CONVERSION OF SILVER IMAGES ON SILVER-HALIDE PHOTOGRAPHIC MATERIALS INTO SILVERLESS ONES CONSISTING OF IRON(III) CHELATES WITH 8-SULFANYLQUINOLINE AND SOME OF ITS DERIVATIVES

The formation processes of silverless photographic images consisting o f iron(III) chelates with 8-sulfanylquinoline, 5-thiomethyl-8-sulfanyl quinoline and 5-bromo-8-sulfanylquinoline from an initial silver image on silver halide photographic layers by three-stage chemical processi ng (bleaching, fixing and toning) have been obtained and analysed. It has been determined that the redox process Fe-II-->Fe-III takes place here and, also, the image carriers are Fe(OH)(2), FeO(OH) and the corr esponding coordination compounds with an Fe-III ion-organic ligand rat io of 1:3.