ASTM-D6657 › Historical Revision Information
Standard Test Method for pH of Wet Blue
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Scope
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.
Significance and 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.
Keywords
acidity; alkalinity; blue stock; Delta pH; pH; pH difference; wet blue; wet white; ICS Number Code 59.140.10 (Processes and auxiliary materials)
To find similar documents by ASTM Volume:
15.04 (Soaps and Other Detergents; Polishes; Leather; Resilient Floor Coverings)
To find similar documents by classification:
59.140.10 (Processes and auxiliary materials)
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Document Number
ASTM-D6657-14
Revision Level
2014 EDITION
Status
Superseded
Modification Type
Revision
Publication Date
June 15, 2014
Document Type
Test Method
Page Count
3 pages
Committee Number
D31.02