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This method (1, 2) is adapted to the numerical estimation of dirt in pulp and recycled pulps in terms of equivalent black area.The results will differ from those obtained by TAPPI T 246 Foreign Particulate Matter in Pulp by Transmitted Light in that it is the contrasting color of foreign matter rather than its opaqueness that affects the result.

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Published: 10/01/2010 Number of Pages: 4