Patent · US Expired

Method for a reproduction of colored masters in four-color printing using color reduction

US4482917A · kind A · utility

38Cited by

9References

9Claims

0Family size

Assignee

Dr. Ing. Rudolf Hell GmbH · DE

Inventors

Werner Gaulke · Kiel, DE
Eggert Jung · Soest, DE

Key dates

Filing date	Mar 9, 1982
Grant date	Nov 13, 1984
Priority date	—
Expiry date	Mar 9, 2002

Classification

Technology area (CPC H)Electricity
CPC primaryH04N1/6027
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method for reproducing colored masters in four-color printing where a color reduction or removal (UCR) which differs between the gray area and the chromatic area of the master is utilized in the production of the color separations. In the gray area, a color reduction is done in which a gray balance is produced between the three chromatic printing ink signals Y, M and C. In the chromatic area of the master, a color reduction matched to the respective maximum mean and minimum value of the three chromatic printing ink signals Y, M and C is accomplished.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.