Black and white graphic arts film
AssigneeEastman Kodak Company
InventorJulie Baker
Life of this patent
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Abstract
A black and white graphic arts film comprising a support having thereon at least one emulsion layer, said emulsion layer comprising: a trinuclear merocyanine spectral sensitising dye; 2-methylthio-4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene (SMe-TAI); and a photosensitive silver halide.
Claims16
A black and white graphic arts film comprising a support having thereon at least one emulsion layer, said emulsion layer comprising:
- (d) a trinuclear merocyanine spectral sensitising dye;
- (e) 2-methylthio-4-hydroxy-6-methyl-1,3,3a,7-tetraazaindene (SMe-TAI);
- and
- (f) a photosensitive silver halide.
A black and white graphic arts film comprising a support having thereon at least one emulsion layer, said emulsion layer comprising:
- (i) SMe-TAI;
- (ii) a red spectral sensitising dye;
- (v) at least one anti-foggant;
- and
- (vi) a photosensitive silver halide.
A method for modulating the relative HN and LD speeds of a black and white graphic arts photographic film comprising combining SMe-TAI in a concentration of from 0.05 to 1.5 g/Ag mole and a trinuclear merocyanine dye in a concentration of from 0.1 to 1.0 g/Ag mole in a silver halide emulsion layer of said film, the concentration of SMe-TAI in said emulsion layer determining the extent of modulation of the relative HN and LD speeds.
A method for controlling emulsion melt drift in a photographic silver halide emulsion melt prior to coating said emulsion melt on a support for a photographic film, comprising combining SMe-TAI in a concentration of from 0.05 to 0.5 g/Ag mole and a trinuclear merocyanine dye in a concentration of from 0.1 to 1.0 g/Ag mole in said emulsion melt, the concentration of SMe-TAI in said emulsion melt determining the extent to which the emulsion melt drift is controlled.
Dependencies are inferred from the claim text.