination of the wool base contentand the clean wool fiber present in a lot of raw wool.If thereare differences of practical significance between reported testresults for two laboratories(or more),comparative test shouldbe performed to determine if there is a statistical bias betweenthem,using competent statistical assistance.As a minimum,use the samples for such a comparative test that are ashomogenous as possible,drawn from the same lot of materialas the samples that resulted in the disparate results during theinitial testing and randomly assigned in equal numbers to eachlaboratory.The test results from the laboratories involvedshould be compared using a statistical test for unpaired data,1This 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 July 1,2009.Published January 2010.Originallyapproved in 1954.Last previous edition approved in 2005 as D1334 05.DOI:10.1520/D1334-05R09.2For 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 probability level chosen prior to the testing series.If bias isfound,either its cause must be found and corrected,or futureresults for that material be adjuste