STUDY ON CHEMICAL FORMS OF IRON IN PHOTOGRAPHIC GELATIN USED IN COLOR FILM MAKING

doi:10.7517/j.issn.1674-0475.1992.02.159

Imaging Science and Photochemistry ›› 1992, Vol. 10 ›› Issue (2): 159-164.DOI: 10.7517/j.issn.1674-0475.1992.02.159

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STUDY ON CHEMICAL FORMS OF IRON IN PHOTOGRAPHIC GELATIN USED IN COLOR FILM MAKING

YUE JUN¹, HUANG BI-XIA¹, XIONG FANG¹, MENG DONG-FANG¹, AI JING-YUAN¹, LIN SHU-QIN¹, CHEN SHU-YU¹, YUE AI-BING²

1. University of Science and Technology of China, Hefei 230026, P.R. China;
2. Department of Chemistry, Sichuan University, Chengdu 610064, P.R. China

Received:1990-11-23 Revised:1991-10-04 Online:1992-05-20 Published:1992-05-20

Abstract

Abstract: Chemical forms of iron in photographic gelatin used in color film making were studied by means of gel filtration-atomic absorption spectrum method. It is shown that most of the iron in photographic gelatin coordinate with protein to form stable large molecular compounds and a litter one is small molecular. The trace inorganic iron salt added in the gelatin exists as protein-free iron form only. The foreign iron pollution, therefore, should be paid special attention when iron content in photographic gelatin is very low. Both total iron content and iron chemical form in photographic gelatin should be considered in photographic emulsion making.

Key words: photographic gelatin, iron, chemical form

YUE JUN, HUANG BI-XIA, XIONG FANG, MENG DONG-FANG, AI JING-YUAN, LIN SHU-QIN, CHEN SHU-YU, YUE AI-BING. STUDY ON CHEMICAL FORMS OF IRON IN PHOTOGRAPHIC GELATIN USED IN COLOR FILM MAKING[J]. Imaging Science and Photochemistry, 1992, 10(2): 159-164.

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STUDY ON CHEMICAL FORMS OF IRON IN PHOTOGRAPHIC GELATIN USED IN COLOR FILM MAKING

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