Monobath processing of color film, including optical sound
OwnerHarris R. Millerinventor
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Abstract
An aqueous photographic tri-color processing monobath, which includes a color developer and a fixing agent, and which has a pH of about 10.6, is capable of color developing and fixing an exposed photographic film, without requiring any bleaching of the developed film. Moreover, apparently due to the compact morphology of the residual silver, it has been discovered that a monobath of the type disclosed is suitable for producing both an unobscured dye image and a silver plus dye sound track in a single processing step.
Claims4
A method of producing from an exposed, multi-color, photographic film element of the type containing silver halide, and suited for use in producing colored motion picture film, a composite print having thereon an unobscured dye image and an optical sound track of the dye plus silver variety, comprising,
- simultaneously, developing a color dye image and a dye plus silver optical sound track on said element in an aqueous monobath, and while the element is still in the monobath, fixing the dye image and sound track without bleaching the image and sound track areas, and
- washing the developed and fixed element,
- said monobath having a pH of less than 13.2, and containing in solution an aromatic amine developing agent, and an alkali metal thiosulfate fixing agent in concentrations of less than approximately 0.05 moles per liter of thiosulfate.
Dependencies are inferred from the claim text.