| 摘要 |
There is described a photograhic method employing a positive-negative diffusion transfer film unit wherein there is formed a positive silver transfer image which may be viewed as a positive transparency without being separated from the developed negative silver image, including an embodiment wherein additive color projection positive images are formed. According to the method, the exposed film unit is developed by contacting the silver halide emulsion layer with a photographic processing composition which comprises an aqueous alkaline solution containing a silver halide developing agent and a silver complexing agent. The silver complexing agent is stable in an alkaline environment, has a melting point less than about 50 DEG C. preferably about 25 DEG C. or less, and the log of the stability constant ( beta ) for a 1:1 complex of the complexing agent with silver is at least about 10.5. The film unit is not washed during the method. According to the method of the invention crystal formation in the transparency is substantially or completely eliminated.
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