Use of mixed-crystal pigments of the quinacridone series in electrophotographic toners and developers, powder coatings and inkjet inks

A method of coloring electrophotographic toners and developers, powder coating materials, inkjet inks, electret fibers, and color filters comprising the step of combining a mixed-crystal pigment of the quinacridone series consisting of

• a) from 85 to 99% by weight of unsubstituted β-phase quinacridone of the formula (I)
• in which R1 and R2 are hydrogen atoms, and
• b) from 1 to 15% by weight of one or more 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 hydrogen,
• with a toner binder, powder coating resin, electret material, color filter and injet ink base.