Pigment composition and printing ink containing the same

摘要

A pigment composition obtainable by dry-milling an organic pigment in the presence of a resin for a printing ink, the resin being composed of a synthetic resin for a printing ink in an amount of 10 to 80 parts by weight per 100 parts by weight of the organic pigment and an aliphatic hydrocarbon resin which is extracted from gilsonite and has a softening point of 120 to 125° C. in an amount of 0.1 to 5 parts by weight per 100 parts by weight of the organic pigment.