Silver halide photographic material
AssigneeFuji Photo Film Co., Ltd.
InventorShigeru Ohno
Life of this patent
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Abstract
Disclosed is a silver halide photographic material having a hydrophilic colloid layer which contains a dispersion of solid fine grains of an oxonole dye which does not have any dissociating proton-containing substituent or salt thereof capable of dissolving the dye during development, except the enolic proton constituting a part of the chromophoric group of the dye in the compound. In the photographic material, the oxonole dye colors only the specific hydrophilic layer without having any bad effect on the photographic properties of the material. The dye may be rapidly decolored by development of the material.
Claims17
A silver halide photographic element comprising a support having thereon a hydrophilic colloid layer which contains a dispersion of solid fine grains having a mean grain size from 0.005 .mu.m to 10 .mu.m of a compound of formula (I) which is present in the amount of 0.5 to 1,000 mg/m.sup.2 :
- A.sub.1 =(L.sub.1 -L.sub.2).sub.m =L.sub.3 -(L.sub.4 =L.sub.5).sub.n -A.sub.2 (I)
- wherein A.sub.1 and A.sub.2 each represents an acidic nucleus necessary for forming an oxonole dye, excepting the case where A.sub.1 and A.sub.2 are both 2-pyrazolin-5-one nuclei, the case where they are both barbituric acid nuclei, and the case where they are both 2,6(1H,3H)-pyridinedione nuclei, and wherein at least one of the acidic nuclei represented by A.sub.1 and A.sub.2 is selected from the group consisting of a pyrazolo[3,4-b]pyridine-3,6-dione nucleus, 2(5H)-furanone nucleus, ##STR18## wherein R.sub.5, R.sub.6 and R.sub.7 each represents a hydrogen atom or a substituent;
- provided that R.sub.5 and R.sub.6 may be bonded to each other to form a 5-membered or 6-membered ring;
- L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5 each represents a methine group;
- and m and n each represents 0, 1 or 2;
- provided that the compound does not have any dissociating proton-containing substituent or salt thereof capable of dissolving the compound during development, except for the enolic proton constituting a part of the chromophoric group of an oxonole dye.
Dependencies are inferred from the claim text.