Method of enhancing the information legibility of multi-color graphic material
OwnerSol Domeshekinventor
Life of this patent
Estimating the term…
Abstract
The information legibility of multi-color graphic material is enhanced by a method illustrated as follows: Frames of panchromatic silver-halide black and white negative film are separately exposed through red, green, and blue transmitting filters respectively to an image of the original multicolor material. The negative images on the frames of film are developed and fixed, and then printed on respective red, green, and blue-dye developing positive transparency materials. The red-dye, green-dye and blue-dye positive transparencies are then superimposed and retained in register.
Claims9
Method of enhancing the information legibility of original multicolor graphic material, while retaining the colors of the original but reversing the colorless low optical density of the background of the original and high optical density of the black printed information of the original, said method including the steps of
- A. analyzing the original multicolor graphic into its component colors by filtering the original multicolor graphic material through a set of at least 3 color separation filters covering the total visual spectrum to produce a set of positive filtered images of said original multicolor graphic material and simultaneously exposing each of a set of printing plates coated with light-hardening, panchromatically photosensitive, monochromatically recording material through halftone screens to each of said positive filtered images;
- B. treating the set of printing plates by conventional photo-litho/photo-engraving development techniques so that each plate may print only the patterns of the filter-colored light that struck it;
- C. coating each of the set of printing plates with an ink having a color like the color of the filtered image to which each photocoated printing plate was originally exposed;
- and
- D. overprinting respectively in register from each of the set of photographically developed, color filtered and ink coated printing plates onto an optically low density, colorless print receiving surface.
Method of enhancing the information legibility of original multicolor graphic material, while retaining the colors of the original but reversing the colorless low optical density of the background of the original and the high optical density of the black printed information of the original, said method including the steps of
- A. analyzing the original multicolor graphic into its component colors by filtering the original multicolor graphic material through a set of at least 3 color separation filters covering the total visual spectrum to produce a set of positive, filtered images of said original multicolor graphic material and simultaneously, singly exposing a set of frames of panchromatically photosensitive, black and white, negative recording material through halftone screens to each of said positive, filtered images;
- B. preparing a fixed, positive, black and white record from each of the color separated frames of (A);
- C. singly exposing each of a set of printing plates coated with light hardening, monochromatically photosensitive recording material to one of the set of positive records of (B) and treating the set of exposed printing plates by conventional photo-litho/photo-engraving development techniques so that each plate of the set may print only the patterns of the filter colored light that struck the frame in (A);
- D. coating each of the set of printing plates with an ink having a color like the color of the filtered image to which each antecedent frame in (A) of each photo-coated, printing plate of (C) was originally exposed;
- and
- E. overprinting respectively in register from each of the set of photographically-developed, color-filtered and ink coated printing plates of (D) onto an optically low density colorless print receiving surface.
Method of enhancing the information legibility of original multicolor graphic material, while retaining the colors of the original but reversing the colorless low optical density of the background of the original and the density of the black printed information of the original, said method including the steps of
- A. sequentially analyzing the original multicolor graphic into its component colors by filtering the original multicolor graphic material through a set of at least 3 color separation filters covering the total visual spectrum to produce a set of positive, filtered images of said original multicolor graphic material and simultaneously exposing a panchromatically photo-sensitive, positively imaging and monochromatically luminescent display system through half-tone screens to each of said positive, filtered images;
- B. singly exposing each of a set of printing plates coated with light hardening, monochromatically photosensitive recording material to each color-filtered luminescent display as it is generated;
- C. treating the set of printing plates by conventional photo-litho/photo-engraving development techniques so that each plate of the set may print only the patterns of the filter-colored light that struck the luminescent display in (A);
- D. coating each of the set of printing plates with an ink having a color like the color of the filtered image to which each antecedent luminescent display in (A) of each photo-coated printing plate of (C) was originally exposed;
- and
- E. overprinting respectively in register from each of the set of photographically developed, color filtered and ink coated printing plates of (D) onto an optically low density print receiving surface.
Dependencies are inferred from the claim text.