ASTM_D_3823_-_07_2012.pdf

Designation:D382307(Reapproved 2012)Standard Practice forDetermining Ticket Numbers for Sewing Threads1This standard is issued under the fixed designation D3823;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 practice establishes standard ticket numbers forsewing thread regardless of fiber content or type of thread.1.2 The values stated in inch-pound units are to be regardedas the standard;the values in English units are provided asinformation only and are not exact equivalents.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 TextilesD204 Test Methods for Sewing ThreadsD1907 Test Method for Linear Density of Yarn(Yarn Num-ber)by the Skein MethodD4849 Terminology Related to Yarns and Fibers2.2 ANSI Standard:3ANSI/ASQC Z1.4 Sampling Procedures for Inspection byAttributes3.Terminology3.1 For all terminology relating to D13.58,Yarns andFibers,refer to Terminology D4849.3.1.1 The following terms are relevant to this standard:geige thread,sewing thread,ticket number.3.2 For all other terms are related to textiles,refer toTerminology D123.4.Significance and Use4.1 This system of sewing thread ticket numbers wasdeveloped to overcome the confusion arising from the use bythe thread industry of a multiple number of undefined andunrelated ticketing systems.4.2 The practice is used by sewing thread manufacturers todetermine the ticket number to be assigned to a sewing thread.The ticket number is an indicator of the amount of raw fiber inthe thread.It is based on greige thread rather than finishedthread because finishing processes such as bleaching,dyeing,stretching,mercerizing,or sewing finish application signifi-cantly change the apparent thread size so that it may become aninadequate indicator of raw fiber present.Because of theforegoing it is not practical to verify the ticket number bysizing the finished thread.5.Sampling5.1 LotUnless otherwise agreed upon between the pur-chaser and supplier,a lot shall be a discrete manufacturing unitproduced in a given period of time not to exceed a calendarmonth.5.2 Lot SampleSelect the number of specimens as directedin ANSI/ASQC Z1.4 using single sampling with a generalinspection level of S1 and a 1.0 AQL.5.3 Laboratory SampleAs a laboratory sample for accep-tance testing,take each unit in the lot sample.5.4 Test SpecimensFrom each package in the laboratorysample,take one specimen.6.Requirements6.1 Sewing thread ticket numbers shall be based on theaverage resultant yarn number and shall be designated asindicated in Table 1.7.Procedure7.1 Determine in tex the resultant yarn number of the greigethread as directed in Test Methods D204.7.2 Over the most recent 6 months of a 1-year period inwhich the greige thread was manufactured,collect at least 100pairs of data,each consisting of a tex value and the productionrate at the time each tex value was obtained.If the greigethread of interest has not been produced in at least 6 of the prior1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.58 on Yarns and Fibers.Current edition approved Feb.1,2012.Published February 2012.Originallyapproved in 1978.Last previous edition approved in 2007 as D3823 07.DOI:10.1520/D3823-07R12.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 12 months,collect at least 100 pairs of data consisting of a texvalue and the corresponding production rate covering theperiod(s)during which the thread was being produced.7.3 Calculate the weighted average of the resultant yarnnumber using Eq 1:w 5(tr/(r(1)where:w=weighted average of resultant yarn number,tex,t=single value of resultant yarn number,tex,andr=production rate associated with a single resultant yarnnumber,kg/unit time(lb/unit time).7.4 Use Table 1 to convert w to the thread ticket number.8.Precision and Bias8.1 The precision and bias of this practice for testingresultant yarn number are as given in Test Method D1907.9.Keywords9.1 sewing thread;ticket number;yarn numberASTM International takes no position respecting the valid