RESIN FOR LITHOGRAPHIC PRINTING INK, LITHOGRAPHIC PRINTING INK, AND PRINTED MATTER

摘要

PROBLEM TO BE SOLVED: To provide a synthesis method of a resin for a lithographic printing ink having good printability and capable of giving a high-quality printed matter with high glossiness, and an ink using the resin.SOLUTION: A lithographic printing ink containing a rosin-modified phenolic resin (A) described below has excellent printability and gives excellent glossiness of a printed matter. The rosin-modified phenolic resin (A) is prepared by reacting rosin (a) and a polyol (b) to obtain a rosin polyol ester having an acid value of less than 15, and further reacting the obtained rosin polyol ester with a novolac resol type phenolic resin (cd).