Process for the ink control or regulation of a printing machine by comparing desired color to obtainable color data
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United States of America Patent
Stats
-
Oct 30, 1990
Grant Date -
N/A
app pub date -
Dec 5, 1988
filing date -
Dec 16, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a process for the ink control or regulation of a printing machine the actual color coordinates of measuring fields are compared with the desired color location. If the desired color location is found outside the correction color space defined by the boundary values of the full tone densities of the printing inks, as a substitute for the given desirable color locations, attainable desired color locations are determined on the surface of the correction color space by finding the point on the surface of the color correction space that is nearest to the given desired color location. The search for the nearest point may also be carried out in a manner such that the nearest point on the surface of the correction color space is sought in the direction of the brightness axis of the color space. If in the process, a boundary value of the brightness error is reached, the attainable desired color location is determined beginning at the desired color location displaced along the brightness axis to the maximum permissible brightness error.
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