A defect in printing characterized by improperly-dried ink being easily rubbed off the paper, although ink setoff rarely occurs. Chalking is caused by an incompatibility between the ink and a coated paper that results in the inactivation of the drier in the ink. Ink that is chalking right off the press will eventually dry completely, although GATF has found that it can sometimes be days or even weeks before ink that has not been properly formulated for a particular paper coating will dry.
|