NDTnet 1998 Aug, Vol.3 No.8

Abstract

Silver levels in the rinsing water of radiographic films are becoming more important. These levels can be decreased substantially by electrolytic fixer desilvering or by the use of cascade fixation.
Electrolytic fixer desilvering is widely used, in particular in graphic applications. In processing radiographic films for NDT however, the fixer composition makes reliable fixer desilvering more difficult. The relation between the fixer composition and the use of electrolytic fixer desilvering is elucidated. It will be shown that when desilvering is used to decrease the silver levels in the rinsing water, the speed of desilvering is essential. By using state-of-the-art current control algorithms, it is possible to obtain a high speed of desilvering in relatively small electrolysis units. The ecological performance of these units is illustrated and the limitations of the technique are discussed.
The use of cascade fixation technology offers substantial ecological advantages. The critical parameters in the design of this technology, with respect to ecology, are discussed. The ecological performance is compared with electrolytic fixer desilvering technology. The strong points and the weak points of both technologies are compared.The implementation of these technologies into the Agfa product strategy is elucidated.

Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00

Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:

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