| 摘要 |
Azomethine pigments of the formula <IMAGE> or of the tautomeric formula <IMAGE> in which D denotes the radical of an aromatic or heteroaromatic amine which is free from sulphonic acid groups, R1 denotes hydrogen or C1-C4-alkyl, in particular methyl, or both the R1, at the same time, denote CO, R2 denotes a substituent, m denotes an integer, preferably 1 or 2, and n denotes 0, 1, 2, 3 or 4, a processes for their preparation.
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