論文(Article) We prepared some fast directazodyes, which have 4-amino-2-methyl-5-methoxy-1, 1'-azobenzene-4'-sulphonic acid as a diazocomponent and J-acid, acetyl-, benzoyl-, furfuroyl-, cinnamoyl-, p-toluenesulphonyl, phenyl-, and p-tolyl-J-acids as couplingcomponents respectively. And then we compared their properties with one another and with those of the dyestuffs already reported in the kogyo-kagaku-kaishi, (45__,767:47__,80:53__,77,118) which have the above mentioned couplingcomponents and aminoazobenzenesulphonic acid as a diazocomponent severally. The following results were obtained;　1) The dyes of this type are violet directdyes and have a pretty good light and washing-fastness.　2) Introduction of methyl and methoxy groups into both o-positlons of two p-azogroups of the middle benzene nucleus improves washing fastness and decreases light fastness.　3) Introduction of an acyl or an aryl group into the amino group of J-acid improves light fastness and has scarcely any influence on washing fastness.　4) In the acylation or arylation of the amino group of J-acid, acetyl and　5) Substantivity is decreased by introduction of acetyl and ...