1、Designation: D2118 18Standard 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
2、 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 practice recommends that a single value be adoptedfor the commercial moisture content of wool in any of thefo
3、llowing forms: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
4、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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4
5、 This international standard 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 Tr
6、ade (TBT) Committee.2. Referenced 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 Commercia
7、l Weight andYield of Scoured 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 de
8、finition of wool and other textile 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 recom
9、mended single value fora standardized 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 vario
10、us commercial moisture allow-ance values 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-f
11、ree fiber content when the form of the wool 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.NOTE 1For other com
12、mercial regain values commonly used for woolin various 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 ofA
13、STM Committee D13 on Textiles andis the direct responsibility 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 J
14、uly 2018. DOI: 10.1520/D2118-18.2For 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,
15、 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United 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 an
16、d Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.2.1 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
17、.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 determination of
18、 the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.
19、Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comme
20、nts have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or m
21、ultiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ Wool Handbook, Second edition, Table 17, p. 157.4Tariff Schedules of the United States of America, Schedule 3, Part 1, SubpartC, Headnote 1(c).D2118 182
