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ASTM D2210-21

Current Revision

Standard Test Method for Grain Crack and Extension of Leather by the Mullen Test

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1.1 This test method covers the determination of the resistance of leather to grain cracking and for measuring the extension of the leather. It is limited to light leathers such as shoe uppers, garment, gloves, and upholstery. 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 The test method is designed to measure the force required to crack the grain of leather by steady hydraulic pressure on a diaphragm of definite diameter applied to the flesh side of the specimen to form a sphere. The cracking of the grain is a result of failure under elongation or stretch. The elongation or stretch of the leather can be measured at different loads or at the failure of the grain to determine if the stress leather will withstand under lasting conditions. Cuts, scratches, and other defects will cause considerable variation in the results by concentration of the applied force to the weak points. This test method is excellent for manufacturing control, specification acceptance, and service evaluation in the lasting property of leather. This test method may not apply when the conditions of the test employed differ widely from those specified in the test method.

SDO ASTM: ASTM International
Document Number D2210
Publication Date Dec. 1, 2021
Language en - English
Page Count 7
Revision Level 21
Supercedes
Committee D31.03
Publish Date Document Id Type View
Dec. 1, 2021 D2210-21 Revision
Nov. 1, 2013 D2210-13 Revision
Sept. 10, 2000 D2210-00 Revision
Sept. 1, 2012 D2210-00R12 Reaffirmation
Sept. 1, 2008 D2210-00R08 Reaffirmation
Sept. 1, 2004 D2210-00R04 Reaffirmation