Claims
- 1. A process for increasing during development the effective speed of an exposed silver-sensitized photographic film and the like by a factor of at least 4 to 10 times the ASA speed rating, that comprises developing and fixing the exposed film to provide a reduced silver image; re-halogenating or bleaching said reduced silver image to convert the same to a silver halide or soluble silver complex; and re-developing the film in a color-coupling developer in the presence of color-coupling dye units to reduce the image to silver units and proximal color units, each of the last-mentioned silver units having multiple proximal color units associated therewith as the result of (1) providing of the order of 6 color-coupling dye units in the color-coupling developer for every 2 units of color-coupling developer or (2) repeating the re-halogenating or bleaching and subsequent re-developing a sufficient number of times in the presence of sufficient color-coupling dye units to produce the speed increase.
- 2. The process as claimed in claim 1, wherein the last-mentioned silver units are removed from the film and the film is washed and dried.
- 3. The process as claimed in claim 1, wherein the film is washed and dried with the last-mentioned silver units remaining in the film.
- 4. The process as claimed in claim 1, wherein the film is a black and white type and said color-coupling dye units are present in the color-coupling developer.
- 5. The process as claimed in claim 1, wherein the film is a color type with the color-coupling dye units incorporated in the film, and wherein the association of silver units with multiple color units is accomplished by repeating the re-halogenating or bleaching and subsequent re-developing steps.
Parent Case Info
This is a continuation application of Ser. No. 943,319, filed Sept. 18, 1978, now abandoned.
US Referenced Citations (8)
Continuations (1)
|
Number |
Date |
Country |
Parent |
943319 |
Sep 1978 |
|