CN115091872A

CN115091872A - Printing method for priming by using UV gloss oil

Info

Publication number: CN115091872A
Application number: CN202210756954.XA
Authority: CN
Inventors: 李中雷
Original assignee: Amity Printing Co ltd
Current assignee: Amity Printing Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-09-23

Abstract

The invention discloses a printing method for priming by using UV gloss oil, which comprises the following steps: preparing a printing plate according to the picture and text to be printed; preparing a multicolor offset press, filling UV gloss oil into a first color group of the multicolor offset press, filling other color ink into a second color group and a subsequent color group of the multicolor offset press according to requirements, and installing a printing plate on the second color group and the subsequent color group of the multicolor offset press; the printing method uses the first color group of the multi-color offset press to print a layer of UV gloss oil on the surface of the printing stock, can reduce the surface roughness of the printing stock, solve the problem of powder falling during printing, enable the color of the printing ink to be brighter and saturated, realize mass and continuous production, and has good application value.

Description

Printing method for priming by using UV gloss oil

Technical Field

The invention relates to the technical field of printing, in particular to a printing method for priming by using UV gloss oil.

Background

UV printing has become one of the most important printing techniques in the printing industry, with its own features and advantages. The UV printing process mainly refers to a printing process of using special UV ink to realize local or whole UV printing effect on a UV printing machine, and drying and quickly curing the ink by ultraviolet light, and is mainly suitable for printing non-absorbent materials, such as: gold card paper, silver card paper, pearlescent paper, transparent non-setting adhesive, plastic, PVC, PE, grating and the like. Compared with the traditional offset printing, the UV printing has the characteristics of gorgeous coloring, special printing material, novel product, wide market prospect and the like, and is suitable for the product fields of high-grade fine product packaging, high-end commercial picture books, special calendars, special label printing and the like.

However, UV printing has high requirements on the surface adhesive force and the smoothness of printing stocks, and the problems of powder falling and the like easily occur on some printing stocks with low adhesive force and high roughness, so that the brightness and the saturation of printing ink colors are greatly reduced, and the quality of printed matters is influenced. In order to solve the problem, a method of spraying a layer of UV varnish on the surface of a printing material in advance is generally adopted to improve the surface smoothness of the printing material, but the conventional method of spraying the UV varnish is often low in efficiency and cannot meet the requirements of large production capacity, especially the continuous production of multicolor offset printing equipment.

Disclosure of Invention

Offset presses are the mainstream equipment for printing high-grade commercial, book and periodical printed matters. An offset printing machine is a kind of offset printing machine, when printing, a printing plate is prepared in advance according to the required printing text, and is printed on a rubber cylinder by the printing plate, and then is transferred to paper by the rubber cylinder. Offset presses can be classified into flat-sheet offset presses and web offset presses according to different paper feed modes, the offset presses can be provided with a plurality of color groups, a plurality of colors can be printed at one time to form multicolor or colorful printed matters during printing, and the offset presses can be classified into single-color, double-color, four-color, eight-color machines and the like according to the number of printing colors finished by one paper feed.

The invention aims to solve the defects in the prior art, and provides a printing method for priming by using UV gloss oil, in particular a printing method combining UV gloss oil with a multicolor offset press.

In order to achieve the purpose, the invention provides a printing method using UV gloss oil for priming, which is characterized by comprising the following specific steps:

(1) preparing a printing plate according to the picture and text to be printed;

(2) preparing a multicolor offset press, filling UV gloss oil into a first color group of the multicolor offset press, filling other color ink into a second color group and a subsequent color group of the multicolor offset press according to requirements, and installing a printing plate on the second color group and the subsequent color group of the multicolor offset press;

(3) and starting a printing process of the multicolor offset press, wherein the first color set prints a layer of UV gloss oil on the surface of a printing stock, and the second color set and the subsequent color set print the to-be-printed pattern and text.

Preferably, in order to reduce the usage amount of the UV gloss oil, the printing method further comprises the step of preparing a UV printing plate for the printed matter with the area of the graph and text to be printed being smaller than the area of the printed matter, wherein the UV gloss oil area of the UV printing plate is slightly larger than the area of the graph and text to be printed, and the UV printing plate is installed on a first color group of the offset press.

More preferably, the multicolor offset printing machine can be a flat paper offset printing machine or a roll paper offset printing machine.

The multicolor offset press can select 2-color offset presses and offset presses with more than 2 colors. If 2-color offset press is selected, because the first color set is used for printing UV gloss oil, only one color can be actually printed by the second color set, and when more color set offset press is selected, more colors can be printed for the printing stock.

The invention discloses a printing method for priming by using UV gloss oil, which is characterized in that a first color group of a multicolor offset press is used for printing a layer of UV gloss oil on the surface of a printing stock, namely priming and covering the surface of the printing stock, and then a subsequent color group is used for printing a to-be-printed picture and text, so that the UV gloss oil and printing process can be completed by the offset press at one time, the surface roughness of the printing stock can be reduced, the problem of powder falling during printing is solved, the printing ink color is brighter and saturated, the technical effect of mass and continuous production is achieved, and the requirements in production practice are greatly met.

The printing method has the characteristics of ingenious conception, no need of changing the existing equipment, good printing quality and the like, compared with the traditional offset printing process, the method can realize the purpose of finishing glazing and printing at one time by only using one more color set, can be used for both a flat paper offset press and a web press, and has particularly good application value.

Drawings

FIG. 1 is a schematic view of a multicolor offset printing press using the printing method of the present invention.

Wherein 10 is the offset machine body, 11 is the paper feeding mechanism, 12 is the output mechanism, 1 is the first color set, 2 is the second color set, 3 is the last color set.

Detailed Description

How the present invention is embodied will be described below with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example 1:

referring to fig. 1, a multicolor offset press is provided with a paper rolling mechanism 11, a first color pass set 1, a second color pass set 2, a subsequent color pass set 3 and an output mechanism 12 in sequence on a main body 10, wherein the multicolor offset press is a flat paper 5-color press.

The printing was carried out as follows:

(1) preparing a printing plate according to the picture and text to be printed;

(2) preparing a multicolor offset press, filling UV gloss oil into a first color group 1 of the multicolor offset press, filling other color ink into a second color group 2 and subsequent third, fourth and fifth color groups as required, and mounting a printing plate on the second color group 2 and the subsequent third, fourth and fifth color groups of the multicolor offset press;

(3) and starting a printing process of the multicolor offset press, wherein the first color group 1 prints a layer of UV gloss oil on the surface of a printing stock, and the second color group 2 and the subsequent third, fourth and fifth color groups print the pictures and texts to be printed.

Example 2

The multicolor offset press selects a 4-color roll paper offset press, and performs printing according to the following steps:

(1) preparing a printing plate according to the picture and text to be printed;

(2) preparing a UV printing plate according to the picture and text to be printed, wherein the UV gloss oil area on the UV printing plate is slightly larger than the area of the picture and text to be printed;

(3) preparing a multicolor offset press, filling UV gloss oil into a first color group of the multicolor offset press, filling other color ink into a second color group, a second color group and a third color group of the multicolor offset press according to requirements, mounting a UV printing plate on the first color group, and mounting the printing plate on the second color group and the subsequent third color group and fourth color group of the multicolor offset press;

(3) and starting a printing process of the multicolor offset press, wherein the first color set prints a layer of UV gloss oil on the surface of a printing stock, and the second color set and the subsequent color sets print the to-be-printed picture and text.

In the embodiment of the printing method of priming by using the UV gloss oil, the first color set of the multicolor offset press is used for printing the UV gloss oil layer on the surface of the printing stock, which is equivalent to priming and covering the surface of the printing stock, and the subsequent color sets are used for printing the to-be-printed pattern and text, so that the surface roughness of the printing stock can be reduced, the problem of powder falling during printing is solved, the printing ink color is brighter and saturated, the UV gloss oil and printing process can be completed by the offset press at one time, the technical effect of mass and continuous production is achieved, and the requirements in production practice are greatly met.

Claims

1. A printing method using UV gloss oil for priming is characterized by comprising the following specific steps:

(1) preparing a printing plate according to the picture and text to be printed;

2. A method of priming printing with UV varnish according to claim 1, further comprising the step of preparing a UV cliche having UV varnish areas slightly larger than the area of the text to be printed, said UV cliche being mounted on the first pass of the offset printing press.

3. A printing method with UV varnish priming according to claim 1 or 2, characterized in that the multicolour offset printing press is a sheet-fed offset printing press.

4. A printing method with UV varnish priming according to claim 1 or 2, characterized in that the multicolour offset printing press is a web offset printing press.