JPS5640829A - Plain halftone printing method and light source for engraving - Google Patents

Plain halftone printing method and light source for engraving

Info

Publication number
JPS5640829A
JPS5640829A JP11673079A JP11673079A JPS5640829A JP S5640829 A JPS5640829 A JP S5640829A JP 11673079 A JP11673079 A JP 11673079A JP 11673079 A JP11673079 A JP 11673079A JP S5640829 A JPS5640829 A JP S5640829A
Authority
JP
Japan
Prior art keywords
film
plain
halftones
light source
printing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11673079A
Other languages
Japanese (ja)
Inventor
Kiyotaka Hara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyodo Printing Co Ltd
Original Assignee
Kyodo Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyodo Printing Co Ltd filed Critical Kyodo Printing Co Ltd
Priority to JP11673079A priority Critical patent/JPS5640829A/en
Publication of JPS5640829A publication Critical patent/JPS5640829A/en
Pending legal-status Critical Current

Links

Landscapes

  • Light Sources And Details Of Projection-Printing Devices (AREA)

Abstract

PURPOSE: To enable printing to be performed with one sheet of contact film without using multiple kinds of plain halftone screens by printing the necessary plain halftones in the predetermined positions of a raw film at necessary percent dot areas by using the contact screen.
CONSTITUTION: In the case of printing plain halftones in the necessary local positions 2, 2' of a raw film 1, the film 1 is covered with a cut mask 3 and windows 4, 4' corresponding to the plain halftone printing parts 2, 2' are beforehand pierced. A contact screen 5 is placed between the film 1 and the mask 3; the film 1, screen 5 and mask 3 are closely contacted and set; the light from a light source 6 is controlled of its quantity by an ND filter 7 according to need and exposes the local positions 2, 2' on the film 1 with the light past the screen 5, windows 4, 4', whereby the plain halftones are formed. A local light quantity control function is provided to the light source device 6 and the plain halftones of different percent dot areas are printed simultaneously in several positions on the film 1.
COPYRIGHT: (C)1981,JPO&Japio
JP11673079A 1979-09-13 1979-09-13 Plain halftone printing method and light source for engraving Pending JPS5640829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11673079A JPS5640829A (en) 1979-09-13 1979-09-13 Plain halftone printing method and light source for engraving

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11673079A JPS5640829A (en) 1979-09-13 1979-09-13 Plain halftone printing method and light source for engraving

Publications (1)

Publication Number Publication Date
JPS5640829A true JPS5640829A (en) 1981-04-17

Family

ID=14694364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11673079A Pending JPS5640829A (en) 1979-09-13 1979-09-13 Plain halftone printing method and light source for engraving

Country Status (1)

Country Link
JP (1) JPS5640829A (en)

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