Six reasons for the inconsistency of color in digital printing
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Digitally printed ICC (color management) files are obtained by measuring the printed color table with a spectrophotometer (different spectrophotometers use different color meters), all color management software can use the same printed ICC file.
However, different printers use different PS versions, different papers, different inks, different printing machines, different printing conditions, etc., resulting in certain differences in printed ICC file information.
Therefore, in China, printed ICC files will vary from printer to printer.
Color management software typically includes the printer's ICC file and printed ICC file.
The ICC file base of the printer used by different color management software is different, so the printer ICC file between softwares cannot be used universally.
6 reasons why the actual production color is inconsistent
After the conversion relationship between ICCProfile and printed ICCProfile is established by the digital proofing color management software, from the design idea of the color management software, the matching of the proofing result and the printing result is realized, that is, the proofing color is consistent with the printing color.
However, in the actual production process, all the requirements of color consistency cannot be fully satisfied. The reasons are as follows:
1. The color block for ICCProfile test can only divide the color space finitely. The transition color in the middle can only be simulated by software operation, and the color control software can only control the color of the device through limited points. Therefore, there is absolutely no guarantee that there will be no chromatic aberration.
2. The spectral characteristics of the proofing ink are inconsistent with the spectral characteristics of the printed ink, while the spectrophotometer only reads the chromaticity value under the standard light source, and this value is not guaranteed to be uniform under any light source.
3. There is a certain difference in the stability and uniformity of the printed sample provided with reference, and the sample will have some color drift.
4, the stability of the proofing system itself and the error and environment of the measuring instrument will affect the consistency of color.
5. The color of the same sample is different under different lighting conditions, observation angle, background color and other conditions.
6. The subjective feeling of the observer may cause inconsistencies in color perception.
The color management software and the special ICC production software package can basically solve the above problems through different ways (such as curve adjustment and individual color adjustment), reduce the color error, and meet the different needs of actual production.