Silver halide photographic material and process for the preparation thereof
AssigneeFuji Photo Film Co., Ltd.
InventorsHiroyuki Mifune, Shigeharu Urabe
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Abstract
A silver halide photographic material is disclosed which comprises at least one silver halide emulsion layer on a support, wherein light-sensitive silver halide grains in the silver halide emulsion layer or layers are obtained by charging previously prepared silver halide particles having a fine size into a reaction vessel which allows nucleation and/or crystallization of the light-sensitive silver halide grains so that nucleation and/or crystallization are effected in the reaction vessel, and the light-sensitive silver halide grains are subjected to chemical ripening in the presence of a silver halide solvent. A process for the preparation of the silver halide photographic material is also disclosed.
Claims14
A silver halide photographic material comprising at least one silver halide emulsion layer on a support, wherein light-sensitive silver halide grains in said at least one silver halide emulsion layer are obtained by charging previously prepared silver halide particles having a fine grain size into a reaction vessel which allows at least one of nucleation and crystallization of said light-sensitive silver halide grains so that at least one of nucleation and crystallization is effected in said reaction vessel, and said light-sensitive silver halide grains are subjected to chemical ripening in the presence of a silver halide solvent, wherein said silver halide particles having a fine grain size are formed by mixing an aqueous solution of a water-soluble silver salt and an aqueous solution of a water-soluble halide in a mixer provided outside said reaction vessel which allows at least one of nucleation and crystallization of light-sensitive silver halide grains, wherein an aqueous solution of protective colloid is charged into the mixer at a concentration of at least 2 wt % in at least one of the following ways:
- (a) singly,
- (b) in the aqueous solution of a water-soluble silver salt, and
- (c) in the aqueous solution of a water-soluble halide.
A process for the preparation of a silver halide photographic material comprising at least one silver halide emulsion layer on a support, wherein said process comprises obtaining light-sensitive silver halide grains in said at least one silver halide emulsion layer by charging previously prepared silver halide particles having a fine grain size into a reaction vessel which allows at least one of nucleation and crystallization of said light-sensitive silver halide grains so that at least one of nucleation and crystallization is effected in said reaction vessel, and subjecting said light-sensitive silver halide grains to chemical ripening in the presence of a silver halide solvent, wherein said process further comprises forming said silver halide particles having a fine grain size by mixing an aqueous solution of a water-soluble silver salt and an aqueous solution of a water-soluble halide in a mixer provided outside said reaction vessel which allows at least one of nucleation and crystallization of light-sensitive silver halide grains, wherein said process additionally comprises charging an aqueous solution of protective colloid into the mixer at a concentration of at least 2 wt % in at least one of the following ways:
- (a) singly,
- (b) in the aqueous solution of a water-soluble silver salt, and
- (c) in the aqueous solution of a water-soluble halide.
A process for the preparation of a silver halide photographic material as claimed in claim 14, wherein the said silver halide particles having a fine grain size are immediately supplied to said reaction vessel so that they are used for at least one of nucleation and crystallization of said light-sensitive silver halide grains.
Dependencies are inferred from the claim text.