Optics: measuring and testing – By shade or color
Patent
1983-05-25
1987-01-20
Evans, F. L.
Optics: measuring and testing
By shade or color
101211, 356421, G01J 352
Patent
active
046377280
ABSTRACT:
A method of colorimetrically evaluating a sheet printed on both sides thereof by means of a scanning densitometer having a mechanically controlled measuring head which is guided along a print control strip, to be evaluated and which produces a multiplicity of color density values representing color properties of the control strip, which includes assigning respective control strip measurement fields for different colors to respective printed parts on mutually opposite first form and perfector sides of a sheet, and forming a common control strip set out of all of the measurement fields, assigning to the measurement fields abbreviations for each of the respective ink colors in accordance with the colors to be printed, and introducing into a measuring system the color abbreviations assigned to the respective printing colors and to the respective sides of the sheet.
REFERENCES:
patent: 3890048 (1975-06-01), Abbondio et al.
patent: 4469025 (1984-09-01), Loffler et al.
patent: 4494875 (1985-01-01), Schramm et al.
patent: 4505589 (1985-03-01), Ott et al.
Kipphan Helmut
Loffler Gerhard
Evans F. L.
Greenberg Laurence A.
Harringa Joel L.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
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