These test methods cover two procedures for determination of the hydrogen ion concentration, expressed in terms of pH, of an aqueous extract of paper.
Formerly under the jurisdiction of Committee D06 on Paper and Paper Products, this test method was withdrawn in February 2010 because an equivalent TAPPI publication exists.
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:
|Test Method A—pH of Paper (Unfiltered Extract) After|
Extraction for 1 h in Cold (25 ± 5°C) Water
|Test Method B—pH of Paper (Unfiltered Extract) After|
Extraction for 1 h in Boiling Water
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.
cold extraction; hot extraction; industrial paper; paper; paper acidity; paper aging; paper alkalinity; pH; printing papers; writing papers ;
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Citing ASTM Standards
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