Standard: PAPTAC - D.38P
SIZE TEST FOR PAPER AND PAPERBOARD BY INK RESISTANCE (HERCULES – TYPE TESTER)
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This method (Ref. 1, 2, 3) measures the resistance of paper to permeation of an aqueous penetrant and is a useful general purpose test for degree of sizing. It is applicable to most bleached, unbleached, and colored paper or boards which are surface sized and/or internally sized.
It is not applicable to transparent or translucent papers (e.g., low grammage papers where the ink affects the reflection from the measured surface), colored papers that do not contrast with the green test ink, or papers having as part of their structure an effective water barrier such as polyethylene film. The test appears suitable for use on papers containing calcium carbonate (Ref. 4).
An alternate method should be used for the direct comparison of papers which differ significantly in brightness, color, opacity, grammage, or filler content, such as may exist among different grades of paper. This limitation does not apply to normal production variations in these properties. It is a good test for comparing different samples of the same grade.
|Organization:||Pulp and Paper Technical Association of Canada, Formerly CPPA|
|Most Recent Revision:||YES|
|Document #||Change Type||Update Date||Revision||Status|
|D.38P||Change Type:||Update Date: 1998-11-01||Status: INAC|
This Standard References
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