TAPPI T 658 : CM 85
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
PROPERTIES OF DIATOMACEOUS SILICA
23-07-2013
12-01-2013
Is for sampling and testing diatomaceous silica (commonly used as a filter in paper) for free moisture, loss on ignition and volatile matter, pH, wet density, brightness, and 325 mesh residue. The powder, also known as diatomite or diatomaceous earth, is a naturally occurring, amorphous silica formed of the fossilized remains of single-celled marine and fresh-water diatoms.
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