| abstract |
SENSITIVITY IS INCREASED MARKEDLY WITHOUT ACCOMPANYING INCREASED FOG FORMATION BY SUPER-SENSITIZING A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A SENSITIZING CYANINE DYE WITH A QUATERNARY SALT OF IMIDAZOLE SHOWN BY THE GENERAL FORMULA: 1-R1,2-R,3-R2,4-Y2,5-Y1-IMIDAZOLIUM X(-)(N-1) OR 1-R1,2-R,3-((1-R3,2-R,4-Y2,5-Y1-IMIDAZOL-3-YL)-(CH2)M-),4- Y2,5-Y1-IMIDAZOLINIUM 2X(-) WHEREIN R IS H, AN ALKYL GROUP, OR A HYDROXYALKL GROUP, EACH OF R1 AND R2 IS AN ALKYL, ARALKYL, HYDROXYALKYL, ACETOXYALKYL, ARYL, OR ALKENYL GROUP, X IS AN ANION, EACH OF Y1 AND Y2 IS H, AN ALKYL GROUP OR A HALOGEN ATOM. |