Abstract: A mixed crystal of two or more different benzimidazolonedioxazine compounds of the formula (1) where X and X′ are identical or different and are hydrogen or halogen, R1, R1′, R2 and R2′ are identical or different and are hydrogen, C1-C18 alkyl, trifluoromethyl, C1-C18 alkylcarbonyl, C5-C6 cycloalkyl or phenyl which may be unsubstituted or substituted by one or more halogen atoms, nitro groups, trifluoromethyl, C1-C18 alkyl, C1-C18 alkoxy, C1-C18 alkylcarbonyl and/or C1-C18 alkoxycarbonyl groups. The mixed crystals are of low solubility and feature good fastness properties and red to blue colorations. The mixed crystals are suitable for pigmenting paints, plastics, printing inks, aqueous or solvent-based pigment preparations, electrophotographic toners and developers, powder coating materials, inks, preferably inkjet inks, color filters, and for coloring seed and cosmetics.

Abstract: Process for phase conversion of a methyl-substituted, benzimidazolone-fused dioxazine pigment of composition C22H12Cl2N6O4 having the formula (1) or of an isomer or tautomer thereof, which comprises treating the pigment of formula (1) with certain organic solvents. In the course of this phase conversion, 4 novel crystal polymorphs are formed which are called phases II, IV, V and VI and are characterized by means of their X-ray powder diagrams. The novel polymorphs are of low solubility and feature good fastness properties and violet colorations. The novel crystal polymorphs are suitable for pigmenting coating materials, plastics, printing inks, aqueous or solvent-based pigment preparations, electrophotographic toners and developers, powder coating materials, inks, preferably inkjet inks, and color filters, and for coloring seed.

Abstract: The invention provides hybrid pigments containing: (a) at least one benzimidazolone triphenodioxazine compound of the formula (I)  and (b) at least one pyrrolo-[3,4-c]-pyrrole compound, or (c) at least one thiazine-indigo compound, or (d) at least one quinacridone compound or (e) at least one copper phthalocyanine compound and a process for the preparation of such hybrid pigments and their use for the mass pigmentation of substrates, as colorants in electrophotographic toners and developers, in powders and powder coating materials, in ink-jet inks and in cosmetic compositions.

Abstract: Process for phase conversion of a methyl-substituted, benzimidazolone-fused dioxazine pigment of composition C22H12Cl2N6O4 having the formula (1) 1

Abstract: A mixed crystal of two or more different benzimidazolonedioxazine compounds of the formula (1) 1