Light-sensitive silver halide photographic emulsion for microfilm use

Abstract

Abstract SILVER HALIDE PHOTOGRAPHIC EMULSIONS FOR MICROFILM USE ARE SENSITIZED BY INCORPORATING THEREINTO, TWO OR MORE DYES OF THE FORMULA (I) AND ONE COMPOUND OF THE FORMULA (II) IN COMBINATIN: (-N(-R1)-Z-)>C=CH-C(-R2)=CH-C<(-Z-N(+)(-R3)=) (X(-))(R-1) 2-((3-R4,5-Y1,6-Y2-2,3-DIHYDROBENZOXAZOL-2-YLIDENE=CH-CH= CH-),1-R5,3-R6,(CL)N-BENZOXAZOLIUM (X(-))(M-1) WHEREIN R1, R3, R4 AND R6 ARE INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL GROUP, A CARBOXYALKYL GROUP OR A SULFOALKYL GROUP, WITH THE PROVISO THAT AT LEAST ONE OF R1, R3, R4 AND R6 IS A CARBOXYALKYL, SULFOALKYL OR SULFALKOXYALKYL GROUP; R2 IS HYDROGEN ATOM OR A LOWER ALKYL GROUP; R5 IS A LOWER ALKYL GROUP; Y IS HYDROGEN ATOM, CHLORINE ATOM, A LOWER ALKYL GROUP OR A LOWER ALKOXY GROUP; Y2 IS HYDROGEN ATOM OR A LOWER ALKYL GROUP WITH THE PROVISO THAT WHEN Y1 IS CHLORINE, Y2 IS METHYL; Z IS A GROUP CAPABLE OF FORMING, TOGETHER WITH THE ADJACENT NITROGEN AND CARBON ATOMS, A HETEROCYCLIC RING; X IS AN ANION; AND 1, N AND M ARE EACH 1 OR 2.

Inventors

• 👤 Shui Sato
• 👤 Kaiichiro Sakazume
• 👤 Tsuneo Suga

Bibliographic Details