Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1987-06-15
1989-11-07
Gallagher, John J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
101211, 156265, 156277, 156278, 356422, 427162, 427258, 434 98, B32B 3100
Patent
active
048789771
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is directed to a method for the production of systematic color tables or, respectively, color charts for seven-color printing and is also directed to color tables or, respectively, color charts produced in accord with this method, whereby color fields graduated with respect to one another or continuously blending are printed on a recording medium (printing material).
2. Description of the Prior Art
Systematic color tables for printing technology are already known wherein individual color fields in the form of a two-dimensional table are arranged side-by-side on white printing material (for example paper), whereby the color nuances change from color field to color field with increasing color density values in a prescribed graduation, and whereby the chromatic printing colors yellow, magenta red, cyan blue and the achromatic printing color, black, are usually employed.
Color charts for three-color printing or, respectively, four-color printing are already known which are produced such that an initial table shows systematic mixing possibilities between two chromatic printing colors and a third chromatic printing color is printed onto this initial chart in identical tint graduations, as disclosed, for example, in DuMonts' Farben-Atlas, Second Edition, 1981. Three different initial tables are present in this Farben-Atlas and each of these shows the mixing possibilities of two or the three chromatic printing colors of DIN 16 539. The printing color black is printed over these initial tables in identical tint gradations, as a result whereof these color charts are also suitable as monitoring or, respectively, comparison elements for a special characteristic of four-color printing, namely what is referred to as "achromatic structuring".
SUMMARY OF THE INVENTION
German Patent 29 35 457 discloses a method for the visualization of color nuances that is directed to the visualization of color nuances in an arbitrary magnitude, whereby the individual colors are printed on transparent foils which are placed on top of one another as overlays or, respectively, which are placed on a congruent underlay. What is thereby enabled is making a relatively large number of color nuances visible on the basis of a relatively small number of elements, i.e. underlay and transparent overlays.
Further, PCT/DE 84/04974 A1 discloses a reproduction method for producing multi-colored prints wherein the chromatic impression arises on the basis of a multitude of inked plane elements, whereby the image area is divided into sub-areas of identical size and every sub-area is dissected into juxtaposed plane elements which form a chromatic part and an achromatic part by means of which the color nuance of the appertaining image location which is to be produced is defined and the plane elements which form the chromatic portion are printed with a maximum of two of six chromatic printing colors yellow, orange-red, magenta-red, violet-blue, cyan-blue and green dependent on the chromatic portion to be produced and the plane elements which yield the achromatic portion are proportionally white and black dependent on the achromatic part of the sub-area to be produced.
The object of the present invention is comprised in specifying a method for a reproduction process having seven printing colors which is also referred to as seven-color printing with which systematic color charts or, respectively, color tables are produced. It is thereby irrelevant whether juxtaposed plane elements of PCT/DE 84/04974 A1 or superimposed screen structures are involved.
p BRIEF DESCRIPTION OF THE DRAWINGS
The invention shall be set forth below with reference to FIGS. 1 through 4. Shown are:
FIG. 1 a schematic illustration of the six initial tables on which the systematics of the respective color graduation may be seen;
FIG. 2 a portion from color table I of FIG. 1;
FIG. 3 three color charts for testing the grey condition of the six chromatic printing colors employed; and
FIG. 4 an example for the char
REFERENCES:
patent: 1597830 (1926-08-01), Rueger
patent: 3474546 (1969-10-01), Wedlake
patent: 3751829 (1973-08-01), Foss
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