SILVER HALIDE PHOTOGRAPHIC MATERIAL Russian patent published in 1997 - IPC

FIELD: photographic industry. SUBSTANCE: material consists of base, one of sides of which supports successively disposed adhesion gelatin underlayer, photosensitive emulsion layer composed of AgBr/AgI emulsion containing spectral sensitizers of carbocyaninebetaine series, and gelatin protective layer. The other side of base bears antihalation antistatic counterlayer or antistatic lacquer layer. According to invention, between adhesion and photosensitive emulsion layers, gelatin ground layer is additionally disposed including (i) spectral sensitizer: triethylamine salt of 3,3'-di-γ-sulfopropyl-9-ethyl-4,5-benzo- 4',5'(thieno-3",2")Чthiocarbocyaninebetaine or salt of 3,3'- diethylthiazolinocarbocyanine and 3,3'-di-γ-sulfopropyl-9-ethyl- 4,5,4', 5'-dibenzothiacarbocyaninebetaine and (ii) spectral sensitizer: salt of 1,1'-diethyl-2,2'-quinocyanine and 3,3'-di-γ-sulfopropyl-9- ethyl-5,5'-dimetoxythiacarbocyaninebetaine, the summary concentration of (i) and (ii) dyes being (0.39-2.62)·10^-4 M and their molar ratio 1:(0.3-7.4). EFFECT: improved structure of material. 2 tbl