Silver halide photosensitive material containing an infrared absorption dye
AssigneeFuji Photo Film Co., Ltd.
InventorsShigeru Ohno, Yuji Mihara, Keiichi Adachi
Life of this patent
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Abstract
A silver halide photosensitive material having a hydrophilic colloid layer containing a specific water-soluble dye including at least three acid radicals. The water-soluble dye in the hydrophilic colloid layer absorbs light in the infrared region but does not adversely affect the photographic characterisitics of the photographic emulsion and is discolored upon photographic processing.
Claims18
A silver halide photosensitive material which comprises a support, at least one silver halide photosensitive layer and a hydrophilic colloid layer wherein at least one of said layers contains 10.sup.-3 g/m.sup.2 to 1 g/m.sup.2 of at least one dye represented by formula (I):
- ##STR15## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6, which may be the same or different, each represents a substituted or unsubstituted alkyl group, and Z.sup.1 and Z.sup.2 each represents a group of non-metallic atoms necessary for the formation of a substituted or unsubstituted benzo-condensed ring or naptho-condensed ring, with a proviso that R.sub.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, Z.sup.1 and Z.sup.2 represent those groups which permit the dye molecule to have at least three acid radicals;
- L represents a substituted or unsubstituted methine group;
- X represents an anion;
- and n represents 1 or 2, n being 1 when the dye forms an inner salt.
A silver halide photosensitive material which comprises a support, at least one silver halide photosensitive layer and a hydrophilic colloid layer wherein at least one of said layers contains an effective amount of at least one dye for improving the sharpness of the image quality represented by formula (I):
- ##STR16## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6, which may be the same or different, each represents a substituted or unsubstituted alkyl group, and Z.sup.1 and Z.sup.2 each represents a group of non-metallic atoms necessary for the formation of a substituted or unsubstituted benzo-condensed ring or naphtho-condensed ring, with a proviso that R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, Z.sup.1 and Z.sup.2 represent those groups which permit the dye molecule to have at least three acid radicals;
- L represents a substituted or unsubstituted methine group;
- X represents an anion;
- and n represents 1 or 2, n being 1 when the dye forms an inner salt.
Dependencies are inferred from the claim text.