Patent ID: 7723530

Claim:
A process of manufacturing a color filter with high transparency and pure hue wherein a pigmented high molecular weight organic material layer is applied to a transparent substrate, wherein the improvement consists of dispersing or dissolving from 1 to 75% by weight, based on the overall dry weight of the pigmented high molecular weight organic material layer, of a diketopyrrolopyrrole of formula (V) in a photosensitive or heat sensitive material and coating, printing, laminating or otherwise depositing the thus obtained dispersion or solution to form said pigmented high molecular weight organic material pigmented layer, wherein R 21 and R 22 are independently of one another hydrogen, C 1 -C 18 alkyl, C 02 -C 18 alkyl which is interrupted one or more times by O or S, benzyl, 2-benzyl-2-propyl, β-phenyl-ethyl, α,α-dimethylbenzyl, ω-phenyl-butyl, ω,ω-dimethyl -ω-phenyl-butyl, said benzyl, 2-benzyl-2-propyl, β-phenyl-ethyl, α,α-dimethylbenzyl, ω-phenyl-butyl or ω,ω-dimethyl-ω-phenyl-butyl substituted on aromatic protion by one or more C 1 -C 4 alkyl groups or C 1 -C 4 alkoxy groups, or a group of the formula in which R 5 is C 1 -C 18 alkyl, R 23 and R 24 independently of one another are a group of formula —X 1 —X 2 —X 3 , wherein X 1 is —O—, —S—, —NH—, —CONH—, —COO—, —SO 2 —NH—, or —SO 2 —O—, X 2 is C 1 -C 18 alkylene, optionally containing one or more groups —O—, —S— or —NR 14 —, X 3 is —OH, —NH 2 , —C(R 11 )═CH 2 , —OC(O)—C(R 12 )═CH 2 or —C(O)—C(R 12 )═CH 2 ; wherein R 11 is hydrogen, or methyl, R 12 is hydrogen, or methyl, and R 14 is hydrogen, C 1 -C 8 alkyl, or C 6 -C 12 aryl.