Reproduction process by using colour electrostatic plotter.

Abstract

Reproduction process by using colour electrostatic plotter has been developed as follows. 1 . Each outputted matters of three primary colours (magenta, cyan and yellow) and black colours by using colour electrostatic plotter are prepared by a 100 μ thick polyester film base chemical matted on one side and used with a black tonner. 2. The above each outputted films are exposed to a 175 μ thick lith film by a contact printer, and developed by an automatic developing machine, to prepare the negative films. 3. Prepared the negative films are exposed to a negative-positive type PS plate by a vacuum printing frame, and developed by an automatic PS plate processing machine, to prepare the press plates. 4 . Then, prepared the PS press plate are used for printing by a sheet-fed offset press. Printing ink is used on the quality of process colour ink of three primary colours and black. The merit of this reproduction process is that it will be able to output in the thick form of letters and symbols delineated on chart sheets and to prepare masking film for land tint and water tint plates using fill function in closed area which is furnished with colour electrostatic plotter, and to indicated on the new chart symbols and abbreviations using the half tone pattern.