发明授权
- 专利标题： Photographic products and processes
- 专利标题（中）： 摄影产品和工艺
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申请号： US252661申请日： 1988-10-03
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公开(公告)号： US4886733A公开(公告)日： 1989-12-12
- 发明人: Myron S. Simon
- 申请人： Myron S. Simon
- 申请人地址： MA Cambridge
- 专利权人： Polaroid Corporation
- 当前专利权人： Polaroid Corporation
- 当前专利权人地址： MA Cambridge
- 主分类号： G03C8/36
- IPC分类号： G03C8/36 ; G03C8/48
摘要：
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 unexpectedly enhanced opacification in the red and near infrared region of the visible spectrum is achieved by employing phenanthrol/carboxynaphthol phthaleins as the light-absorbing, pH-sensitive optical filter agent for the longer wavelength region of the visible spectrum.
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