This invention relates to diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes wherein enhanced opacification particularly, in the green region of the visible spectrum is achieved by employing a 7-sulfonamido/5- or 6-sulfamoyl indole phthalein as the light-absorbing, pH-sensitive optical filter agent for the shorter wavelength region of the visible spectrum.
这项发明涉及适用于在环境光下进行的扩散转移摄影过程,以及在这种过程中有用的扩散转移产品,其中通过采用7-
磺胺基/5-或6-磺酰胺基
吲哚酞为光吸收、pH敏感的光学滤光剂,特别是在可见光谱的绿色区域实现增强的不透明度。