Historical

T 437

Dirt in paper & paperboard

This method (1-3) is suited for the visual estimation of dirt in paper or paperboard in terms of equivalent black area. For dirt in pulp, see TAPPI T 213 "Dirt in Pulp."

CONTENT PROVIDER
Technical Association of the Pulp and Paper Industry [tappi]

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Air permeance of paper and paperboard (sheffield method)
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