Using the G7TM proof-to-print (from proofing to printing) process can not only help you meet international production standards such as ISO, but also improve your overall process, reduce waste and downtime, and increase production efficiency, thereby helping you save costs and Maintain a leading position in market competition. Process control is a means to maintain market leadership Prepress operations and measurement tools in the print shop — The use of plate measuring instruments, spectrodensitometers and automatic scanning systems is critical to the smooth implementation of the G7 proof-to-print process. This article outlines the use of various measuring devices in prepress color management and print shop workflows, and explains how to use the information and data provided by these devices to help you get the many benefits of G7 process control. Throughout the history of modern business, people have been building processes for almost everything that needs to be done, from producing decorations and paying manufacturers to managing employee salaries. In today's severe economic situation, business owners always want to find shortcuts to make the company's balance sheet perform well. However, in fact, excellent process control is a better way to reduce wasteful expenses and increase return on investment. When everyone tries hard to stay ahead of the market competition, deploy the next steps, and retain customers, implementing a stable process is a strategy to ensure the long-term survival and development of the enterprise. This is especially true in the printing industry where competition is fierce, profits are low, and customer satisfaction (and retention) is closely related to the quality of each print. At the same time, for many printing companies, color accuracy is often synonymous with print quality. G7 process control case For a long time, the printing industry has been looking for a way to ensure that the colors used by designers and the colors of printed products printed by printing machines are more visually matched. There are many reasons for this: once you have the ability to predict the printing effect, and can better predict the prints that will be obtained from the printing machine before printing on the machine, you can reduce the reprint phenomenon, shorten the printing cycle, waste and prepare Reduced machine time, allowing you to immediately save costs while providing excellent color prints. In addition, you can show the printing quality through realistic and feasible printing guidelines and goals, which strengthens the communication between printing manufacturers and buyers of printing products. Recognizing this important industry demand, the IDEAlliance GRACoL (General Requirements and Applications for Business Lithography Offset) Committee began to develop a simple calibration process to help printers achieve a more "conforming match" from proofing to printing. . [next] The G7 proof-to-print process, as the name suggests, is a new method of color calibration for printing and / or proofing. G7 is to establish a circular system about the appearance of printed products, that is, the process from the printed product buyer to the design company to the printing industry and back to the printed product buyer. IntelliTrax displays G7 results that facilitate data analysis. Display content: HR, HC, SC and the corresponding black screen / screening neutral printing density. G7 has created many surprises in the printing industry, because with this method, you can print on any type of printing machine and any substrate, while still maintaining a continuous and consistent visual appearance. G7 is not only suitable for commercial printing, but also for publishing and news printing, flexographic printing, screen printing and inkjet printing. The importance of measurement tools in the G7 method The use of automatic color management tools is critical to the implementation of the G7 proof-to-print process. They not only maintain and monitor the calibration process, but also ensure accurate and traceable data every time, simplifying the entire workflow. ——DavidSteinhardt, President and CEO of IDEAlliance®. GRACoL research shows that dot measurement is not the only way to obtain a consistent visual appearance between different devices. The G7 printing calibration method uses spectrodensitometry to track neutral gray to improve the matching of hue and gray. Therefore, the spectrodensitometer is a key element of the G7 process. Measurement tools are essential for obtaining and maintaining G7 conditions in the three main processes of the G7 process: i1 measuring equipment is used in the proofing process to check the proofs; iCPlate2 or PlateScope is used to check the quality of the printing plate in the printing shop; the handheld Spectrodensitometer (such as 530) or IntelliTrax automatic scanning solution completes the entire process. Using these tools in the G7 process can ensure the consistency of process control. One of the important goals of the G7 process is to implement a consistent process control solution to enable users to understand the specific process between proofing and printing. In this process, there are many aspects that can be considered from a measurement perspective. The G7 process begins by measuring the proof sheet by measuring the P2P color scale in a linear format (usually using an X-Rite i1 spectrodensitometer). The information output from the measurement tool can be easily imported into IDEA Link Curve's IDEALink Curve software, and the information is evaluated according to the provisions of the G7 process. [next] The G7 process is usually used in the direct plate making (CPT) process. In order to ensure the reliability of the printing plate, the printing plate process needs to be calibrated. Place a ruler on the plate and then use a video-based plate measurement tool (such as X-Rite's iCPlate2 or PlateScope plate control technology) for measurement. Once the proofs are verified and the plate curves are generated, the next step in the process is to ensure that the actual presses can be calibrated and configured in the G7 process. The process in the printing shop is the same as the process in the proofing process. Users can use an automatic scanning system (such as X-Rite IntelliTrax) to scan and output the G7 P2P target color table in seconds. This data can then be imported into IDEALink Curve software to compare the results with the ideal NPDC curve. Curve software will make any necessary corrections for RIP. The automatic operation allows the user to repeat the verification process until the desired result is obtained. Once the process calibration is completed within the G7 process, it is important to ensure that daily operations support this process. Usually, you can achieve this goal by using measurement tools and regularly monitoring the plate values ​​and gray balance on proofs and press sheets. In this way, users can ensure that each printed product is consistent and meets G7 guidelines for successful color management. The specific features of the IntelliTrax automatic scanning solution make the daily evaluation and inspection of printed products printed in the G7 process easier. It can be monitored by timing sampling measurement and control strip. This method is specifically designed to support the G7 workflow. Printing professionals can track business trends and use the data in their daily maintenance processes, which is another benefit of using fully automated systems in the G7 process. Users can easily view the effects of the bright tone range (50/40/40), bright tone contrast (25/19/19) and dark tone contrast (75/66/66) specified in the G 7 process, and check the set color scale. CMYK field density. According to the visual presentation of the G7 gray color scale, it is easy to determine the gap between the printed sheet and the gray balance and what adjustments should be made to the solid ink to achieve the gray balance. In addition to using automatic scanning solutions, manual measurements can also be made with portable instruments such as X-Rite 528 or 530. After loading the G7 reference value, the device will display dE and / or other parameters against the solid tone and gray balance color scale specified by G7. This method can also achieve gray balance more easily and quickly, thereby saving users time and money. Benefits of the fully automated G7 process G7 sets up a simple calibration process, which can help printers obtain stable and high visual matching from proofing to printing, and provide real benefits for creative parties, print buyers and printers. The report from the printing manufacturer shows that, if the printing plate is produced using the fully automatic printing plate control technology, the matching of the sample and the final printed matter takes only a short time, and the number of printing plate remakes is less. For printing companies, the use of this process can help shorten printing preparation time and increase customer satisfaction. With G7, printing companies can print printed products separately on each printing device, or even print in different locations. Using a system (such as IntelliTrax) or a portable spectrodensitometer for printing means that printing companies can use different equipment, even in different locations, to print out prints with similar visual effects. The report shows that the printed sheets printed on an old device and a new device look so similar that no one can tell which press sheet came from which press. Using fully automatic measurement tools to implement process control can greatly reduce the cost of materials and labor in the production process. The key to success lies not only in the one-time process creation, but also in making full use of the advantages of available measurement technologies to automate the process and ensure that every printed product in the daily work complies with the G7 process. Using fully automated solutions can help you achieve these goals. Using these tools, your prints will be more accurate; you can quickly understand whether the prints are in line with the process; if not, these tools can help you collect the necessary data to make corrections. This saves you a lot of time and money. Become a strong competitor Implementing the G7 process using measurement tools will enhance communication between printers and customers and help avoid unrealistic expectations and disappointments. Having a fully automatic, repeatable G7 process can improve work efficiency, maximize technology investment, and help printing companies stay ahead of the competition. The G7 process can provide excellent solutions, meet customer expectations, and promote the printing industry to become a strong competitor in the communications market.
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The G7 proof-to-print process is based on the principles of digital imaging, spectrodensitometry and direct platemaking technology. G7 is based on the theory that the visual appearance from shadows to highlights (the image seen by the eyes) can be optimally controlled by gray tones, rather than by measuring the dots on the paper. The name G7 comes from the grayscale correction (G) technology and seven (7) ISO inks, focusing on the gray balance chromaticity data of each color highlight area and midtone area, rather than the density determination of each color (such as field Density and network expansion).
G7 stipulates the gray balance and "Neutral Printing Density Curve" (NPDC), and uses it as the basis for calibration and image reproduction to ensure that documents created with the G7 method can display similar visuals regardless of any printing process Exterior.
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