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US 4,879,267 AGranted
Method for color and black and white reproduction and formulation used therewith
AssigneeFluorographic Services, Inc.
InventorCharles P. Collier
Life of this patent
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Abstract
A more efficient and versatile method for color and halftone reproduction of artwork utilizing a colorless formulation that can be incorporated into art materials. When a mildly acidic spray is applied to the artwork which contains the formulation, the formulation turns blue. The blue color allows reproduction of red and yellow in certain photographic systems and can also be used in halftone reproduction to preserve light colors during the exposure step to eliminate dots from the background areas.
Claims16
A method of photographic color reproduction of artwork comprising:
- adding a solution comprising a colorless coloring agent to colored art materials;
- preparing a drawing using said colored art materials with the colorless coloring agent incorporated therein;
- sraying the artwork with an acidic spray which causes the colorless coloring agent to become colored;
- photographically reproducing the drawing;
- and
- restoring the artwork to its original color by applying an alkaline solution to the artwork.
3 more elements
Dependencies are inferred from the claim text.