JPS5532034A - Offset engraving method - Google Patents
Offset engraving methodInfo
- Publication number
- JPS5532034A JPS5532034A JP10442778A JP10442778A JPS5532034A JP S5532034 A JPS5532034 A JP S5532034A JP 10442778 A JP10442778 A JP 10442778A JP 10442778 A JP10442778 A JP 10442778A JP S5532034 A JPS5532034 A JP S5532034A
- Authority
- JP
- Japan
- Prior art keywords
- exposed
- negative
- halftone
- photosensitive film
- original
- 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
Links
Landscapes
- Preparing Plates And Mask In Photomechanical Process (AREA)
Abstract
PURPOSE: To make possible easy gradation reproduction and stressing of only the dark parts without breaking the highlight and halftone parts of the original by using the combined positive double exposed with the halftone images and dot-free images based on the same original.
CONSTITUTION: An original 1 is exposed to a photosensitive film 3 through a color separating filter 5 and halftone screen 2, whereby a color-separating halftone negative 4 is obtained. On the other hand, a dot-free negative 4' is obtained similarily from another photosensitive film 3' without using the screen 2. Next, a photosensitive film 6 is exposed through the negative 4 and is further double-exposed through the negative 4', whereby the combined positive 6' is obtained. A plate material 7 is contact-exposed to this positive 6' with a transparent film 8 in-between, and is subjected to development, whereby an offset printing plate 9 is obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10442778A JPS5532034A (en) | 1978-08-29 | 1978-08-29 | Offset engraving method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10442778A JPS5532034A (en) | 1978-08-29 | 1978-08-29 | Offset engraving method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5532034A true JPS5532034A (en) | 1980-03-06 |
Family
ID=14380379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10442778A Pending JPS5532034A (en) | 1978-08-29 | 1978-08-29 | Offset engraving method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5532034A (en) |
-
1978
- 1978-08-29 JP JP10442778A patent/JPS5532034A/en active Pending
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