1、Designation:D586712(Reapproved 2020)Standard Test Methods forMeasurement of Physical Properties of Raw Cotton byCotton Classification Instruments1This standard is issued under the fixed designation D5867;the number immediately following the designation indicates the year oforiginal adoption or,in th
2、e 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 test method covers the measurement of color,trashcontent,micronaire,upper half mean len
3、gth(length),unifor-mity index and breaking tenacity(strength)of raw cotton forcotton marketing using a cotton classification instrument.1.2 This test method is applicable to Upland and Extra LongStaple(ELS)raw cotton.1.3 This test method is applicable to roller and saw ginnedraw cottons.1.4 This tes
4、t method contains the following sections.SectionColor8 11Trash Content12 15Micronaire Reading16 19Upper Half Mean Length(Length)and Uniformity Index20 23Breaking Tenacity(Strength)24 271.5 The values stated in both inch-pound and SI units are tobe regarded separately as the standard.The values given
5、 inparentheses are for information only.1.6 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
6、regulatory limitations prior to use.1.7 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 Trad
7、e Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD2495 Test Method for Moisture in Cotton by Oven-DryingD4848 Terminology Related to Force,Deformation andRelated Properties of TextilesD7139 Terminology for Cotton F
8、ibersE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods3.Terminology3.1 For all terminology related to D13.11,refer to D7139.3.1.1 The following terms are relevant to this standard:
9、micronaire reading,particle count(trash),percent area(trash),Rd(color reflectance)and+b(color yellowness),breakingtenacity(strength),uniformity index,upper-half-mean length.3.2 For all other terminology related to textiles,refer toTerminology D123 and Terminology D4848.4.Significance and UseGeneral4
10、.1 This test method is accepted for testing of bales of rawcotton in commercial shipments.4.2 This test method describes acceptable practices fortesting of raw cotton using cotton classification instrumentsthat are capable of testing the fiber properties of micronairereading,length,uniformity index,
11、strength,Rd(color),+b(color),percent area(trash)and particle count(trash).5.Sampling5.1 Bale SampleFor a bale sample,take a 4 oz(100 g)subsample of cotton from each of two opposite sides of the baleand combine the two subsamples into a single bale sampleweighing 8 oz(200 g).6.Conditioning6.1 Conditi
12、on the cotton samples to the temperature andrelative humidity levels of 21 6 1C(70 6 2F)and 65 6 2%until moisture equilibrium is reached.6.2 Accelerated conditioning is an acceptable practice forthis test method.6.3 Moisture content(dry basis)measured by resistancetechnique referenced to oven method
13、 Test Method D2495 shallbe within 6.75 to 8.25%.1These test methods are under the jurisdiction of ASTM Committee D13 onTextiles and are the direct responsibility of Subcommittee D13.11 on Cotton Fibers.Current edition approved July 1,2020.Published July 2020.Originally approvedin 1995.Last previous
14、edition approved in 2012 as D5867 121.DOI:10.1520/D5867-12R20.2For 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.Copy
15、right ASTM International,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
16、Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.NOTE1This range covers the equilibrium moisture content range forall cottons.NOTE2Cotton is normally received in the laboratory in a relative drycondition,making special preconditioning procedures unnecessary.Samples that are obviously damp should be preconditioned before beingbrought into the laboratory for conditioning.7.Calibration7.1 Follow instrument manufacturers procedures
