Quick-Set Ink

A type of printing ink comprising a balanced solvent-resin-oil vehicle. When quick-set inks are printed, the solvent quickly drains out of the ink film through absorption into the substrate, leaving behind a film of resin and oil, which then quickly hardens by oxidation and polymerization. (See Resin-Oil Vehicle.) Quick-set inks are used frequently in letterpress and offset lithography for their rapid drying and compatibility with cast-coated and enamel papers. Quick-set inks have high gloss. A recent problem with quick-set inks, typically occurring on multi-unit presses, is a printing defect called back trap mottle. (See Back Trap Mottle.) A new innovation in quick-set inks is super quick-set infrared ink that utilizes the application of heat energy—in the form of infrared radiation—to accelerate the drying process. (See Super Quick-Set Infrared Ink.)

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