The invention relates to mixed crystals of 1,4-diketopyrrolo\x9b3,4-c!pyrroles, consisting of 1 mol each of two different compounds of formulae ##STR1## as well as single-phase solid solutions of two different compounds of formulae I and II, wherein the diketopyrrolopyrrole having the smaller geometrical constitution is present in an amount of 53 to 70 mol %. A and B are as defined in claim 1. The novel mixed crystals as well as the novel solid solutions are admirably suited for pigmenting organic material of high molecular weight.
                            本发明涉及1,4-二酮
吡咯烷并[3,4-c]
吡咯烷的混合晶体,由两个不同的化合物的摩尔比为1:1组成,分别为公式I和II。同时,本发明还涉及两个不同化合物的单相固溶体,其中具有较小几何构型的二酮
吡咯烷并[3,4-c]
吡咯烷的含量为53-70摩尔%。其中,A和B如权利要求1所定义。这些新型混合晶体以及新型固溶体非常适合用于高分子有机材料的
着色剂。