1、Designation: D2346 00 (Reapproved 2012)D2346 13Standard Test Method forApparent Density of Leather1This standard is issued under the fixed designation D2346; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision
2、. 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 Department of Defense.1. Scope1.1 This test method covers the determination of the a
3、pparent density of specimens of leather. This test method does not applyto wet blue.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard
4、.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Do
5、cuments2.1 ASTM Standards:2D1610 Practice for Conditioning Leather and Leather Products for TestingD1813 Test Method for Measuring Thickness of Leather Test SpecimensD2347 Test Method for Measuring Area of Leather Test Specimens3. Terminology3.1 Definitions:3.1.1 apparent densitythe weight of a unit
6、 volume of bulk leather conditioned for 48 haccording to Practice D1610in anatmosphere maintained at 73.4 6 1.8F (23 6 1C) and 50 6 4 % relative humidity. .4. Significance and Use4.1 This test method is designed to determine the apparent density of specimens from their area and thickness. By measuri
7、ngapparent density, the degree of loading or of compression of leather can be evaluated. The test method is unsuitable for very softleathers such as chamois whose thickness cannot be accurately measured by the test method cited.5. Apparatus5.1 Round Die, 2.7 to 3.0 in. (68.6 to 76.2 mm) in diameter.
8、5.2 Mallet or Clicking Machine.5.3 Rule or Steel Tape, graduated in 132 in. or 0.02 in. or in millimetres.5.4 Balance and set of weights.5.5 Thickness Gage as described in Test Method D1813.6. Test Specimen6.1 The test specimen shall be a disk of leather that has been conditioned as specified in 3.1
9、.1. This specimen may be the sameas that used in Test Method D2347.1 This test method is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.03 on Footwear. This test methodwas developed in cooperation with the American Leather Chemists Assn.
10、(Standard Method E62 1972).Current edition approved Sept. 1, 2012May 1, 2013. Published September 2012May 2013. Originally approved in 1965 as D2346 65 T. Last previous edition approvedin 20082012 as D2346 00(2008).(2012). DOI: 10.1520/D2346-00R12.10.1520/D2346-13.2 For referencedASTM standards, vis
11、it theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standa
12、rd an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM
13、is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17. Procedure7.1 Weigh the specimen to the nearest 0.001 g.7.2 Measure the thickness to the nearest 0.025-cm in four quadrants of the specimen di
14、sk, equidistant from the rim and center(10 mil = 0.025 cm).7.3 Measure the area to the nearest second decimal place in accordance with Test Method D2347.8. Calculation and Report8.1 Calculate the apparent density to the second decimal place by dividing the weight of the specimen in grams by the prod
15、uctof area in square centimetres and the average thickness in centimetres.9. Precision and Bias9.1 Results by the same operator on duplicate, adjacent specimens from the same skin should not be considered suspect unlessthe coefficient of variation exceeds 4 %.9.2 Results of two laboratories on dupli
16、cate specimens, same skin, should not be considered suspect unless the coefficient ofvariation exceeds 10 %.10. Keywords10.1 apparent density; area; leather; thicknessASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin th
17、is standard. Users of this standard are expressly advised that determination of 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 b
18、e reviewed every five years andif not revised, either reapproved or withdrawn.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 theresp
19、onsible technical committee, which you may attend. If you feel that your comments 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, We
20、st Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple 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 ASTM website (www.astm.org/COPYRIGHT/).D2346 132
