1、Designation: D 1813 00 (Reapproved 2005)Standard Test Method forMeasuring Thickness of Leather Test Specimens1This standard is issued under the fixed designation D 1813; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast revision. A number 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 measureme
3、nt of the thick-ness of leather test specimens in which the dimensions of thespecimens are used directly in determining the results of testsfor physical properties. This test method does not apply to wetblue.1.2 This standard does not purport to address all of thesafety concerns, if any, associated
4、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. Significance and Use2.1 This test method shall be used where precise dimensionsare necessary for calcula
5、tion of properties expressed in physi-cal units. It is not intended to replace practical thicknessmeasurements based on commercial portable tools, nor is itimplied that thickness measurements made by the two proce-dures will agree exactly.3. Apparatus3.1 Gage, equipped with a dial micrometer, a flat
6、 anvil, anda presser foot loaded by a dead mass.23.2 Dial, graduated to read to the nearest 0.01 mm, withsmall second dial graduated to read to the nearest 1 mm or tothe nearest 0.001 in. and 0.1 in. respectively.3.3 Anvil, flat, with a diameter of 0.395 6 0.02 in. (10 6 0.5mm) and projecting 0.1 in
7、. (2.5 mm) from the surface of a flatcircular platform about 2 in. (50 mm) in diameter.3.4 Presser Foot, having a flat surface 0.395 6 0.02 in. (106 0.5 mm) in diameter, and can be lifted by a lever at least 13mm or 0.5 in. It shall be dead-mass loaded to exert a total loadof 13.86 6 0.35 oz (393 6
8、10 g) on the specimen. The load isequivalent to 500 g/cm2. The contacting surface of the presserfoot and the surface of the anvil shall be parallel within 0.0001in. (0.0025 mm).4. Test Specimen4.1 The test specimen shall be a piece of leather that hasbeen conditioned and cut to the dimensions requir
9、ed for theparticular physical test.5. Procedure5.1 Place the specimen on the anvil, and lower the presserfoot gently (do not drop) until it rests on the specimen. Take thereading 5 s after the full load is reached. Read the thickness tothe nearest 0.01 mm or 0.001 in.5.2 Take the number of thickness
10、 measurements at thedesired locations as specified in the particular physical testmethod being used.6. Report6.1 The report shall include the following:6.1.1 Thickness of each specimen, reported as the averageof the thickness measurements taken, and6.1.2 Thickness of the sample, if pertinent, report
11、ed as theaverage thickness of all the specimens measured.7. Precision7.1 The coefficient of variation of measurements of thick-ness of consecutive specimens by this method is less than5.0%.8. Keywords8.1 leather; thickness1This test method is under the jurisdiction of ASTM Committee D31 on Leatheran
12、d is the direct responsibility of Subcommittee D31.07 on Physical Properties. Thistest method was developed in cooperation with theAmerican Leather ChemistsAssn(Standard Method E 41983).Current edition approved April 1, 2005. Published May 2005. Originallyapproved in 1960. Last previous edition appr
13、oved in 2000 as D 181300.2The sole source of supply of the dead-mass type gage known to the committeeat this time is Frank E. Randall Co., Inc., 246Ash Street, Watham, MA02154. If youare aware of alternative suppliers, please provide this information to ASTMHeadquarters. Your comments will receive c
14、areful consideration at a meeting of theresponsible technical committee,1which you may attend.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 asserted
15、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 time by the
16、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 receive ca
17、reful 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 Internatio
18、nal, 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 1813 00 (2005)2
