ASTM_D_1441_-_12.pdf

Designation:D144112Standard Practice forSampling Cotton Fibers for Testing1This standard is issued under the fixed designation D1441;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 covers procedures for taking a lot sampleof cotton fibers,from a designated source(lot),and reducingthe lot sample through a series of steps to produce testspecimens that are representative of the source and suitable forthe determination of fiber properties according to establishedprocedures.1.2 This practice has been used extensively for commercialacceptance testing of cotton fibers as well as for arbitrationtesting and research.NOTE1This practice is used in taking samples of cotton for testing byTest Methods D1440,D1442,D1445,D1447,D1448,D1464,D2480,D2812,D5866 and D5867.1.3 The procedures do not cover the selection of samples forthe determination of moisture.Special handling and protectionof the sample from the prevailing atmosphere required forsamples taken for the determination of moisture are notprovided for in this practice.See Test Method D2495.1.4 The values stated in SI units are to be regarded asstandard.No other units of measure are included in thisstandard.1.5 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 TextilesD1440 Test Method for Length and Length Distribution ofCotton Fibers(Array Method)D1442 Test Method for Maturity of Cotton Fibers(SodiumHydroxide Swelling and Polarized Light Procedures)D1445 Test Method for Breaking Strength and Elongation ofCotton Fibers(Flat Bundle Method)D1447 Test Method for Length and Length Uniformity ofCotton Fibers by Photoelectric MeasurementD1448 Test Method for Micronaire Reading of Cotton Fi-bersD1464 Practice for Differential Dyeing Behavior of CottonD1776 Practice for Conditioning and Testing TextilesD2480 Test Method for Maturity Index and Linear Densityof Cotton Fibers by the Causticaire Method(Withdrawn1992)3D2495 Test Method for Moisture in Cotton by Oven-DryingD2812 Test Method for Non-Lint Content of CottonD5866 Test Method for Neps in Cotton Fibers(AFIS-NInstrument)D5867 Test Methods for Measurement of Physical Proper-ties of Raw Cotton by Cotton Classification InstrumentsD7139 Terminology for Cotton Fibers3.Terminology3.1 For all terminology relating to D13.11,Cotton Fibers,refer to Terminology D7139.3.1.1 The following terms are relevant to this standard:laboratory sample,lot,in acceptance sampling of cotton,lotsample,in cotton,and specimen.3.2 For all other terminology related to textiles,refer toTerminology D123.4.Summary of Practice4.1 Sampling procedures for obtaining samples from the lotand for the reduction of the lot samples to the size required forfiber test specimens are presented.Steps are outlined to securereduction of the amount of cotton fibers to be handled atvarious stages,so that the reduced sample continues to berepresentative of the lot.Provision is made for the omission ofintermediate steps in the reduction of the lot sample in caseswhere this is desirable or necessary(see 13.1).5.Significance and Use5.1 The reliability of the results of any test method dependsprimarily upon how well the specimens tested represent the1This practice is under the jurisdiction ofASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.11 on Cotton Fibers.Current edition approved July 1,2012.Published August 2012.Originallyapproved in 1952.Last previous edition approved in 2006 as D1441 06.DOI:10.1520/D1441-12.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 original source material or lot.Failure to provide a testspecimen which accurately represents the lot from which it isdrawn will produce misleading test results regardless of theaccuracy and precision of the test method.6.Apparatus6.1 Mechanical Fiber Blender,4designed especially for cot-ton fibers(optional).6.2 Balance,100 g capacity,0.5 g sensitivity(optional).7.Conditioning7.1 For laboratory samples that are not to be blended,neither preconditioning or conditioning is required.7.2 For laboratory samples that are to be blended,bring thelot sample from the