Iron in photographic gelation-II effective elimination of iron impurity in gelatin

摘要

Comparing some previous ion exchange methods, ion exchange resin with larger pores structure is better than gel ion exchange resin for elimination iron impurity in gelatin. But it is possible to dramatically increase the efficiency to remove iron by means of changing chemical form of iron as a result of changing in the iron valence even with gel resin. Consequently, a novel method to eliminate iron impunty for prepartion of photographic gelatin is developed.