1、Designation: D 2346 00 (Reapproved 2004)Standard Test Method forApparent Density of Leather1This standard is issued under the fixed designation D 2346; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A nu
2、mber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 appar-
3、ent density of specimens of leather. This test method does notapply to wet blue.1.2 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 det
4、ermine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 1813 Test Method for Measuring Thickness of LeatherTest SpecimensD 2347 Test Method for Measuring Area of Leather TestSpecimens3. Terminology3.1 Definition:3.1.1 apparent densitythe weight o
5、f a unit volume of bulkleather conditioned for 48 h in an atmosphere maintained at73.4 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 apparentdensity of specimens from their area and thickness. Bymeasuring apparent density, th
6、e degree of loading or ofcompression of leather can be evaluated. The test method isunsuitable for very soft leathers such as chamois whosethickness cannot be accurately measured by the test methodcited.5. Apparatus5.1 Round Die, 2.7 to 3.0 in. (68.6 to 76.2 mm) in diameter.5.2 Mallet or Clicking Ma
7、chine.5.3 Rule or Steel Tape, graduated in132 in. or 0.02 in. or inmillimetres.5.4 Balance and set of weights.5.5 Thickness Gage as described in Test Method D 1813.6. Test Specimen6.1 The test specimen shall be a disk of leather that has beenconditioned as specified in 3.1.1. This specimen may be th
8、esame as that used in Test Method D 2347.7. Procedure7.1 Weigh the specimen to the nearest 0.001 g.7.2 Measure the thickness to the nearest 0.025-cm in fourquadrants of the specimen disk, equidistant from the rim andcenter (10 mil = 0.025 cm).7.3 Measure the area to the nearest second decimal place
9、inaccordance with Test Method D 2347.8. Calculation and Report8.1 Calculate the apparent density to the second decimalplace by dividing the weight of the specimen in grams by theproduct of area in square centimetres and the average thicknessin centimetres.9. Precision and Bias9.1 Results by the same
10、 operator on duplicate, adjacentspecimens from the same skin should not be considered suspectunless the coefficient of variation exceeds 4 %.9.2 Results of two laboratories on duplicate specimens,same skin, should not be considered suspect unless the coef-ficient of variation exceeds 10 %.10. Keywor
11、ds10.1 apparent density; area; leather; thickness1This test method is under the jurisdiction of ASTM Committee D31 on Leatherand is the direct responsibility of Subcommittee D31.03 on FootwearThis testmethod was developed in cooperation with the American Leather Chemists Assn.(Standard Method E 62 1
12、972).Current edition approved Sept. 1, 2004. Published September 2004. Originallyapproved in 1965 as D 2346 65 T. Last previous edition approved in 2000 asD 2346 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Bo
13、ok of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any patent rights
14、 asserted in connection with any item mentionedin this 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 ti
15、me by the responsible technical committee and must be 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
16、receive careful consideration at a meeting of theresponsible 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
17、International, 100 Barr Harbor Drive, PO Box C700, West 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).D 2346 00 (2004)2
