With the rapid development of the newspaper market, newspaper printing factories urgently need to improve the printing quality of advertisements, reduce the entire printing process, especially the pre-press time, improve the timeliness of news and the printing quality of newspapers, and improve in the industry. The market competitiveness has become an important issue that needs to be solved by newspaper printing houses, and it also brings good opportunities for the promotion and application of CTP.
The following describes the workflow characteristics of the CTP system and some experiences in the application process:
1. Staff training
CTP plate making system is a comprehensive multi-disciplinary technology industry, which includes precision machinery and optical technology, electronic technology, color digital image technology, computer and software technology, new printing plate and material technology, automation technology and network technology. The automatic production system therefore puts higher demands on the operators. According to the author's experience, CTP operators are divided into general operators and technical maintenance personnel, and targeted training:
Ordinary operators are mainly ordinary operations of the plate making process, including the line drawing of the Regier platesetter and punching, punching and bending equipment, training CTP basic plate making knowledge, simple computer operation knowledge and simple routine maintenance knowledge.
In addition to the knowledge acquired by ordinary operators, technical maintenance personnel must have a full understanding and understanding of the working principle, optical path principle, network digital process, computer interface technology, RIP process, and routine maintenance and emergency handling of CTP equipment. A comprehensive training of technicians is required.
For the newspaper industry, CTP is a new plate-making technology. Prior to the CTP, early training of operators and technicians will facilitate the smooth introduction of CTP.
2. The CTP workshop is best able to build a separate yellow lighting workshop.
CTP sensitized plates are very sensitive to natural light (including common lighting). Even very weak light can completely expose the entire plate exposed to light. The processing of the plate can only be done under the yellow safety light in the darkroom. get on. Therefore, it is better to build a separate workshop with a yellow safety light in the CTP workshop, so that in the event of a CTP failure, the machine can be safely opened, the fault is handled, and the PS version that has been transported to the exposure station is reloaded into the loading plate. The car continues to be used to save plate material, reduce production costs and avoid unnecessary waste. In the early stages of CTP use, this is especially important because operators are not familiar enough with the machine, and there are many misuses and human faults.
3. Keep the PS version flat
The KrauseLSJet300CTP is a platform-type automatic positioning and exposure platemaking machine that requires a very high level of flatness for the PS version. When the LSJet is exposed, the PS plate absorbs the PS plate on the platen through the vacuum of the small hole of the plate. Because the plate is not flat, the suction vacuum fails, and the exposure table does not enter the exposure program and directly outputs the plate, so the PS plate must be To keep it flat, you can't have the phenomenon of curling. In addition, when the operator puts the plate into the trolley, the flatness of the plate will also cause the exposure to fail.
4. Regularly clean the laser light path
After using the LSJet exposure platen for a period of time, the laser head and the prism are stained with dust, causing the light intensity to attenuate, affecting the exposure of the PS plate and affecting the printing quality. Therefore, regular cleaning of the light path is necessary. The Raychem plate-making machine has a laser light intensity detection device that can be displayed as a percentage on a computer by software. When the light intensity is less than 80% (maximum 100%), optical path cleaning is required. Cleaning the light path actually removes the lens and the reflective prism, so special tools such as lens paper, acetone, and tweezers are required.
5. Regularly optimize the process
CTP is a digital network process, whether it is a folding version, layout transmission, ink presets, digital proofing, etc., all through computers and networks. Computer processing speed and network connection speed directly affect the entire CTP production speed, so it is also necessary to regularly check the network and optimize the digital flow.
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