| 摘要 |
A method for preparing a pigment composition is provided to produce the pigment composition capable of forming red filters having excellent brightness. A method for preparing a pigment composition includes a step of wet- or dry-grinding a pigment selected from the group consisting of dianthraquinone pigments, diketopyrrolopyrrole pigments, and mixtures thereof in the presence of a compound represented by the following formula 1. In the formula, Q represents an -NH(CH2)nNR^1(R^2) group or hydroxyl group, R represents an -NH(CH2)nNR^1(R^2) group, wherein each of R^1 and R^2 independently represents a C1-4 alkyl group or R^1 and R^2 form a 5- or 6-membered heterocyclic ring containing a nitrogen atom(and further a nitrogen or oxygen atom) together with a nitrogen atom to which R^1 and R^2 are bonded, and n is an integer of 1-4.
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