Method of forming photographic line and half-tone images
AssigneeFuji Photo Film Co., Ltd.
InventorsMitsunori Sugiyama, Shoji Ishiguro, Nobuo Sugiyama, Yoo Iijima, Eiichi Okutsu, Haruhiko Iwano, Katsumi Hosoya, Hikoharu Hara
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Abstract
High-contrast photographic images are obtained by developing with a developer containing at least one dihydroxybenzene and sulfite ion and then treating with a solution of an oxidizing agent.
Claims18
A method for forming a high-contrast silver halide photographic image, which comprises developing an exposed high-contrast silver halide photographic element containing at least 50 mol percent silver chloride with a developer containing:
- (1) at least one dihydroxybenzene compound, and
- (2) a sulfite ion, said sulfite ion being present in a concentration of 5 grams or less per liter of said developer, fixing said photographic element after developing and before or during fixation treating said developed photographic element with a solution containing a halide and an oxidizing agent selected from the group consisting of a bichromate, a ferricyanide, a persulfate and a perchlorate, or a solution containing a ferric ion chelate complex salt oxidizing agent.
A method for forming a high-contrast silver halide photographic image which comprises developing an exposed high-contrast silver halide photographic element containing at least 50 mol percent silver chloride with a lithographic developer containing:
- (1) hydroquinone,
- (2) a sulfite ion, said sulfite ion being present in a concentration of 5 grams or less per liter of said developer and
- (3) a sulfite ion buffer,
- subsequently treating said photographic element with an oxidizing bath containing an oxidizing agent selected from the group consisting of a bichromate, a ferricyanide, a persulfate and a perchlorate and a halide and then
- fixing said photographic element.
A method for forming a high-contrast silver halide photographic image which comprises developing an exposed high-contrast silver halide photographic element containing at least 50 mol percent of silver chloride with a lithographic developer containing:
- (1) hydroquinone,
- (2) a sulfite ion, said sulfite ion being present in an amount of 5 grams or less per liter of developer, and
- (3) a sulfite ion buffer, and
- subsequently treating said photographic element with a fixing solution containing a fixing agent, and an oxidizing agent which consists of a chelate complex salt of a ferric ion with an organic acid.
A two-step method for forming a high-contrast silverhalide photographic image, which comprises developing an exposed high contrast silver halide element with an infectious developer containing hydroquinone and sulfite ion and thereafter fixing said developed element with a solution containing a ferric ion chelate complex salt oxidizing agent annd a thiosulfate fixing agent.
Dependencies are inferred from the claim text.