METHOD OF PRODUCING SILVERLESS IMAGE Russian patent published in 1998 - IPC

FIELD: photographic industry. SUBSTANCE: method of preparing silverless photographic image by treating cellulose carrier with tin(II) compound-solvent composition, drying, exposition, and subsequent treatment by developing solution is distinguished by that, in order to simplify technology and to decrease image fog, in cellulose carrier treatment composition, tin thiocyanide is used as tin(II) salt and water as solvent. In this case, cellulose carrier is treated until tin thiocyanide content in cellulose carrier reaches 2.5 to 16.0 weight parts per 100 weight parts of cellulose, and developing solution employs alkali solution of sodium plumbite with concentration 0.0005 to 0.1 mol.l at pH 12.0- 13.5. EFFECT: simplified preparation technology.