Detail of "4569-82-8"

Reference

Speed-increasing adjuvants for silver halide emulsions

Speed-increasing adjuvants for silver halide emulsions.Some chemicals with cas registry numbers like 4569-82-8 and 13084-21-4 are also used. Overman, Joseph D. (du Pont de Nemours, E. I., and Co. , USA). U.S. US 4396711 A 2 Aug 1983, 6 pp. (English). (United States of America). CODEN: USXXAM. CLASS: IC: G03C001-28. NCL: 430600000. APPLICATION: US 82-363378 29 Mar 1982. DOCUMENT TYPE: Patent CA Section: 74 (Radiation Chemistry, Photochemistry, and Photographic and Other Reprographic Processes) Thiazolidine, its derivs. having the general formulas I and II (R = C1-4 alkyl; R1 = Ph, p-MeOC6H4, p-ClC6H4, p-NO2C6H4, 3,4-Cl2C6H3, o-NO2C6H4), their HCl salts, N-(2-mercaptoethyl)-2-pyrrolidone, and HSCH2CH2NH2 are added to Ag halide photog. emulsions to increase their speed by 340% with no increase in emulsion fog. With the use of these compds., photog. emulsions with low Ag halide contents are thus possible. Thus, III was added to a gelatin-Ag(Br,I) emulsion (AgBr 98 mol %) at 0.0033 g/mol AgBrI, coated on a poly(ethylene terephthalate) support at 80 mg AgBr/dm2, exposed through a ?2 step wedge for 10-2 s on a Mark 6 sensitometer, and developed for 3 min in a std. x-ray developer (phenidone-hydroquinone) to give a relative speed of 141, a contrast of 1.3, and a fog of 0.05 vs. 100, 1.3, and 0.03, resp., for a III-free control. .