Abstract: A reversal development processing method for black and white silver halide photographic light-sensitive materials which comprises bleaching an imagewise exposed black and white silver halide photographic light-sensitive material with a bleaching solution containing at least one oxidizing agent capable of forming a water-soluble silver salt when reacted with the silver images of said exposed light-sensitive material in the presence of at least one bleach accelerating agent selected from the compounds represented by the general formulae (I) to (VIII) described in the specification.

Abstract: A color photographic process is described for a silver halide photographic material having at least a silver halide emulsion layer containing a dye-forming coupler, comprising developing in a color developer solution containing components (1) an aromatic primary amino color developing agent, (2) a 1-aryl-3-pyrazolidone compound having two substituents at the 4-position, and (3) at least one compound selected from compounds represented by formulae (I) and (II): ##STR1## wherein X represents a hydrocarbon group having 1 to 6 carbon atoms; R represents a carboxylic acid group, a water-soluble carboxylic acid salt group, a water-soluble carboxylic acid ester group, or a water-soluble carboxylic acid amide group; m is 1 or 2; and n is 0 or 1; and then fixing by an acid hardening fix solution.

Abstract: A process for the recovery of silver from a fixing solution used in processing silver halide photographic light-sensitive materials wherein an electrolytic cell having a cathodic cell and an anodic cell separated by a diaphragm is used; silver is recovered from the used fixing solution in the cathodic cell and the anodic cell is filled with a fixing solution which has been used or not used in photographic processing, or an electrolyzed fixing solution.

Abstract: An electrolytic cell for recovering a metal from a solution has a diaphragm between a cathode and an anode. The diaphragm is supported by a support frame composed of a number of support columns. At least two of the support columns are made hollow in structure. A solution supply port is provided in at least one of the hollow support columns and a solution take-out port is provided in each of the remaining hollow support columns.

Abstract: A method for processing a photographic light-sensitive material, which comprises developing an exposed silver halide photographic material in a developer containing a developing agent and a dialdehyde compound, and fixing the material in a fixing solution containing (1) a thiosulfate, (2) a water-soluble aluminum salt and (3) at least 0.005 mol/liter of tartaric acid, or a salt thereof, citric acid or a salt thereof, or a mixture thereof.