Developer compositions for silver halide photographic materials

Claim 2

A developer composition for silver halide photographic materials comprising hydroquinone or a substituted hydroquinone, an alkali metal sulfite, an organic antifogging agent and inorganic alkali agents, characterized in that said developer composition comprises an alkanolamine and a sequestering agent selected in the group of diethylenetetramine pentacetic acid, 1,3-diamino-2-propanoltetracetic acid and 1-hydroxyethylidene-1,1'-diphosphonic acid.

Claim 3

The developer composition for silver halide photographic materials according to claim 1 further comprising a compound selected in the group of polyphosphates, phosphoric acid, acetic acid, lactic acid and citric acid.

Claim 4

The developer composition for silver halide photographic materials according to claim 1 further comprising an auxiliary developing agent selected in the class of substituted pyrazolidone and p-aminophenol compounds.

Claim 5

The developer composition for silver halide photographic materials according to claim 1, in which the organic antifoggant agent is selected in the group of mixtures of 5-nitroindazole and benzimidazole nitrate, 5-nitrobenzotriazole and l-phenyl-5-mercaptotetrazole, and benzotriazole and I-phenyl-5-mercaptotetrazole.

Claim 6

The developer composition for silver halide photographic materials according to claim 1, in which the alkanolamine is selected in the group of diethanolamine, triethanolamine, 2-benzylaminoethanol, 2-methylaminoethanol, 2-ethylaminoethanol and 2-isopropylamino- ethanol.

Claim 7

A developer composition for silver halide photographic materials comprising: (a) hydroquinone or a substituted hydroquinone in an amount of 10 to 30 grams per liter; (b) an auxiliary developing agent in an amount of 0.2 to 5 grams per liter; (c) an alkali metal sulfite in an amount of 20 to 50 grams per liter; (d) an alkanolamine in an amount of 5 to 20 grams per liter; (e) an organic antifoggant agent selected in the group of mixtures of 5-nitroindazole and benzimidazole nitrate, 5-nitrobenzotriazole and 1-phenyl-5-mercaptotetrazole and benzotriazole and 1-phenyl-5-mercaptotetrazole in an amount of 0.2 to 1.5 grams per liter; (f) a sequestering agent selected in the group of diethylenetetraminopentacetic acid, 1,3-diamino-2-propanoltetracetic acid and 1-hydroxyethylidene-1,1 1- diphosphonic acid in an amount of 10 to 30 grams per liter; (g) a compound selected in the group of polyphosphates, phosphoric acid, acetic acid, lactic acid and citric acid in an amount of 15 to 50 grams per liter; (h) inorganic alkali agents sufficient to provide a pH of at least 10; and (i) water sufficient to make up 1 liter.

Claim 8

A developer composition for silver halide photographic materials comprising: (a) hydroquinone or a substituted hydroquinone in an amount of 10 to 30 grams per liter; (b) an auxiliary developing agent in an amount of 0.2 to 5 grams per liter; (c) an alkali metal sulfite in an amount of 20 to 50 grams per liter; (d) an alkanolamine in an amount of 5 to 20 grams per liter; (e) an organic antifoggant agent selected in the group of mixtures of 5-nitroindazole and benzimidazole nitrate, 5-nitrobenzotriazole and 1-phenyl-5-mercaptotetrazole and benzotriazole and 1-phenyl-5-mercaptotetrazole in an amount of 0.2 to 1.5 grams per liter; (f) a sequestering agent selected in the group of diethylenetetraminopentacetic acid, 1,3-diamino-2-propanoltetracetic acid and 1-hydroxyethylidene-1,1 1- diphosphonic acid in an amount of 10 to 30 grams per liter; (g) a compound selected in the group of polyphosphates, phosphoric acid, acetic acid, lactic acid and citric acid in an amount of 15 to 50 grams per liter; (h) inorganic alkali agents sufficient to provide a pH of at least 10; and (i) water sufficient to make up 1 liter.

Claim 9

A concentrated developer composition for silver halide photographic materials, to be diluted with water to form a ready-for-use developer composition, comprising hydroquinone or a substituted hydroquinone, an alkali metal sulfite and inorganic alkali agents, characterized in that it contains an alkanolamine, a sequestering agent selected in the group of diethylenetetraminopentacetic acid, 1,3-diamino-2-pro- panoltetracetic acid and 1-hydroxyethyliden-1,1'-diphosphonic acid, and a mixture of benzotriazole and I-phenyl-5-mercaptotetrazole antifogging agents.

Claim 10

A concentrated developer composition for silver halide photographic materials, to be diluted with water to form a ready-for-use developer composition, comprising hydroquinone or a substituted hydroquinone, an alkali metal sulfite and inorganic alkali agents, characterized in that it contains an alkanolamine, a sequestering agent selected in the group of diethylenetetraminopentacetic acid, 1,3-diamino-2-pro- panoltetracetic acid and 1-hydroxyethyliden-1,1'-diphosphonic acid, and a mixture of benzotriazole and I-phenyl-5-mercaptotetrazole antifogging agents.

Claim 11

The concentrated developer composition for silver halide photographic materials according to claim 7 which comprises a compound selected in the group of polyphosphates, phosphoric acid, acetic acid, lactic acid and citric acid.

Claim 12

The concentrated developer composition for silver halide photographic materials according to claim 7 which comprises diethanolamine as alkanolamine.

Claim 13

The concentrated developer composition for silver halide photographic materials according to claim 7 which comprises an auxiliary developing agent selected in the class of substituted pyrazolidone and p-aminophenol compounds.

Claim 14

A concentrated developer composition for silver halide photographic materials, to be diluted with water to form a ready-for-use developer composition, comprising: (a) hydroquinone or a substituted hydroquinone in an amount of 40 to 120 grams per liter; (b) a auxiliary developing agent in an amount of 0.5 to 20 grams per liter; (c) an alkali metal sulfite in an amount of 80 to 200 grams per liter; (d) an alkanolamine in an amount of 20 to 120 grams per liter; (e) a mixture of benzotriazole and 1-phenyl-5-mercaptotetrazole antifogging agents in an amount of 0.8 to 6 grams per liter; (f) a sequestering agent selected in the group of diethylenetetraminepentacetic acid, 1,3-diamino-2-propanoltetracetic acid and 1-hydroxyethylidene-1,1 1- diphosphonic acid in an amount of 20 to 150 grams per liter; (g) a compound selected in the group of polyphosphates, phosphoric acid, acetic acid, lactic acid and citric acid in an amount of 50 to 150 grams per liter; (h) inorganic alkali agents sufficient to provide a p h of at least 11; and (i) water sufficient to make up 1 liter.

Claim 15

A concentrated developer composition for silver halide photographic materials, to be diluted with water to form a ready-for-use developer composition, comprising: (a) hydroquinone or a substituted hydroquinone in an amount of 40 to 120 grams per liter; (b) a auxiliary developing agent in an amount of 0.5 to 20 grams per liter; (c) an alkali metal sulfite in an amount of 80 to 200 grams per liter; (d) an alkanolamine in an amount of 20 to 120 grams per liter; (e) a mixture of benzotriazole and 1-phenyl-5-mercaptotetrazole antifogging agents in an amount of 0.8 to 6 grams per liter; (f) a sequestering agent selected in the group of diethylenetetraminepentacetic acid, 1,3-diamino-2-propanoltetracetic acid and 1-hydroxyethylidene-1,1 1- diphosphonic acid in an amount of 20 to 150 grams per liter; (g) a compound selected in the group of polyphosphates, phosphoric acid, acetic acid, lactic acid and citric acid in an amount of 50 to 150 grams per liter; (h) inorganic alkali agents sufficient to provide a p h of at least 11; and (i) water sufficient to make up 1 liter.