Owing to the rapid progress of computer and digital technology, conventional complicated prepress process is replaced by desk top publishing and printing plate process is also unified by CTP (computer to plate) system. Moreover, various kinds of digital presses are developed and the barrier between prepress and press is disappearing. As for the interface between prepress and press, the first step was pin system which relates the printing register. As the next step, ink presetting system was developed and widely used in order to shorten adjusting time of printing color tone. CIP3 system is put forward and is becoming the standard for the interface of printing process, as it transfers the information of prepress to the process thereafter. Digital presses with plates, such as GTO-DI and Quickmaster-DI are popular and SpeedMaster-DI, 74Karat, Truepress and some other new systems are recently announced. These presses will be widely accepted for the short run market. As for the digital prepress without plates, E-print, DCP and some other systems are widely used for on demand printing market with its features of dynamic image change, etc. Furthermore, a lot of new systems such as Elcography, etc. are being developed. Digital presses without plates are considered to be the final goal of integration of printing process and this integration of printing process is steadily and rapidly advancing industry.
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