PRODUCTION METHOD FOR INK PIGMENT FOR INK JET

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a pigment for ink jet ink which has a high affinity for a material such as cloth or paper and is excellent in dyeing properties and weather resistance. SOLUTION: A solution or dispersion prepared by dissolving or dispersing an organic dye or pigment in a solvent is thermally treated under from the subcritical to supercritical conditions of the solvent.