1、Designation:D211818Standard Practice forAssigning a Standard Commercial Moisture Content forWool and its Products1This standard is issued under the fixed designation D2118;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of l
2、ast 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 practice recommends that a single value be adoptedfor the commercial moisture content of wool in any of thefollowing fo
3、rms:1.1.1 Scoured,1.1.2 Carbonized and neutralized,1.1.3 Noils,uncarbonized,1.1.4 Top,oil or dry combed,1.1.5 Yarn,worsted,1.1.6 Yarn,woolen,1.1.7 Yarn,hand knitting,or1.1.8 Fabric.1.2 LimitationsGrease wool,pulled wool,and wool withpH below 5.0 are excluded from this practice.1.3 This standard does
4、 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international sta
5、ndard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Refe
6、renced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD584 Test Method for Wool Content of Raw WoolLaboratory ScaleD1909 Standard Tables of Commercial Moisture Regainsand Commercial Allowances for Textile FibersD2720 Practice for Calculation of Commercial Weight andYield of Scoure
7、d Wool,Top,and Noil for Various Com-mercial CompositionsD4845 Terminology Relating to Wool3.Terminology3.1 For definitions of textile terms used in this practice:carbonized and neutralized wool,commercial moisturecontent,wool,refer to Terminology D4845.3.2 For the definition of wool and other textil
8、e terms used inthis practice,refer to Terminology D123.4.Significance and Use4.1 The purpose of this practice is to bring about uniformityof commercial moisture standards in all ASTM specificationsrelating to wool and its products.4.2 This practice provides a recommended single value fora standardiz
9、ed commercial moisture content for wool and itsproducts.This avoids difficulties encountered in calculating theamount of moisture-free fiber present in a given mass of woolin any one of the forms listed in 1.1.1 to 1.1.8 due to tradepractices which recognize various commercial moisture allow-ance va
10、lues used by certain segments of the trade.(See TestMethod D584,Section 3.5,Table D1909,D1909 Note E,andthe Tables in Practice D2720).4.3 The recommended commercial moisture content shouldbe used where it is desirable to avoid problems in determiningmoisture-free fiber content when the form of the w
11、ool ischanged.For example:from scoured wool(12.0%moisturecontent)to worsted yarn,dry spun(13.04%moisture content).5.Recommended Commercial Moisture Content5.1 Use 12.0%as the commercial moisture content forwool and its products.NOTE1For other commercial regain values commonly used for woolin various
12、 forms,refer to Table 1 in Table D1909,Table 1 in PracticeD2720,and Note 1 in Test Method D584.5.2 The value of 12.0%has been assigned as the commer-cial moisture content for the following reasons:1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibili
13、ty of Subcommittee D13.13 on Wool and Felt.Current edition approved July 1,2018.Published August 2018.Originallyapproved in 1961.Last previous edition approved in 2009 as D2118 05(2009)which was withdrawn January 2018 and reinstated in July 2018.DOI:10.1520/D2118-18.2For referenced ASTM standards,vi
14、sit 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.Unit
15、ed StatesThis international standard was developed in accordance with 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
16、to Trade(TBT)Committee.1 5.2.1 A moisture content of 12.0%is approximately equalto 13.6%moisture regain which has been listed as theAmerican Moisture Regain specification for scoured wool.35.2.2 A moisture content of 12.0%is the basis for theassessment of duty on the importation of raw wool into theU.S.4ASTM 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
