| 摘要 |
PURPOSE:To obtain the reducing soln. having a good reducing property, i.e., large reducing range by incorporating a 1, 3-diamino propane tetraacetic ferric chelate compd. into the reducing soln. CONSTITUTION:The 1, 3-diamino propane tetraacetic ferric chelate compd. is incorporated into the image reducing soln. of a silver halide photosensitive material. While the content thereof varies with the kinds of the photosensitive materials to be used, the density of the silver images, etc., about 5-50g/l is preferred. Preservatives such as complexing agent, pH buffer and sulfite are used at need. A surface active agent and thickener are otherwise incorporated therein. This reducing soln. is effective in a 4-8 pH range. The effect of widening the reducing range is exhibited by using such reducing soln. |
