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.
ASTM
Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (Hot-Extraction and Cold-Extraction Procedures) (Withdrawn 2010)
STD-64711
1997
2007-12-01
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