3. Standardization of digital proofing
Through the standardization of digital proofing, the color of digital proofing can be basically the same as the printing color, so as to accurately reproduce the quality effect of the front-end color separation processing, and use it as the standard for printing proofing.
The equipment and materials provided by Henan Ruiguang for standardization of digital proofing mainly include: selection of EPSON 7908 printer (printing precision selection of 720dpi × 720dpi), Eye-One Pro spectrophotometer, Founder Changli ProfileMaker5.05, Pantec 180g / m2 Digital proofing paper, EPSON "Century Rainbow K3" pigment ink. The specific implementation steps are as follows.
(1) Do the basic linearization of the printer
The principle of printer basic linearization is to correct the printing color deviation by checking and adjusting the density values ​​of ink droplet matching at all levels of the printer, to achieve linear matching of the printer density and ink volume, to achieve the ideal color gamut, and to establish the printer's ICC file.
(2) Create a profile file for the first color space conversion
The first color space conversion is to convert the above-mentioned printed ICC file and printer ICC file under relative chromaticity conditions, and print out the EIC 2002 color target proof. At this time, the accuracy of color restoration cannot meet the production requirements. Further modification.
(3) Create the final profile file
Carefully modify and edit the first color space conversion ICC file, so that the accuracy of digital proof color restoration reaches more than 95%, and the color difference △ E≤2. If △ E> 2, the linearity of digital proofing should be corrected in time to make it conform to the requirements of ISO12647-7 digital proofing process standard.
4. Screen soft proofing standardization
The monitor is an important pre-proofing tool for pre-press image color separation processing. Through the calibration of the monitor and the production of characteristic files, the soft-proofing of the screen can achieve the “what you see is what you get†effect. The steps for standardizing soft proofs on the screen are as follows.
(1) Display calibration
Henan Ruiguang is equipped with EIZO Color Edge CG24.6W monitor. It uses Eye-One screen calibrator to accurately calibrate the monitor. The color temperature is set to 5500K, the gamma value is 2.2, the brightness is 80cd / m2, and the blackness is 0.14cd. / m2 combination, so that the display reaches the maximum color gamut range and the best color rendering.
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