| abstract |
The invention relates to novel quinacridone mixed crystal pigments consisting ofa) from 82.5 to 99% by weight of unsubstituted gamma-phase quinacridone of the formula (I)in which R1 and R2 are hydrogen atoms andb) from 1 to 17.5% by weight of one or more 2,9- and/or 3,10-substituted quinacridones of the formula (I) in which the substituents R1 and R2 are identical or different and are chlorine, bromine or fluorine atoms or C1-C4-alkyl, C1-C4-alkoxy or carboxamido groups which can be substituted by C1-C6-alkyl groups, and R1 can additionally be a hydrogen atom, and to pigment preparations comprising said quinacridone mixed crystal pigments. |