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  • ASTM
    D778-97(2007) Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (Hot-Extraction and Cold-Extraction Procedures) (Withdrawn 2010)
    Edition: 2007
    $82.37
    Unlimited Users per year

Description of ASTM-D778 2007

ASTM D778-97-Reapproved2007

Withdrawn Standard: Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (Hot-Extraction and Cold-Extraction Procedures) (Withdrawn 2010)




ASTM D778

Scope

1.1 These test methods cover two procedures for determination of the hydrogen ion concentration, expressed in terms of pH, of an aqueous extract of paper.

1.2 These test methods may be applied to writing, printing, and sized industrial papers.

1.3 These test methods are not intended to be used for determination of pH of insulating papers, for that see Test Methods D 202.

1.4 The test methods appear as follows:

Section
Test Method ApH of Paper (Unfiltered Extract) After
Extraction for 1 h in Cold (25 ± 5°C) Water
11.1
Test Method BpH of Paper (Unfiltered Extract) After
Extraction for 1 h in Boiling Water
11.2

1.5 Specifications may be based on Test Method A or Test Method B, or both.

1.6 Where a specification or specific instructions or agreement to use only one of these test methods is absent, determine pH using both procedures, and interpret results based on Section 12.

1.7 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.

Keywords

cold extraction; hot extraction; industrial paper; paper; paper acidity; paper aging; paper alkalinity; pH; printing papers; writing papers


ICS Code

ICS Number Code 85.060 (Paper and board)


DOI: 10.1520/D0778-97R07

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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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