| 摘要 |
<p>A method for the production of a silver image by the silver complex diffusion transfer reversal process, said method comprising the following steps : (I) image-wise photo-exposing a silver halide emulsion layer of a photographic silver halide emulsion material having in waterpermeable relationship with the silver halide at least one developing agent, (II) wetting with a practically neutral aqueous liquid the said photo-exposed silver halide emulsion layer and/or wetting with said liquid a development nuclei containing layer of an image-receiving material as defined hereinafter and contacting said materials thereby bringing said layers into waterpermeable relationship with each other, and (III) separating the contacted materials after formation in the image-receiving material of a silver image, wherein said image-receiving material contains in co-operable relationship : (i) physical development nuclei, (ii) a silver halide solvent being a silver complexing agent or precursor thereof, (iii) a watersoluble sulfite or sulfite precursor, and (iv) a mixture of sodium and/or potassium tetraborate and a sodium and/or potassium salt of an organic mono- or polycarboxylic acid, wherein the acid is characterized by at least one dissociation step corresponding at 25 DEG C with a dissociation constant smaller than 10<-2.5>, in other words a pKa value of at least 2.5. e</p> |
