PRODUCTION METHOD FOR PHOTOGRAPHIC EMULSION BASED ON SILVER-HALIDE LAMINATE MICROCRYSTALS WITH EPITAXIAL NANOSTRUCTURES Russian patent published in 2009 - IPC G03C1/05 G03C1/35 B82B3/00 

FIELD: chemistry; photographic industry.

SUBSTANCE: invention relates to photographic industry, particularly to technology of silver-halide photographic emulsion preparation. According to the invention the production of photographic emulsion based on silver-halide laminate microcrystals (LMC) with epitaxial nanostructures is started from preparing nuclear emulsion from solution of AgNO₃ and KBr. Thereafter, substrate LMC AgBr are derived by adding solution of AgNO₃ and KBr in the nuclear emulsion. Annular epitaxial nanostructures containing AgBr/AgCl are formed on the produced LMC AgBr by adding Kl and KCl solutions in reaction mixture. At the final stage, firstly, epitaxial nanostructures are converted by adding solution of KBr into reaction mixture, thereafter the second conversion is carried out by adding small particle emulsion prepared separately and containing AgBr_0.98l_0.02-AgBr_0.90I_0.10.

EFFECT: simplification of photographic emulsion preparation with optimal photographic characteristics of light sensitivity, as well as microcrystal dispersion characteristics used in industrially produced photomaterials.

1 cl, 1 tbl, 14 ex