Offset lithographic printing process with a water based ink
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United States of America Patent
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Jul 14, 1998
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app pub date -
Mar 13, 1996
filing date -
Mar 13, 1996
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Abstract
An offset lithographic printing process comprising printing at a relative humidity of 75-90% utilizing a water-based, single fluid, fountain solution free, printing ink containing (a) a macromolecular binder composed of binders soluble in water regardless of the pH of the water; resin rosin salt binders soluble in water at a pH from 7.5 to 10; and aqueous emulsion binders; (b) pigment and; (c) a re-wetting agent.
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