EP0219010A2 — Silver halide photographic materials

Claim 1

Independent Claim 120 words

A silver halide photographic material for a bright room comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more an an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the γ value of the silver halide photographic material being at least 10.

Claim 2

Dependent Claim 120 words

A silver halide photographic material for a bright room comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more an an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the γ value of the silver halide photographic material being at least 10.

Claim 3

Dependent Claim 48 words

The silver halide photographic material for a bright room as claimed in claim l, wherein the silver chloride grains or silver chlorobromide grain in the silver halide emulsion layer contain a rhodium salt in an amount of 1 × l0⁻⁷ to 1 × l0⁻⁴ per mol of silver.

Claim 4

Dependent Claim 36 words

The silver halide photographic material for a bright room as claimed in claim l, wherein the yellow dye is selected from the group consisting of oxonol dyes, hemioxonol dyes, merocyanine dyes, cyanine dyes and azo dyes.

Claim 5

Dependent Claim 51 words

The silver halide photographic material for a bright room as claimed in claim l, wherein the ultraviolet absorbent is selected from the group consisting of aryl group-substituted benzotriazole compounds, 4-thiazolidone compounds, benzophenone compounds, cinnamic acid ester compounds, benzophenone compounds, cinnamic acid ester compounds, butadiene compounds, benzoxazole compound and ultraviolet absorptive polymers.

Claim 6

Dependent Claim 29 words

The silver halide photographic material for a bright room as claimed in claim l, wherein the yellow dye is used in an amount of 10⁻³ g/m² to l g/m².

Claim 7

Dependent Claim 29 words

The silver halide photographic material for a bright room as claimed in claim l, wherein the ultraviolet absorbent is used in an amount of 10⁻³ g/m² to 1 g/m².

Claim 8

Dependent Claim 31 words

The silver halide photographic material for a bright room as claimed in claim l, wherein the silver halide emulsion layer, another hydrophilic colloid layer or both of them contain hydrazine derivatives.

Claim 9

Dependent Claim 137 words

The silver halide photographic material for a bright room as claimed in claim 7, wherein the hydrazine derivatives are selected from compounds represented by formula (III-1) or (III-2) wherein R₁ represents an aliphatic or aromatic group or unsaturated heterocyclic group; R₂ represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an N-substituted or unsubstituted iminomethylene group; Acyl is an acyl group; Ar is an aryl group, and R¹ʼ is a hydrogen atom or a sulfinic acid radical substituent and R²ʼ is a sulfinic acid radical substituent when R¹ʼ is hydrogen atom and hydrogen atom when R¹ʼ is a sulfinic acid radical.

Claim 10

Dependent Claim 31 words

The silver halide photographic material for a bright room as claimed in Claim l, wherein the silver halide emulsion layer, another hydrophilic colloid layer or both of them contain tetrazeolium compounds.

Claim 11

Dependent Claim 161 words

The silver halide photographic material for a bright room as claimed in claim l, wherein the tetrazolium compound is selected from the compounds represented by formulae IV), V) and VI) wherein R₁, R₃, R₄, R₅, R₈, R₉, R₁₀ and R₁₁ each represents an allyl group, a pheny group, a naphthyl group or a heterocyclic group or a group forming a metal chelate or a complex; R₂, R₆ and R₇ each represents an allyl group, a phenyl group, a naphthyl group, a heterocyclic group, an alkyl group, a hydroxy group, a carboxy group or a salt thereof, a carboxyalkyl group, a mercapto group, a nitro group or a hydrogen atom; D represents a divalent aromatic group; E represents an alkylene group, an arylene group, or an aralkylene group; and n represents l or 2, n being l when the compound of each formula forms an intermolecular salt, and X represents an anion (preferab1y a chloride ion, a bromide ion, perchlorate ion, etc.},

Claim 12

Dependent Claim 127 words

A process for producing a silver halide photographic material for a bright room comprising developing a silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer(s) or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more, an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than l/2 thereof in the absence of the ultraviolet absorbent and hydrazine compounds, with a developer of pH 10.5 - 12.3.

Claim 13

Dependent Claim 127 words

A process for producing a silver halide photographic material for a bright room comprising developing a silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer(s) or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more, an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than l/2 thereof in the absence of the ultraviolet absorbent and hydrazine compounds, with a developer of pH 10.5 - 12.3.

Claim 14

Dependent Claim 127 words

A process for producing a silver halide photographic material for a bright room comprising developing a silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer(s) or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more, an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent and tetrazolium compounds, with a developer of pH 9 to 12.

Claim 15

Dependent Claim 127 words

A process for producing a silver halide photographic material for a bright room comprising developing a silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol% silver chloride, at least one of said silver halide emulsion layer(s) or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more, an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent and tetrazolium compounds, with a developer of pH 9 to 12.

Silver halide photographic materials

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