G - Physics – 03 – F
Patent
G - Physics
03
F
101/119, 101/78
G03F 5/16 (2006.01) B41M 1/04 (2006.01) B41M 1/06 (2006.01) B41M 1/10 (2006.01) B41M 3/00 (2006.01) G03F 5/00 (2006.01) G03F 7/12 (2006.01)
Patent
CA 1084338
ABSTRACT OF THE DISCLOSURE Halftone printing is carried out by printing a first impression in entirety with a solid density of good render-ability from the middle-tone part to the light-tone part in a printed matter and printing at least a second im- pression, superposed over the first impression, with a printing plate lightly and supplementarily expressing only the parts of high dot density of the printed matter. A set of press plates for carrying out this printing process is also provided. A set of plates includes a first plate which has been contact photoprinted with a screened film made from a transparent or reflecting original and at least a second plate adapted to express somewhat lightly and supplementarily only parts of high dot densities (%) of the first plate. If desired a third plate can be used to express more lightly than the second plate and supplementarily only parts of higher dot densities (%) of the second plate.
268738
Fetherstonhaugh & Co.
Kohan Kabushiki Kaisha
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