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US 5,387,483 AGranted
Processing of lithographic printing material and developer used therein
AssigneeFuji Photo Film Co., Ltd.
InventorYoshihiro Takagi
Life of this patent
Estimating the term…
Abstract
Lithographic printing material is processed with a developer at pH 10.0 to 11.8 containing 30 to 80 gram/liter of hydroquinone in accordance with a diffusion transfer process. The developer is capable and stable. The resulting transfer silver image has improved printing endurance and ink receptivity.
Claims4
A method for processing a lithographic printing material which has been imagewise exposed to light with a developer in accordance with a diffusion transfer process, said lithographic printing material comprising at least a silver halide emulsion layer and a physical development nucleus layer on a support
- said developer containing a silver halide solvent and at least 30 gram/liter of hydroquinone and having a pH value of up to 11.8.
Dependencies are inferred from the claim text.