Pigment compounds and method of preparations

There are provided new pigments of the "bismethinic" type having the formula where A is benzene, 2,5-dimethoxy-benzene, 2,5-dichlorobenzene, naphthalene, diphenyl or anthracene, and B is azobenzene, azotoluene, 2-methoxy-5-benzanilide, 2-methoxy-3',4'-chloroazobenzene, 2-hydroxy-5-methyl-benzene, 2-methoxy-5-benzoylamino-benzene, 2-methoxy-5-ureido-benzene, 2-chloro-5-carboxybenzene, 2,4-dichloro-benzene, 2,5-dimethoxy-4-chloro-benzene, benzothiazole, 1-(3-chlorophenyl)-pyrazole, 1-(3,4-dichlorophenyl)-pyrazole, indazole, 2,4-dimethoxy-benzene, 4-dimethylamino-benzene, benzimidazolone, 2-methoxy-5-acetylamino-benzene or 2-methoxy-benzene.