Eastman-kodak Company

Heidelberger Druckmaschinen Ag

Eggert Joachim Jung

Wolfgang Eberhard Luxem

Thomas Zelenka

Holger Runkowske

Norbert Freyer

Johann Weigert

The invention relates to a method of generating a printing color profile for printing a printing image with a digital color printing machine, in particular a multi-color printing machine, preferably an electrophotographically operating printing machine. A transparent layer on top of a multi colorant printed image is taken into consideration during the generation of the printing color profile such that a differential clear printing color profile for the clear material effect is determined, said clear printing color profile being added, as needed, to the printing ink color profile of the remaining printing colors for defined substrate classes and specific clear material and coverage levels.

Method of generating printing color profiles for color managed reproduction of color prints with transparent layer

Recognizing a substrate stock by light-sensitive sensors inside a printing unit, by a sensor that can recognize several ranges of light wavelengths. By separate recognition of various ranges of light wavelengths, a substrate stock is recognized whenever the total reflection capabilities of surface and substrate stock determined across all light wavelengths coincide.

Process and device for recognition of substrate stock by means of light-sensitive sensors

To regulate the gloss on a print material, and avoid excess release oil, the properties of the fusing medium are measured, and the gloss on the print material is determined on the basis of the measured properties of the fusing medium.

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Schoenberg, Germany

Eggert Joachim Jung