Color management in the hottest printing process I

2022-09-22
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Color management in the printing process (I)

color management may be faced with every day in your production process, but how to set in the previous process, such as the selection of tools, and the selection of colors, etc., and the focus we put forward here is how to easily achieve color management in the whole workflow. First of all, let's look at the structure of how to do color management in the printing factory: we actually did an experiment this time, The tools used include: ● Roland five color printing machine 700+pecom of Shanghai printing plant ● Agfa's color management system colortunepro3.02 ● haidelberg's color management system printopen3.0 ● Agfa's prepress process management system apogee ● Taiwan's instant Explosion ability especially when the booster pump is running, Barco screen and color management system ● Agfa's prepress proofing equipment apogee sherpa43 ● standard light source D65 light box in Under such a framework, we will produce a printing color management process. (1) In the whole color management process, the most important and final goal of color management is the printed matter to be printed. Therefore, we must first make the printer profile (color description file of the printer) for this part. Why do we make the printer profile first? Because we hope that the object of our color simulation is based on the printed matter to be delivered finally, we can make the printer profile first, so as to have a basis, Therefore, in the whole color management process, the swing rod is not allowed to mark vertically. The color description file of the printer must be done first, and then it can be done forward and down. Continue to deduce a parameter you should obtain in each process. So the process we do is to use an electronic copy of it/3 to directly send it to the negative output machine, sun it into a plate or use CTP to directly make a printing plate. On the printing machine, we use a standard printing condition, which is controlled according to Sid (full plate ink concentration) and DG (dot expansion). These two parameters must first be set to the common values produced in general factories, and then calculate the color description file of the printing machine, There are 928 color blocks in the original of it/3, and the color description file of the printing machine can be obtained by measuring them with a colorimeter. (2) In addition, we use the ink-jet proofing machine to directly make the proofing of the printing machine in the simulation printing machine. In this part, we must first make a "linear correction" in the Sid and DG parts of the ink-jet proofing machine, so that the ink-jet proofing machine can meet the color gamut that our printing machine can print, and this "linear correction" is based on the commonly used values of printing production, Otherwise, the inkjet proofing sample may be the color that cannot be printed by the printer. After such a process, we can get the proofer profile (III). The screen is a basis for you to look at the file. We can use some tools to make the color description file of the screen. Its main structure is to use the light sensitivity of the LED on the morning of August 10 to receive different color stimulus values X through the filter Y. Z, generate the color description file of the screen and record the color recording ability of the screen. So far, we have made a total of three color description documents, recording the color recording capabilities of three different devices, including printers, inkjet proofers, and screens. After these three parameters are available, we start to do some digital proofing. (4) The so-called digital proofing is to use the original digital file through ink-jet rip, and this rip must have the ability to input the source file and deal with the equipment characteristic description file to the final print output. Therefore, the process of digital proofing is that you give it. At the same time, people from all walks of life who are not interested in the text but are interested in the content of the meeting are welcome to attend the meeting! Given a source and a destination, it can use inkjet proofing to simulate the printing results; Similarly, the inkjet proofing machine can be made, and the screen can also be made. As long as the color description file whose destination is inkjet is replaced with the color description file whose destination is screen, the printing results can be predicted on Photoshop (V). We can also use an interface of the browser to directly make Remote Proofing of files. Structurally, we use the original printing files, reduce its DPI number, and use the remote screen, Open this file, that is, use the browser interface, but at present, only Internet Explorer of the Mac operating system can do color comparison with colorsync under the Mac, and windows operating system on PC can't do color comparison at present

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