The Use of Bleach-Fixing Baths in Color Motion-Picture Print Film Processing — Part II: Practical Application

Abstract

The principles and main properties of modern bleach-fixing baths were outlined in an earlier paper by the authors (Jour. SMPTE, 82: 542–547, July 1973). The present paper gives the results from a long-term performance of the bleach-fixing baths with Gevacolor Print Films. Special attention was given to the desilvering and rejuvenation of the used blix, based on metallic replacement (steel-wool cartridges). In order to increase the efficiency of the cartridges and to avoid an excessive build-up of iron EDTA in the bleach-fixing bath, the technique of prereduction is applied. After passage through the cell, the oxidizing properties of the bleach-fix can be restored by aerating the solution vigorously.