This test method covers the determination of the water-soluble acidity or alkalinity of paper.

Formerly under the jurisdiction of Committee D06 on Paper and Paper Products, this test method was withdrawn in September 2009 due to insufficient committee interest in reviewing and revising the standard.

The pH determination measures the extent to which the paper alters the hydrogen-hydroxyl ion equilibrium of pure water, and the acidity-alkalinity determination measures the quantity of extracted ionic material that contributes to that equilibrium change. These tests are useful for routine acceptance testing, research work, or the evaluation and classification of different papers.

1.1 This test method covers the determination of the water-soluble acidity or alkalinity of paper.

1.2 It may be applied to writing, printing, and sized industrial paper but is not intended for testing electrical insulating papers nor those containing alkaline fillers or coatings such as casein or calcium carbonate.

1.3 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.