ASTM D7734/D7734M Open Time of Oxidative Printing Inks
ASTM D7734/D7734M describes a finger transfer method for determining the stay open time of oxidative drying printing inks and overprint varnishes. A wet ink/varnish film is defined as open. Oil-based sheetfed offset, letterpress, and screen inks are examples of inks and overprint varnishes that dry through oxidation.
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