Method for manufacturing half-tone printing plates

Details Method for manufacturing half-tone printing plates Method for manufacturing half-tone printing plates

1982-07-30

1984-08-28

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Including control feature responsive to a test or measurement

355 35, 355 38, 355 50, 355 53, 355 68, 355 69, 355 77, G03B 2772, G03B 2776, G03B 7232, G03B 2742

Patent

active

044684428

ABSTRACT:
The proposed method for making half-tone images on printing plates comprises a step of individually controlling light beams to switch them on and off according to whether a reference value representing a photographic density of minute point of an original picture is or is not smaller than numeral signals allotted to many divisional elements constituting each of many small dots, wherein a unit area corresponding to single dot area is divided into plural fine network patterns each having its own tone reproduction characteristic different from those of other patterns whereby the resulting soft dots can be dot-etched for color retouching of the half-tone images.

REFERENCES:
patent: 4025189 (1977-05-01), Pugsley

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