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ASTM D2941-21

Current Revision

Standard Test Method for Measuring Break Pattern of Leather (Break Scale)

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1.1 This test method covers the measurement of the break pattern of shoe upper leather using an arbitrary break scale. 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.


4.1 Break depends on the fiber structure and on the relation between the grain and other strata of the leather. A fine break, or a grain pattern which shows many fine wrinkles when it is bent to form a concave surface, as it is in the vamp of a shoe, reflects favorably upon appearance and serviceability. A coarse break, on the other hand, where a few coarse wrinkles are formed on bending the grain to form a concave surface may indicate that the grain layer is separating from the corium or main stratum as in pipey leather. Shoes made from fine-break leather are more attractive and tend to wear longer than shoes made from coarse-break leather. (See MIL-STD 663 and the ALCA Journal).4

SDO ASTM: ASTM International
Document Number D2941
Publication Date Dec. 1, 2021
Language en - English
Page Count 2
Revision Level 21
Supercedes
Committee D31.03
Publish Date Document Id Type View
Dec. 1, 2021 D2941-21 Revision
May 1, 2013 D2941-13 Revision
Sept. 10, 2000 D2941-00 Revision
Sept. 1, 2012 D2941-00R12 Reaffirmation
Sept. 1, 2008 D2941-00R08 Reaffirmation
Sept. 1, 2004 D2941-00R04 Reaffirmation