The Use of Bleach-Fixing Baths in Color Motion-Picture Film Processing
After a short historical survey the principles and general properties of the modern bleach-fixing bath are outlined. The main ingredients are the ferri-complex of ethylene diamine-tetraacetic acid (EDTA) and hypo or ammonium thiosulfate. The EDTA bleach-fixing bath was introduced in the early 1950s by Agfa and Gevaert for the processing of color paper. In order to meet the ever-increasing demands for simpler, faster and cleaner processes, the application of the EDTA bleach-fixing bath in the processing of motion-picture color film, particularly the Gevacolor Print Film, has been examined recently. It has been found that with this bath these goals can readily be attained. The proposed shortened processing seems worthwhile from the practical, economic and ecological points of view. Practical solutions are proposed concerning the desilvering and regeneration of the used bleach-fixing bath.
- Print ISSN
- 0361-4573
- Published
- 1973-07
- Content type
- Original Research
- DOI
- 10.5594/J08841