1、Designation:D157613Standard Test Method forMoisture in Wool by Oven-Drying1This standard is issued under the fixed designation D1576;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 in
2、dicates 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 amountof moisture present in ordinary commercial and industrialsamples of wool in all forms except grease wool,usi
3、ng theoven-drying technique.1.2 Formulas for calculating the moisture content(as-received basis)and moisture regain(oven-dried basis)aregiven.It is always important to use the correct term whichcorresponds to the basis used in the calculation(see 12.2.1).NOTE1The determination of moisture content fo
4、r textile materials ingeneral is covered in Test Methods D2654,and an optimal method fordetermining the moisture in wool by distillation with toluene is covered inTest Method D2462.Amethod for sampling wool for the determination ofmoisture in wool is covered in Practice D2525.The oven-drying methodh
5、as been adapted for cotton in Test Method D2495.1.3 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 regula
6、tory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1060 Practice for Core Sampling of Raw Wool in Packagesfor Determination of Percentage of Clean Wool FiberPresentD1776 Practice for Conditioning and Testing TextilesD2258 Practice for Sampli
7、ng Yarn for TestingD2462 Test Method for Moisture in Wool by DistillationWith TolueneD2495 Test Method for Moisture in Cotton by Oven-DryingD2525 Practice for Sampling Wool for MoistureD2654 Test Method for Moisture in Textiles(Withdrawn1998)3D3333 Practice for Sampling Manufactured Staple Fibers,Sl
8、iver,or Tow for TestingD4845 Terminology Relating to Wool3.Terminology3.1 For all terminology related to D13.13,Wool and Felt,see Terminology D4845.3.1.1 The following terms are relevant to this standard:grease wool,moisture content,moisture-free,moisture regain,oven-dried,pulled wool,raw wool,recyc
9、led wool,scouredwool,virgin wool,wool,wool,as defined in the Wool ProductsLabeling Act of 1939.3.2 For definitions of all other textile terms see TerminologyD123.4.Summary of Test Method4.1 A specimen of wool material is weighed and then driedto constant mass at 105 6 2C in an oven supplied withambi
10、ent air.The loss in mass is considered moisture andreported as either moisture content or moisture regain.Direc-tions are given for the adjustment of the observed results forany change in the moisture content after sampling and beforedrying.5.Significance and Use5.1 Test Method D2462 for the determi
11、nation of the mois-ture in wool by distillation with toluene is the preferred methodfor testing wool for moisture for the acceptance testing ofcommercial shipments.If,however,the purchaser and thesupplier agree,Test Method D1576 for the determination of themoisture in wool by oven drying may be used
12、 instead.Comparative tests as directed in 5.1.1,may be advisable.5.1.1 In case of a dispute arising from differences inreported test results when using Test Method D1576 foracceptance testing of commercial shipments,the purchaser andthe supplier should conduct comparative tests to determine ifthere
13、is a statistical bias between their laboratories.Competentstatistical assistance is recommended for the investigation of1This 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
14、,2013.Published August 2013.Originallyapproved in 1958.Last previous edition approved in 2008 as D1576 90(2008).DOI:10.1520/D1576-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informati
15、on,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 19428-2959.United States1 bias.As a minimum,the two parties shoul
16、d take a group of testspecimens which are as homogeneous as possible and whichare from a lot of material of the type in question.The testspecimens should then be randomly assigned in equal numbersto each laboratory for testing.The average results from the twolaboratories should be compared using Students t-test forunpaired data and an acceptable probability level chosen by thetwo parties before testing is begun.If a bias is found,either itscause must be found and corrected or the purchaser and t
