Color management in the printing process (2)
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What is a good process? And in this process can solve all the color problems, under a premise, that your profile has been completed, and the equipment has reached a stable situation, all aspects are ready, simple In terms of color management, the process is to Profile to Profile. For example: one of your images is to be printed on the printing machine, and the proof is on the inkjet printer. C, M, Y will be passed through the CMM. The value of L*, a*, and b* obtained by conversion of K value should be the same, that is, the color printed by a printer through the printer should be the same as that printed by the printing machine. It's very simple, but it's impossible to do it all in production. It's necessary to achieve color management through some auxiliary tools.
(1) The predetermined image already knows which printing machine to print on, and knows the profile of the printing press, knows the profile of the PC or Mac's workbench screen, and knows the profile of the printer they are using on the design side. In the production process, after the entire file is RIP, the version is enlarged, and the CIP3 is thrown to the printing machine to do a piece of data for each part of the ink control. At the same time, the Press Profile and the Proofer Profile are exchanged in various parts for color exchange. For the proofing machine, you can get a digital proofing of the simulated printing machine, and then through some Internet mechanisms, whether it is a full page or a single image, the printed color can be predicted on a remote machine. The ideal architecture for the entire color management.
We must consider the existing architecture, existing equipment or the cost of the investment in the process, all of which will have the following RIP methods of the CMS process:
(2) RIP before the big version, the output before the digital proofing is another RIP, in this RIP with our printer profile and proof profile, and then to our one digital proof, this is a RIP twice The way, it will create a problem of security, efficiency and cost, that is, buying more RIP and glyphs is a cost issue.
(3) There is another way of RIP once, which is better in terms of security and efficiency, but in such a solution, the quality problem is a consideration, there will be some differences in quality, RIP once must be pumped The way of the point, so the quality of the outlet is not as beautiful as the quality of the RIP method that produces the outlet.
(4) Combining the above various CMS production RIP methods, the overall performance of each method is relatively average. When selecting the CMS process, each manufacturer can import the CMS color management process according to the needs of each manufacturer, considering its Efficiency, cost, safety and its quality are considered.
(5) In addition, we can also use the Photoshop software environment, with the screen to establish the correct parameters to do the screen soft proofing CMS color management, then how to establish the correct parameters? First open the CMYK setup of Photoshop, transfer the correct ICC Profile, the correct printer profile, and the color of the screen is in RGB mode, so you must define the profile of the screen, you can correctly predict the printing color on the screen. In the color control of the screen, we must first establish three points: the white point of the screen, the brightness, and the gamma of the screen (the tone of the screen). The screen can also be corrected by various tools and software.