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ASTM D6657-14ae1

Historical Revision

Standard Test Method for pH of Wet Blue and Wet White

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1.1 This test method covers the determination of the pH of all types of wet blue and wet white.

1.2 For pH of wet white, the procedure is identical, substitute wet white for wet blue in the standard method.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.


4.1 This test method is designed to measure the pH of a distilled-water extract of wet blue. This is considered to be a measure of the acidity or alkalinity of the wet blue. Excessive acidity or alkalinity may have a deleterious effect on the aging characteristics of wet blue and the leather made from it.

4.2 This test method is suitable for development, control, and service evaluation of wet blue.

SDO ASTM: ASTM International
Document Number D6657
Publication Date May 1, 2014
Language en - English
Page Count 3
Revision Level 14ae1
Supercedes
Committee D31.02
Publish Date Document Id Type View
June 1, 2016 D6657-16 Revision
May 1, 2014 D6657-14AE01 Revision
May 1, 2014 D6657-14A Revision
April 1, 2014 D6657-14 Revision
Sept. 1, 2008 D6657-08 Revision
May 10, 2001 D6657-01 Revision
Sept. 1, 2021 D6657-16R21 Reaffirmation
Oct. 1, 2006 D6657-01R06 Reaffirmation