similar C.I. Sulphur Red?6?(C.I. 53720) stated in the method, just in the vulcanization reaction do not add copper sulfate. According to the requirements of the color, in vulcanization reaction to adjust the (decrease) the proportion of copper sulfate can be obtained by the dark red color to red light brown dye.
Properties and Applications
dark red. In the water partly dissolved; In concentrated sulfuric acid for blue purple, dilution after brown precipitation; In the sodium sulfide solution solubility is good, for the red light brown.
