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ASTM D2346-21

(Test Method)

Standard Test Method for Apparent Density of Leather

Standard Test Method for Apparent Density of Leather

SIGNIFICANCE AND USE
4.1 This test method is designed to determine the apparent density of specimens from their area and thickness. By measuring apparent density, the degree of loading or of compression of leather can be evaluated. The test method is unsuitable for very soft leathers such as chamois whose thickness cannot be accurately measured by the test method cited.
SCOPE
1.1 This test method covers the determination of the apparent density of specimens of leather. This test method does not apply to wet blue or wet white.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
30-Nov-2021
ICS
59.140.30 - Leather and furs
Technical Committee
D31 - Leather
Drafting Committee
D31.03 - Footwear
Current Stage
Ref Project

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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D2346 − 21
Standard Test Method for
1
Apparent Density of Leather
This standard is issued under the fixed designation D2346; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3.1.1 apparent density—the weight of a unit volume of bulk
leather conditioned according to Practice D1610.
1.1 This test method covers the determination of the appar-
ent density of specimens of leather. This test method does not
4. Significance and Use
apply to wet blue or wet white.
4.1 This test method is designed to determine the apparent
1.2 The values stated in inch-pound units are to be regarded
density of specimens from their area and thickness. By
as standard. The values given in parentheses are mathematical
measuring apparent density, the degree of loading or of
conversions to SI units that are provided for information only
compression of leather can be evaluated. The test method is
and are not considered standard.
unsuitable for very soft leathers such as chamois whose
1.3 This standard does not purport to address all of the
thickness cannot be accurately measured by the test method
safety concerns, if any, associated with its use. It is the
cited.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
5. Apparatus
mine the applicability of regulatory limitations prior to use.
5.1 Round Die, 2.7 in. to 3.0 in. (68.6 mm to 76.2 mm) in
1.4 This international standard was developed in accor-
diameter.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5.2 Mallet or Clicking Machine.
Development of International Standards, Guides and Recom-
1
5.3 Rule or Steel Tape, graduated in ⁄32 in. or 0.02 in. or in
mendations issued by the World Trade Organization Technical
millimetres.
Barriers to Trade (TBT) Committee.
5.4 Balance and set of weights.
2. Referenced Documents
5.5 Thickness Gauge as described in Test Method D1813.
2
2.1 ASTM Standards:
D1610 Practice for Conditioning Leather and Leather Prod- 6. Test Specimen
ucts for Testing
6.1 The test specimen shall be a disk of leather that has been
D1813 Test Method for Measuring Thickness of Leather
conditioned as specified in 3.1.1. This specimen may be the
Test Specimens
same as that used in Test Method D2347.
D2347 Test Method for Measuring Area of Leather Test
Specimens
7. Procedure
7.1 Weigh the specimen to the nearest 0.001 g.
3. Terminology
7.2 Measure the thickness to the nearest 0.025-cm in four
3.1 Definitions:
quadrants of th
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it 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 version
of the standard as published by ASTM is to be considered the official document.
Designation: D2346 − 13 D2346 − 21
Standard Test Method for
1
Apparent Density of Leather
This standard is issued under the fixed designation D2346; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This test method covers the determination of the apparent density of specimens of leather. This test method does not apply
to wet blue.blue or wet white.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D1610 Practice for Conditioning Leather and Leather Products for Testing
D1813 Test Method for Measuring Thickness of Leather Test Specimens
D2347 Test Method for Measuring Area of Leather Test Specimens
3. Terminology
3.1 Definitions:
3.1.1 apparent density—the weight of a unit volume of bulk leather conditioned according to Practice D1610.
4. Significance and Use
4.1 This test method is designed to determine the apparent density of specimens from their area and thickness. By measuring
apparent density, the degree of loading or of compression of leather can be evaluated. The test method is unsuitable for very soft
leathers such as chamois whose thickness cannot be accurately measured by the test method cited.
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 method
was developed in cooperation with the American Leather Chemists Assn. (Standard Method E62 – 1972).
Current edition approved May 1, 2013Dec. 1, 2021. Published May 2013January 2022. Originally approved in 1965 as D2346 – 65 T. Last previous edition approved in
20122013 as D2346 – 00D2346 – 13.(2012). DOI: 10.1520/D2346-13.10.1520/D2346-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact AS
...

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