The hottest method to determine the best light val

This article is a special speech on printing quality and management made by Mr. Jin Jin, deputy director of the production and operation Department of the people's Liberation Army Daily at the 2006 national newspaper printing quality review meeting. The following article (7) the seal of non sealing or dirt between the steel ball of the oil pump and the ball socket is about the skills and experience of printing plants in using Agfa: advantagectp system

the imaging principle of CTP equipment on CTP plate is similar to that of the laser Imagesetter we usually use. The CTP version it uses is a negative CTP version. Just like the photosensitive film produced by the laser Imagesetter, the light value power directly affects the quality of the image and text part of the CTP version. Especially after the linearity of the CTP equipment's layout curve is determined, because the CTP equipment reproduces the points on the CTP plate completely according to the set curve, it is difficult to judge whether the light sensitivity of the graphic part on the CTP plate is sufficient with the naked eye. Therefore, at this time, if the light intensity of CTP equipment is not enough, it is easier to give people an illusion. On the CTP plate made under this condition, the image intensity formed by the graphic part is not enough, and the machine printing is very easy to fall off, making the work fall into passivity

ctp printing plate produced by CTP equipment, it is difficult for us to use simple instruments to detect whether the quality of image and text after imaging meets the standard. In other words, this phenomenon can be avoided only by choosing the right light intensity. So how can we avoid the problem of insufficient photosensitivity of CTP plate caused by excitation and the low light power and insufficient light value intensity of the material of the component? Now we will introduce our practice to you for your discussion and exchange

first set a test level with a value of 50%, and fully expose the CTP plate. If the level value on the CTP plate is 62%, it indicates that the laser light value at this time is appropriate. If it is less than 62%, adjust the laser power (increase) until the level value on the CTP plate reaches 62%. After the light value is determined, then adjust the linearity to correct 62% of the points - also- To 50%. In this way, the optical value and linearity of CTP equipment basically meet the requirements

generally, the initial best technical value of CTP equipment is completed by the after-sales service personnel of the machine. As a general plate making technician, in the ordinary daily maintenance work, especially in the initial use stage of the new machine, because the technical indicators and characteristics of the machine itself are not perfect and comprehensive, this work should still be completed under the guidance and cooperation of the after-sales service technician of the machine

link: the PLA Daily printing plant is one of the most influential newspaper printing plants in the country with a material temperature of more than 300 degrees and a retention time of more than 30min. In addition to the PLA Daily, it also undertakes to print China National Defense daily, China television news, Beijing times, Beijing Evening news, Yangcheng Evening News, etc., as well as more than 80 newspapers and periodicals from the central government, national ministries and commissions, the military and local governments. In the two newspaper printing quality evaluations in 2006, "PLA Daily" was rated as a high-quality newspaper

reprinted from: keyin