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25 articles

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Offset Ink Formulation: Varnish, Pigment, and Additive Selection for Sheet-Fed and Web

Offset inks must balance pigment strength, drying speed, and end-use performance across sheet-fed and web processes. This technical guide details varnish selection (PMR vs. maleic resins), pigment choices (PY 13, PR 57:1, PB 15:3), and additive packages for tack, drying, and rub resistance. Includes dosage ranges, comparative tables, and troubleshooting insights. Data-driven guidance for formulators, R&D chemists, and procurement engineers.

Sep 22, 2025·8 min

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