Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to immobile compounds which can be used to provide positive images from negative recording-developing photographic materials such as negative silver halide emulsions. The compounds contain a photographically useful group such as a dye or dye precursor and are capable of releasing said photographically useful group under alkaline conditions, and are also capable of reaction with an oxidized silver halide developing agent before substantial release of said photographically useful group occurs, to provide a reaction product having a substantially lower rate of release of said photograhically useful group.
本发明揭示了摄影元素、形成摄影元素中图像的过程和新化合物。一般而言,本发明涉及不可移动的化合物,可用于从负记录-显影摄影材料(如负
银卤乳剂)中提供正像。该化合物含有摄影有用基团,如
染料或
染料前体,并能在碱性条件下释放该摄影有用基团,同时还能在大量释放该摄影有用基团之前与
氧化银卤显影剂反应,以提供反应产物,其释放该摄影有用基团的速率显著降低。