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  • ASTM
    D6657-08 Standard Test Method for pH of Wet Blue
    Edition: 2008
    $91.10
    Unlimited Users per year

Description of ASTM-D6657 2008

ASTM D6657 - 08

Standard Test Method for pH of Wet Blue

Active Standard ASTM D6657 | Developed by Subcommittee: D31.02

Book of Standards Volume: 15.04




ASTM D6657

Significance and Use

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.

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

1. 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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D6659 Practice for Sampling and Preparation of Wet Blue for Physical and Chemical Tests


Keywords

acacidity; alkalinity; blue stock; Delta pH; pH; pH difference; wet blue; wet white; pH; Wet blue ;


ICS Code

ICS Number Code 59.140.10 (Processes and auxiliary materials)


DOI: 10.1520/D6657-08

ASTM International is a member of CrossRef.

ASTM D6657

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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