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Dye-Bleaching Bath for the Silver-Dye-Bleach Process
Dye-Bleaching Bath for the Silver-Dye-Bleach Process
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机译:银染漂染工艺的印染浴
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1,176,530. Photographic silver-dye-bleach bath. AGFA GEVAERT A.G. Sept. 21, 1967 [Sept.21, 1966], No.43049/67. Heading G2C. An aqueous dye-bleach bath for the photographic silver-dye-bleach colour process contains 45 to 125 ml. of quinoline and 5 to 40 ml. of quinaldine per litre and possesses a pH of below 2 and an electro-chemical silver potential with reference to a saturated calomel electrode that is more negative than -300mV. The bath may contain as acids sulphuric, hydrochloric, hydrobromic, phosphoric, nitric, toluene sulphonic and naphthylene disulphonic acids and alkali-metal halides such as potassium iodide and complexing agents such as thiosemicarbazide and thiourea may also be present.
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