First, the prepress color management system is established.
1, digital proofing solution
Introduction to the realization principle of digital proofing
B ink for digital proofing
Paper for digital proofing
Three-dimensional digital proofing machine
Electronic proofing software
Introduction to the realization principle of digital proofing
Digital proofing refers to a new proofing technology based on digital publishing and printing system, which processes the graphic information of the page and directly outputs color samples in the publishing and printing production process according to the publishing and printing production standards and specifications. That is, the printed sample is directly output by using the digitized manuscript. The output samples and prints can be as high as 98.5%, which has incomparable advantages over traditional proofing. The principle of its realization is to describe the colors related to proofing equipment in a device-independent way, that is, to describe the color characteristics independent of equipment by adopting the ICC specification provided by the International Color Federation in 1993. In this paper, CIE XYZ and CIE Lab, which are independent of devices, are used as standard color spaces, which are called PCS(Profile Connection Space). CMYK colors related to proofing equipment should be converted to CIE XYZ or CIE Lab space first, and then transmitted to digital proofing equipment, so as to ensure the color consistency between digital proofing equipment and printing machine!
The ICC feature file PCS feature file of digital proofing machine is connected with the ICC feature file of space printing machine.
B ink for digital proofing
Haoyin is committed to the research and development of multimedia digital printing solutions. Provide comprehensive and rich cross-industry solutions, help printing plants meet the standard operation of printing process automation, help enterprises cut costs, improve their core competitiveness and help you get more orders!
"Random Printing Imitation Printing Ink" is a special ink jointly developed by Xiamen Good Impression Digital Technology Co., Ltd. and Wuhan University, and obtained the national patent certification. The color gamut range of this ink is completely consistent with that of printing ink, and it can be printed on coated paper, white cards, gold and silver cards, pearl paper, PVC, stickers, etc., with accurate color and strong applicability, which ensures the consistency of color presentation.
Paper for digital proofing
It is consistent with the paper used in the printing process, without special proofing paper, which avoids the difference between proofing color and printing color caused by different white colors of paper and ensures the consistency between customer sample signature and printing color.
Three-dimensional digital proofing machine
The multimedia printing system with "fast printing" or "random printing" is powerful, and it has established an excellent reputation in the market in terms of color gamut, output accuracy, smooth and delicate hierarchical transition, and even restoring the spot color of packaging proofing. Meet the needs of layout proofing to direct plate making. It can well simulate the effect of high screen number and FM screen printing, and is an excellent support for CTP publishing.
Electronic proofing software
Adopt independent RIP kernel, excellent color management ability; The new grid technology can ensure the smooth transition and accurate replication of points; The adopted color algorithm enables users to easily and effectively use their existing proofing environment to simulate the printing environment; After setting different color profiles ICC, it is very simple and convenient for users to use; It provides a color fine-tuning function, and it is very convenient to use the VCC file generated by the visual correction function to fine-tune the color.
Second, the whole digital output system of Yinjielong CMS
CMS dual-system color management server integrates graphic design, output proofing, color management and other software, and adopts the dual combination of Windows and Mac system to effectively ensure the accuracy of proofing color and improve output efficiency.
1, Windows is responsible for output proofing, design and production;
2. The 2.Mac is responsible for color management and diagnosis:
A. verify the contents of the ICC description file installed on the computer and whether any description file is inconsistent with the ICC description file.
Specification, repair all description documents that do not meet the ICC description document specification;
B. Diagnose and repair color management, such as printers/presses/monitors/scanners/digital samples, and even remote virtual proofing.
In the whole digitization process, RGB to CMYK and CMYK to CMYK are converted incorrectly;
C, remotely demonstrate the setting and operation of RIP proofing software server and the application of correct gamut mapping relationship;
D collection and analysis of curve measurement data defined by customers;
E, evaluate and analyze the accuracy of digital proofing;
Equipment and instruments put into use:
1, CMS dual-system color management server
2528 density meter price list
3.EYE-ONE spectrophotometer
4. Yinjielong digital proofing machine
5.EFI RIP color management software
Third, the screen soft proofing solution.
Introduction to the realization principle of soft proofing
C display for soft proofing
Three-dimensional soft proofing software
Introduction to the realization principle of soft proofing
Screen soft proofing is a kind of proofing method to simulate the printed output effect on the display. Through color correction and color management, the display effect between monitors is consistent, and the color displayed by the monitors is consistent with the color reproduction effect printed by the printing machine. It has the advantages of intuition, convenience, quickness, flexibility, cost saving and production efficiency improvement. Soft proofing not only realizes the concept of "what you see is what you get", but also brings more effective communication methods, more effective processes and production management concepts.
C display for soft proofing
If you want to get accurate soft proofing effect on the screen, you must use a professional wide color gamut display. The color gamut range of soft proofing display must be larger than that of analog printing, which is the premise of the effectiveness and feasibility of soft proofing and can ensure the complete and accurate reproduction of printing color gamut. The stability of the display has a great influence on the display. High-end monitors should have self-stabilizing display function, which can quickly enter a stable working state when they are turned on. It also has an independent and adjustable mode. At present, the professional monitors used for soft proofing include Apple Monitor, Zhuo Yi Monitor and Dell u24 10 Monitor.
Three-dimensional soft proofing software
The software used in soft proofing is professional color management software, which can make display feature files. Through stimulation and corresponding methods, the data is sent to the display to stimulate the display to develop color, the measured data is compared with the stimulated data, the difference between stimulation and correspondence is calculated, and the corresponding compensation value is calculated to generate the feature file ICC. Then, through the color management scheme, the non-measurement data are processed by the corresponding engine to form the mapping relationship of the whole color gamut and the corresponding relationship of CIE XYZ or CIE Lab, and the generated feature file is imported into the computer to control the color rendering characteristics. You also need to simulate the characteristic file of the printing machine.
Equipment and instruments put into use:
1, PROFILEMAKER software
2. Wide color gamut display (recommended by Dell u240 1)
3.EYE-ONE spectrophotometer
Four. CTP color management solution
Introduce a CTP color management scheme.
CTP color management software
Tools used in CCCTP color management
Introduce a CTP color management scheme.
What has always been a headache for CTP customers is that the dot printed by CTP plate-making machine always fails to achieve the expected effect, the developer replenishment amount and printing plate hot stamping amount can never be well linearized, and the dot deviation of different batches of CTP plates always exists in use. Standardization of CTP plate making machine, punching machine and related consumables is imminent. Adjust the energy value, rotational speed value, focal length value, development time and temperature during plate punching, and pressure between rollers of CTP plate making machine, and use different parameters to distinguish different plates, so that the developed CTP plate has clear and bright dots and sharp edges, reaching the corresponding standards. By compensating and adjusting the printing plate curve, the dot gain value of the printing machine meets the corresponding standards, such as G7 standard, FOGRA standard, Asian standard or China standard. Only in this way can the color of CTP plate making and printing be consistent with the color of digital proofs.
CTP color management software
Because different CTP processes have their own software to adjust the printing curve, such as Harmmy software in Kodak printing technology; Screen Tureflow dot enlargement software, calibration manager plug-in in the brand-new Yintong, printing plate curve adjustment brought by Founder Long Stream ElecRoc, Heidelberg Prinect/Delta, Agfa ApogeeX, etc. The curve is generated by the current curve and the target curve according to a certain mapping relationship. The generated curve is embedded in RIP process, and the CTP plate-making machine is controlled to output plates. Software and printing machine with CIP3 interface can transmit printing plate curves between CTP machine and printing machine.
Tools used in CCCTP color management
It is necessary to use the printing plate dot measuring instrument (ICP Latet) of Ashley Company in the United States, which can measure the printing plate dot quality quickly and accurately. Through the built-in high-precision camera, we can analyze the dot percentage, the number of screen lines, the shape of the dot and the screening angle of the printing plate, and display them on the LCD screen.
Equipment and instruments put into use:
1, ICPLATE printing plate dot measuring instrument
2528 densimeter
Five, printing machine color management solutions
Introduction of color management scheme of printing machine
Printing machine color management software
Printing machine color management instrument
Introduction of color management scheme of printing machine
During the operation of printing machine, the changes of ink roller, water roller, blanket and printing pressure will affect the reduction of printing dots. Because the printing pressure between different printing machines is different, the same dot reduction will be different. Because of this difference, it is necessary to manage the color of the printing machine and make the corresponding printing machine characteristic file ICC for different printing machines. This feature file is generated by different printing machines, and the matching degree between digital proofing color and printing machine color is higher!
Printing machine color management software
The software uses a printer to print the color code file according to the standard, and automatically inputs the data of the printed color code file measured by the spectrophotometer into the software. The software will associate the CMYK value generated from the ink with CIE Lab or CIE XYZ value, which will be used as the connection space between the PCS feature file and the ICC interface of the digital proofing machine feature file. This space can make the digital proofing color consistent with the printing color.
Printing machine color management instrument
It is necessary to use the Eye -one instrument of Ashley Company in the United States, which can be directly connected to the color management software and transmit the measurement data directly to the software. Eye-one is used to create and edit color management files of printout devices, including monitors, scanners, digital cameras, printers, printers and so on. Then apply the color profile to the application or driver or RIP to get the correct color.
Input equipment and instruments:
PROFILEMAKER software
EYE-ONE spectrophotometer
528 densimeter
Reference address: