CN1045729A

CN1045729A - Plate-making method by positive plate for letterpressing

Info

Publication number: CN1045729A
Application number: CN 90101618
Authority: CN
Inventors: 颜昌玲; 颜昌松
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-03-19
Filing date: 1990-03-19
Publication date: 1990-10-03

Abstract

The present invention is printed directly on literal, chart on the transparent or semitransparent material with relief printing plate typesetting technique and printing method, with its dry plate (positive) as plate-making, shines into offset plate or copies into negative again with it with it again, makes the copper photo zincography.With this method system galley, saved according to the complicated procedures of forming and the equipment that resemble the plate-making of plate-making or computer laser, it is easy to have a technological operation, and printing quality height, small investment, cost is low, efficient is high, be suitable for generally printing advantage such as producer use.

Description

Plate-making method by positive plate for letterpressing

The present invention is a kind of printing plate-making method, relates to printing technology.

In existing plate making technology, no matter be offset plate or copper photo zincography, all adopt the photomechanical production method or adopt computer lasering lighting grate system plate-making, all there are problems such as technical sophistication, investment is big, cost is high, the scope of application is limited.

The objective of the invention is to provide a kind of plate making new method economic, practical, easy and simple to handle, that can use for general printing producer for fear of above-mentioned the deficiencies in the prior art.

Purpose of the present invention can reach by following measure: earlier the contribution (original copy) of required printing is lined up type form, if paper mold is cast into stereotype earlier, the machine of going up is then drawn a design, its literal, chart are printed directly on the transparent or semitransparent material, as the dry plate (positive) of plate-making, shine into offset plate with this positive again or repair and be roasted into negative, printing down, make the copper photo zincography with this positive.Letterpress such as last machine is drawn a design can select square chest machine, garden dish machine, platform machine for use, uprightly fly, Heidelberg, mix up pressure during printing, print clearly, tangible, density greatly, two sides double exposure preferably, if be imprinted on the transparent or semitransparent material except that paper, preferred ink used for plastic.

Be plastic sheeting, mylar, template, matrix paper, examine a kind of in shellfish paper, typing paper or other the transparent or semitransparent material as top said transparent material or trnaslucent materials.

The present invention is described in further detail below in conjunction with embodiment:

Embodiment one: original copy is lined up type form, if paper mold is cast into stereotype (1) earlier, last letterpress is drawn a design, literal, chart are printed directly on colourless transparent plastic film or the translucent template (2), make offset printing dry plate (positive) (3), shine offset plate (4), last offset press printing (5).

Embodiment two: original copy is lined up type form, if paper mold is cast into stereotype (1) earlier, last letterpress is drawn a design, literal, chart are printed directly on colourless transparent plastic film or the translucent template (2), make plate-making dry plate (positive) (3), be roasted into negative (4), printing down (5), make copper photo zincography (6), last letterpress printing (7).

The present invention has the following advantages:

1, quality height, with the plate-making dry plate (positive image) that this method is made, because contrast is big, even density, picture and text are clear, and its printing quality can reach computer laser phototypesetting level.

2, efficient height adopts this method plate-making, and each compositor can arrange 8000-10, the contribution of 000 word every day. If contribution is many, also can add several pairs of cabinet frames more.

3, cost is low, sets type with this method, and every K word unit price is lower than 7 yuan, is equivalent to 50% of photomechanical production or computer laser phototypesetting expense approximately.

4, small investment for printing producer, need not increase any main equipment, is only improved on mask-making technology, can realize the offset plate making printing, is with a wide range of applications and practical value.

Claims

1, a kind of plate-making method by positive plate for letterpressing, be after machine is drawn a design on type form that will sequence or the stereotype that is cast into, make dry plate (positive) with the method for taking a picture, make offset plate then or with after machine is drawn a design on type form that sequences or the stereotype that is cast into, make dry plate (negative) with the method for taking a picture, make the copper photo zincography then, it is characterized in that:

A: the type form that sequences or the stereotype that is cast into are printed directly on the transparent or semitransparent material as plate-making dry plate (positive), make offset plate;

B: the type form that sequences or the stereotype that is cast into are printed directly on the transparent or semitransparent material as plate-making dry plate (positive), are roasted into negative then, make the copper photo zincography.

2, method for platemaking as claimed in claim 1 is characterized in that transparent or semitransparent material is plastic sheeting, mylar, template, matrix paper, examines a kind of in shellfish paper, typing paper or other the transparent or semitransparent material.