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TAPPI T 226 cm-11
- Specific external surface of pulp
- standard by Technical Association of the Pulp and Paper Industry, 01/01/2011
- Publisher: TAPPI
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This method, based on the silvering method devised by Clark (1), is used to determine the specific exposed surfaceof unbeaten, or only slightly beaten, chemical pulps, groundwood, wood flour, and similar materials. It is not suitable forfinely fibrillated or well-beaten fibers, since the silvering step causes some of the finest fibrils to collapse and hencelowers the exposed area (2).