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T 441

Water absorptiveness of sized (non-bibulous) paper, paperboard, and corrugated fiberboard (cobb test)

This method describes a procedure for determining the quantity of water absorbed by nonbibulous paper, paperboard, and corrugated fiberboard in a specified time under standardized conditions. It is based on studies by Cobb and Lowe (1), Cobb (2) and other investigators (3, 4).For testing unsized and absorbent paper, paperboard, or corrugated fiberboard, see TAPPI T 432 "Water Absorbency of Bibulous Paper" and TAPPI T 561 "Sorptive Rate and Capacity of Bibulous Paper and Paper Products Using Gravimetric Principles"


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Technical Association of the Pulp and Paper Industry [TAPPI]


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