Method of processing black and white photographic silver halide materials
AssigneeEastman Kodak Company
InventorChristopher Barrie Rider
Life of this patent
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Abstract
A method of processing a black-and-white photographic silver halide material in which the material is passed though a processing machine having a number of processing tanks including a developing tank, a tank with fixing ability and one or more wash or stabiliser tanks wherein the rate of addition of wash or stabiliser solution to one or more of said wash or stabiliser tanks is a function of the concentration of silver or halide ions in one or more of the wash, stabiliser or fix tanks. No silver recovery means associated with the wash, fix or stabiliser bath is necessary.
Claims17
A method of processing a black-and-white photographic silver halide material in which the material is passed though a processing machine having a number of processing tanks including a developing tank, a tank with fixing ability and one or more wash or stabiliser tanks wherein the rate of addition of wash or stabiliser solution to one or more of said wash or stabiliser tanks is a function of the concentration of silver or halide ions in one or more of the wash, stabiliser or fix tanks.
A method as claimed in any in which the function is such that the fully processed material contains less than 200 mg/m.sup.2 of thiosulphate ion and 20 mg/m.sup.2 of non-image silver.
Dependencies are inferred from the claim text.