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.
本发明涉及适用于在有环境光的情况下进行的扩散转移照相工艺,以及在这种工艺中使用的扩散转移产品,其中,通过使用某些烷基取代的
菲醇/羧基
萘酚酞作为可见光谱长波长区的光吸收、pH 值敏感的光学滤光剂,可大大提高可见光谱红色和近红外区的不透明度,并大大提高蓝色和绿色区的不透明度。