Process for the reoxidation of photographic bleaching and bleach-fix baths

Abstract

Abstract PHOTOGRAPHIC BLEACHING AND BLEACH-FIXING BATHS ARE REOXIDIZED BY SPRAYING THEM THROUGH A NOZZLE IN THE PRESENCE OF OXYGEN INTO AN OXIDATION CHAMBER. THE OXYGEN IS PROVIDED EITHER IN THE FORM OF AIR OR PURE OXYGEN, WHICH MAY BE INTERMIXED AT THE NOZZLE OR CONTACTED IN THE CHAMBER ATMOSPHERE. THE GASES AND LIQUID CONSTITUENTS OF THE SPRAYED BATHS ARE SEPARATED BY DIRECTING THEM THROUGH BAFFLED PASSAGEWAYS OR BUBBLING THROUGH A LIQUID. THE BAFFLED PASSAGEWAYS MAY BE DISPOSED CONCENTRICALLY ABOUT THE OXIDATION CHAMBER OR IN ITS BOTTOM. THE NOZZLES FOR LIQUID AND GAS ATOMIZATION MAY BE DIRECTED IN THE SAME OR OPPOSITE DIRECTIONS OR IN SEPARATE OR COMBINED NOZZLES. A LIQUID FOR BUBBLING SEPARATION MAY BE CONCENTRICALLY DISPOSED IN A JACKET ABOUT THE BOTTOM OF THE OXIDATION CHAMBER INTO WHICH THE LIQUID AND GASEOUS CONSTITUENTS ARE FORCED BY EXCESS PRESSURE. THE LIQUID IS DISCHARGED FROM AN OVERFLOW NEAR THE TOP OF THE JACKET AND THE GASEOUS CONSTITUENTS ARE SEPARATED BY BUBBLING THROUGH THE JACKET. REOXIDATION MAY BE PERFORMED DIRECTLY WITHIN THE BLEACH OR BLEACH-FIXING CHAMBER AND MAY BE PERFORMED AT THE SAME TIME AS THE BATHS ARE SPRAYED UPON THE SILVER HALIDE EMULSION LAYERS OF AN EXPOSED PHOTOGRAPHIC MATERIAL. SILVER SALTS ARE REMOVED FROM THE BATHS BEFORE THEY ARE SPRAYED, AND THE PHOTOGRAPHIC MATERIAL MAY FORM PART OF THE WALL OF THE CHAMBER. D R A W I N G

Inventors

• 👤 G Brus
• 👤 E Schon
• 👤 K Schranz
• 👤 W Hunicke
• 👤 J Busch
• 👤 H Bruck

Bibliographic Details