Popular understanding of the color management ICC curve

Many people ask about the ICC curve, but they do n’t understand it. Some people even think that with the ICC curve, they can print very beautiful pictures. In fact, otherwise, I will give you a common understanding of the knowledge I have.

First of all, as we all know, the color gamut of RGB in computer software is very wide, and the computer uses computer language; and our printer uses C, M, Y, K or C, M, Y, K, LC, LM etc. can be called printer language. Because the color language output by the computer arrives at the printer, there must be a translator to translate it, such as combining black. In the PHOTOSHOP software in the computer, we can set the black to C: 50 Y: 50 M: 50 This ratio is not necessarily black) Then when the computer outputs a combination of black language, the printer driver will issue a C: 50 Y: 50 M: 50 command to the printer, and the printer will eject ink to form a pattern according to this command. .

Secondly, different materials and different inks will have different reflections. Compared with the cast paper and PP, the chemical reaction of the ink on the surface coating is different, that is, when the ink reaches these coating surfaces The amount will have different effects, so when the computer language is converted to the printer language, a correction needs to be made, so that the ICC curve plays a role.

Thirdly, the characteristics of different devices have also distinguished the recognition and execution of these languages. For example, EPSON first-generation nozzles and fourth-generation nozzles, the recognition and execution capabilities of these instructions and languages ​​are different, although the The ink is the same as the substrate, but different ICC curves must be formulated according to the equipment.

The generation of ICC curve: Through the cooperation of color management equipment and software similar to EYEONE, the production of ICC curve becomes simple and fast. EYEONE prints a standard color block on the substrate through the software, and then enters the color block into the software through the spectrophotometer, and compares it with the original color block. The deviation value generated is the ICC curve file. Different materials must have Different curves, of course, different inks also have different curves.

Therefore, some manufacturers do not understand the ICC curve and do not understand the meaning of the ICC curve, but simply test other inks to blend out the poor quality inks, and do not provide a complete color service system. This is seriously irresponsible to customers! Also, because desktop printers use fewer types of media, they already have a part of the curve-like file in the printer driver, so desktop printers do not need curve file support. The curve produced by the equipment is of course not good.

In the large format, the equipment using the third RIP software needs to have the ICC curve transferred into the RIP software for graphic output of the printing medium. Therefore, ICC curves cannot be ignored, and some curves cannot be downloaded from the Internet for random use.

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