Method and test element for determining characterization data of a printing process and apparatus for carrying out the method
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United States of America Patent
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Feb 18, 2014
Grant Date -
Aug 18, 2011
app pub date -
Feb 14, 2011
filing date -
Feb 12, 2010
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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. Then only a few colored areas are needed to calculate characterization data. A test element for determining characterization data of a printing process and an apparatus for carrying out the method are also provided.
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