| 摘要 |
<p>PURPOSE:To make screen-free printing plate using a color decomposition halftone positive film and also make a chromatic shear in printing less conspicuous in multicolor lap printing at the outer contour part of a linear picture image, if a multicolor linear picture image (solid linear picture, plan linear picture and shading linear picture image) is contained in an image on the color decomposition halftone positive film to be used for plate making. CONSTITUTION:A multicolor decomposition halftone positive image 1 consisting of decomposed colors and shading gradation regenerated in halftone based on a copy image, and a linear picture positive image are prepared. Further, the multicolor decomposition halftone positive image is exposed on a positive- type lithographic printing plate 13 through a transparent or a transluscent film 12 with dispersion effects for development. On the other hand, the linear picture positive image is exposed on a positive-type lithographic printing plate for development. Thus a screen-free printing plate and an ordinary printing plate are manufactured and printing is performed using these plates.</p> |
