Into color management
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Color management is no longer a strange word, what is its purpose? Experts will tell you that installing a suitable color management system will reduce unnecessary troubles, and you will no longer be bothered by the endless complaints of color deviations by printing customers. Of course, the color management system will help you to recruit more. Printing business.
The birth of the color management system is closely related to desktop publishing and digital printing. In fact, the color problem is not prominent until the advertising design company, the creators and other users make simple design creations on the Mac. In the entire workflow of desktop publishing systems such as Sai Angel, Crosfield and Hell's electronic page imposition system, color information maintains good integrity and authenticity, so there is no need for color management, but the price is very Closed. Now we don't have to go back to the old path of closed systems because of color problems. If we do this, it is the end of the game.
When people talked about color management in the past, it was always seen as a simple question of how to match the final print with the proof sheet and how to control the color with the Kramerin and Brunel control strips. Today, the role of color management has changed a lot.
First, the imagesetter requires color management more than scanners and exposure devices.
Second, the PostScript page description language has gradually become an industry standard that can handle color page files, so color management in the PostScript workflow is on the agenda.
The PostScript2 processing page color file function that was just launched is not powerful. Today, PostScript3 can handle more color page file processing. Color management is born in this context.
Apple was one of the first companies involved in color management. Hard work pays off, Apple's efforts in exchange for the ColorSync color management system. As an industry-recognized standard, it is necessary to mention other related simple or complex software. Taking ColorSync as an example, the ICC Profile constitutes its basic building block. The ICC Profile converts a range of standard colors into colors approved by the output device. Output devices such as scanners, monitors, and printers determine how to process colors after understanding the color information, and then display or print them out after calculating the colors. The working process of a color profile is to convert any input color information into a color in the CIELab color space. In turn, it can convert the color of the CIELab color space into the color reproduction space of the output device. The algorithmic idea of the color characterization file is to realize the conversion of the color space.
When it comes to color management, we can't help but mention the ICC alliance. Members of the ICC Alliance come from some of the world's leading companies. The Alliance is committed to developing a color language that can be understood and recognized by a variety of media, devices and software packages. At the same time, the goal of ICC is to achieve the output device independence of the profile, that is, the openness of the profile.
The Profile system handles colors in two ways. The first method: the profile information built-in button operation in the device automatically generates open color information for the file to be processed, or interprets the open color information into the characteristic color of the device, and then displays or prints the file. In this way, each step of the process requires the merchant or user's profile software to support; the second way: the operator keeps the ICC Profile software in hand, when the file is processed, the operator loads the ICC Profile and sends the file to the next In one step, the operator here needs to load the ICC Profile. Of course, every step of the operator uses a special profile generation tool to generate profiles.
To generate a color characterization file, use a series of standard color samples and then use a luminometer to read the color samples and the color analysis table generated by the device into the ICC Profile. It's simple to say, but many printers just can't. The price of a photometer ranges from a few hundred to several thousand. ICC Profiles are readily available on the market. Some software from Agfa and Heidelberg Prepress are familiar. Some software such as ColorSavvy and ColorBlind are still relatively new.
Realizing the "what you see is what you get" in the true sense is the dream of print designers. Today, we are in the information world of the Internet. The early designers often don't know whether the color display on the other terminal is true or not. At this time, color management is indispensable. For the printing process, the current technological development is to use the buttons to control the color on the printing press to achieve the desired effect. Under the current technical level of offset printing, this method is not practical because many factors are only adjusted. It is not enough for the press to achieve the desired color. For example, it is obviously difficult to adjust the desired color with a press when we use a variety of different papers. The solution to achieve color control on the press is CIP3, which maintains good consistency throughout the print.
In the past, traditional proofing methods, control strips, densitometers, and photometers have proven to be effective in color control. At least for offset printing, the effect is very good. In fact, digital printing machines require a color management system because digital printing machines are more convenient to control graphic information and easier to print off-site.
At present, people can really see the color management. Some people even said: "Color management is like a good wish to lose weight and diet. Although you know it, you can't start it." In fact, the essence of color management is a process control that requires very precise. It is not a new technology. Some of the demanding requirements in process control are often not available to print workers. Of course, color management is one thing only if the printing customer is dissatisfied with the color of the print and refuses to pay the printing fee.