ASTM_D_3774_-_96_2016.pdf

Designation:D377496(Reapproved 2016)Standard Test Method forWidth of Textile Fabric1This standard is issued under the fixed designation D3774;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This test method covers the measurement of the width offabrics,pile or napped surface width,or both.The method isapplicable to full rolls,bolts of fabric,and short specimensremoved from a roll or bolt.Unless otherwise specified,measurements shall include the selvages when present.1.2 The method offers two options:1.2.1 Option AFull Roll or Bolt.1.2.2 Option BShort Specimen Removed from Full Rollor Bolt.1.3 The values stated in either SI units or U.S.customaryunits are to be regarded as standard.The U.S.customary unitsmay be approximate.1.4 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing Textiles2.2 Other Standard:ANSI/ASQC Z1.4Inspection by Attributes33.Terminology3.1 The following terms are relevant to this standard:width,of a fabric;width,of a raised-surface fabric;width,of a fabricwoven on a shuttleless loom.3.2 For definitions of all other textile terms see TerminologyD123.4.Summary of Test Method4.1 The width of the fabric is measured directly by using ametal rule.4.2 Option A offers two procedures for the measurement offabric width,or pile width or napped surface width,or both,infull rolls or bolts.The first procedure is essentially a tension-free method,the second procedure provides for measurementsmade during finishing or inspection operations that may imparttension to the fabric.4.3 Option B covers the measurement of fabric width,pilesurface width or napped surface width,or both,when only ashort length of fabric is available for testing.This procedure isapplicable when a small swatch of fabric is sent to thelaboratory to be used as the test specimen.5.Significance and Use5.1 Option A procedures of Test Method D3774 for widthare considered satisfactory for acceptance testing of commer-cial shipments because they are used extensively in the trade.5.1.1 In case of a dispute arising from differences inreported test values when using Test Method D3774 foracceptance testing of commercial shipments,the purchaser andthe supplier should conduct comparative tests to determine ifthere is a statistical bias between their laboratories.Competentstatistical assistance is recommended for the investigation ofbias.As a minimum,the two parties should 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 thesupplier must agree to interpret future test results in the light ofthe known bias.1This test method are under the jurisdiction of ASTM Committee D13 onTextiles and are the direct responsibility of Subcommittee D13.60 on Fabric TestMethods,Specific.Current edition approved July 1,2016.Published July 2016.Replaces Sections13 to 17 of Methods D1910 89,Test for Construction Characteristics of WovenFabrics.Originally approved in 1996.Last previous edition approved in 2012 asD377496(2012).DOI:10.1520/D3774-96R16.2For 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 6.Apparatus6.1 Measuring device,metre(yard)stick or steel tapehaving 1-mm(116-in.)graduations and a length that is greaterthan the width of fabric to be measured.7.Sampling7.1 As a lot sample for acceptance testing,take at randomthe number of rolls of fabric as directed in an applicablematerial specification or other agreement between the pur-chaser and the supplier.7.2 For Option A,consider rolls of fabric to be the primarysampling units.Consider the rol