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Method for determining print process characterisation data

A technology of printing process and characteristic data, which is applied in the field of electricity, and can solve the problem that the system with spot color and multi-color system is slightly inconvenient, etc.

Inactive Publication Date: 2011-09-21
HEIDELBERGER DRUCKMASCHINEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Printed forms for the CMYK system can be well calculated by traditional methods of color measurement, which are slightly inconvenient and laborious for systems with spot colors and multicolor systems

Method used

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  • Method for determining print process characterisation data
  • Method for determining print process characterisation data
  • Method for determining print process characterisation data

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Experimental program
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Embodiment Construction

[0047] figure 1 Shown are test elements 1 , 2 according to the prior art, which are used, for example, to determine characteristic data according to ISO 12642-2:2006. This is a test element for a CMYK printing process. For example, these test elements can also be replaced by special test elements, which are required especially when using spot colors, by the manufacturer.

[0048] The test elements 1, 2 are formed from the color areas 3, wherein in general a distinction must be made between: the uncovered color area 4, i.e. the white color area 4, the color area 5 with mixed components produced 100% coverage of a single process color resulting in a full-color color zone 6 and a tone-value zone 7 made of only one process color, wherein the tone value of the individual process color forming the basis for the color zone coverage can lie between 0 and 100% between.

[0049] Such as figure 1 The test elements 1, 2 shown in are generally so large that for this purpose at least on...

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Abstract

A method for calculating characterization data of a printing process, is more manageable and less complicated than previously-known methods, in which determining printing tables for CMYK printing systems with special colors or for multicolor systems easily becomes unwieldy and complicated because of necessary colored areas in test elements. A test element supplies actual spectral data. By using subsets of this actual data, tonal value curves or tonal value gain curves, parameters of a model of the printing process for determining spectra of overprinted printing inks and adapted input variables, are determined in a calculating device in accordance with the model, taking into account the tonal value gain, to determine corrected tonal values or their spectra.

Description

technical field [0001] The invention relates to the technical field of electronic reproduction and to a method for determining characteristic data used in a printing process, wherein first at least one test element having a certain number of color zones is printed on a printing material, at least one printed The hue values ​​of the colors are assigned to these color regions, the color regions of the at least one test element are measured spectrally by the measuring device to obtain measurement results, and these measurement results are stored as spectral actual data. Background technique [0002] In plate-making technology, printing originals for printed pages are produced, which contain all elements to be printed such as text, graphics and images. When printing in color, a separate printing manuscript is produced for each printing color, which contains all elements printed in the corresponding color. In four-color printing they are the printing colors cyan (C), magenta (M)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F33/00G01J3/46
CPCH04N1/6033
Inventor G·贝斯特曼
Owner HEIDELBERGER DRUCKMASCHINEN AG