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 a substantial increase in opacification in the red and near infrared region of the visible spectrum and a substantial increase in opacification in the blue and green region is achieved by employing certain alkyl-substituted phenanthrol/carboxynaphthol phthaleins as the light-absorbing, pH-sensitive optical filter agent for the longer wavelength region of the visible spectrum.
本发明涉及扩散转移摄影工艺,适用于在环境光线下进行,并涉及在此类工艺中有用的扩散转移产品。通过采用某些烷基取代的
菲啰啉/羧基
萘酚菲啰啉作为吸收光线、pH敏感的光学滤光片,可在可见光谱的较长波长区域实现红色和近红外区域的不透明度大幅增加以及蓝色和绿色区域的不透明度大幅增加。