Shanghai Hucai Chemical Co., Ltd.

※ Preparation of diazo components

 


Accurately weigh the diazo component


stir and dissolve

 

※ Coupling component preparation

 


Accurately weigh the diazo component


heat and stir to dissolve

 

※ Coupling reaction

 

 

※ Pigmentation reaction

 


Insulation treatment


High pressure treatment


Filtering, washing


Pigment filter cake