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.
本发明涉及扩散转移摄影工艺,适用于在环境光下进行,并涉及在这种过程中有用的扩散转移产品,其中通过使用7-磺酰胺基/5-或6-磺酰胺基
吲哚菲酞作为对可见光短波长区域的光吸收、pH敏感的光学滤波剂,实现了增强的不透明度,特别是在可见光谱的绿色区域。