Methods and compositions for retouching film images
AssigneeEastman Kodak Company
InventorsCharles M. Darmon, William G. Henry, Mary C. Kelley
Life of this patent
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Abstract
A method for retouching a film image comprises applying an aqueous composition to the film image. The aqueous composition comprises from about 5 to about 300 g/l of an acid selected from the group consisting of sulfuric acid, hydrochloric acid, phosphoric acid, and mixtures thereof, from about 1 to about 100 g/l of at least one compound selected from the group consisting of ascorbic acid, oxalic acid, sulfite compounds, hydroxyl amine salts, iodide compounds, hypophosphite compounds, dithionite compounds, tin(II) compounds, and mixtures thereof, and a balance of water.
Claims13
A method for retouching a color photographic film image, comprising applying to the film image an aqueous composition comprising from about 5 to about 300 g/l of an acid selected from the group consisting of sulfuric acid, hydrochloric acid, phosphoric acid and mixtures thereof, from about 1 to about 100 g/l of at least one compound selected from the group consisting of ascorbic acid, oxalic acid, sulphide compounds, hydroxyl amines, iodide compounds, hypophosphite compounds, dithionite compounds, tin(II) compounds, and mixtures thereof, and a balance of water, whereby dyes in the color photographic film image are reduced in their color intensity or reduced to their leuco colorless forms.
An aqueous composition for retouching a color photographic film image, comprising from about 100 to about 300 g/l of an acid selected from the group consisting of sulfuric acid, hydrochloric acid, phosphoric acid and mixtures thereof, from about 1 to about 100 g/l of a mixture of hydroxyl amine sulfate and at least one compound selected from the group consisting of potassium iodide, sodium iodide and ammonium iodide, and a balance of water.
Dependencies are inferred from the claim text.