Method and apparatus for recuperation of silver in the case of the photographic treatment or. Development

摘要

PURPOSE:To make it possible to recover the silver efficiently by a method wherein water within a silver recovery tank is automatically replaced corresponding to a treating amount of a photographic material to maintain the silver concn. within a tank to an almost constant level. CONSTITUTION:To a developing treatment tank 1, a fixing treatment tank 2 and a silver recovery tank 3, replenish solution supply pumps P1, P2 and P3 capable of setting a supply amount respectively and indivisually are connected and, moreover, city water is supplied into a washing tank 4B. In case of carrying out the treatment of a photographic material, the treating quantity is detected to supply a necessary treating solution for replenishing (city water to the silver recovery tank) to each treating tank. Thereby, the capacity of a treating solution for developing and fixing or the like is maintained constantly and a silver concn. within the silver recovery tank 3 can be maintained in a preferable range. The excessive treating solution or the water formed by replenishing are exhausted through an overflow pipe 5, 6, 7, 8. Silver recovery tank 3 may be arranged in plural numbers.