The present invention concerns an auxochrome substituent for an oxidative dye coupler. The auxochrome substituent enables ready developer reaction with the coupler to form azomethine and leuco dyes. Manipulation of the auxochrome substituent enables a bathochromic or hypsochromic shift of the light absorbance by the azomethine dye formed with the auxochrome substituted coupler.
本发明涉及一种氧化
染料偶联剂的助色取代基。助色取代基能使显影剂与耦合剂发生反应,生成偶氮
甲胺染料和白基
染料。操纵助色取代基可以使与助色取代的
偶联剂形成的偶氮
染料的光吸收率发生浴变色或次变色偏移。