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1.1 This test method covers the determination of the rate at which blotting papers absorb writing ink. Its applicability to other papers and liquids has not been determined. It yields results that have been found useful in predicting and specifying the absorptive quality of blotting papers.

1.2 The test method is based on the determination of the length of time required to absorb completely 1 mL of a standard writing ink at 23

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