Patent ID: 7377974

Claim:
A method for pigmenting an electrophotographic toner, electrophotographic developer, ink, aqueous binder system or color filter comprising the step of adding to the electrophotographic toner, electrophotographic developer, ink, aqueous binder system or color filter a pigment preparation comprising C.I. Pigment Yellow 74 as base pigment and one or more pigment dispersants, wherein the one or more pigment dispersants are selected from the group consisting of C.I. Pigment Yellow 61, 61:1, 62, 62:1, 168, 169, and 191:1, or a combination of compounds of the formula (IV) and (V) wherein R 1 , R 2 , R 3 , R 4 , R 5 , and R 6 independently of one another are hydrogen, halogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, nitro, trifluoromethyl, cyano, phenyl, SO 3 − E + - or COO − E + , with the proviso that there is at least one and not more than two ionic groups of type SO 3 − E + - or COO − E + , and that, in the case of two ionic groups, one ionic group is located in the R 1 , R 2 or R 3 position and the other ionic group is located in the R 4 , R 5 or R 6 position of the compounds of the formulas (IV) and (V); E + is H + ; an equivalent metal cation M m+ , m being the number 1, 2 or 3; a phosphonium ion; or an unsubstituted or substituted ammonium ion.