Development inhibitor releasing compounds are thioether compounds capable of releasing on reaction with color developer oxidation products, a diffusible mercaptan that inhibits further development of silver halide. Useful DIR compounds correspond to the formula ##STR1## R.sup.1 represents hydrocarbyl Y represents --S-- or --NR.sup.2 -- R.sup.2 represents hydrogen, hydrocarbyl or an electron-attracting substituent. X in its preferred embodiment represents a heteroaromatic group that when split of together with the sulfur atoms forms a silver halide development inhibiting mercaptane.
发展
抑制剂释放化合物是
硫醚化合物,能够在与显影剂氧化产物反应时释放出可扩散的巯基,从而抑制
银卤化物的进一步显影。有用的DIR化合物对应于公式##STR1##R.sup.1代表烃基,Y代表--S--或--NR.sup.2--,R.sup.2代表氢、烃基或电子吸引取代基。在其首选实施方式中,X代表一个杂芳基团,当与
硫原子一起分裂时形成
银卤化物抑制显影的巯基。