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TAPPI T 462 cm-06 Castor Oil Penetration Test for Paper
standard by Technical Association of the Pulp and Paper Industry, 10/08/2009
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This standard is a corrected version of T 462 om-06.CORRECTION--OCTOBER 8, 2009
An editorial correction has been incorporated into thisversion of T 462. When the 2006 edition was approved,it had been revised as a Classical Method. The error onthe original publication after this approval was that theheadings were not changed to indicate thisreclassification. This version corrects that error. Alsocorrected is a split footnote that appeared in theprevious version
This method is used to measure the absorbency rate of paper for printing inks having an oil vehicle. It is normally used only for easily permeable papers such as news, book, and mimeograph (1,2); however, it can be helpful for any paper where the absorbency of an oil based vehicle is important.
A correlation has been established between the results of this test and the printing quality of uncoated papers. The oil absorbency of paper is related to the porosity and internal structure of the paper.