JPH04290783A - Embossed screen printing - Google Patents

Abstract

PURPOSE:To provide embossed screen printing technique which is an improved screen printing method of giving a clear embossing effect and creating printed matter having a three-dimensional appearance. CONSTITUTION:Multi-color screen printing is performed using a 250-mesh or finer printing screen. In addition, a 150-mesh or coarser output solid printing screen is used for an embossed print. Thus an embossed screen printing technique by which multi-color print is obtained is realized.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raised printing method using screen printing. More specifically, the present invention relates to a screen printing method that has an excellent bulge effect, in which screen printing is performed using a process plate with a fine mesh as a main plate, and then screen printing is performed using a solid cutout plate with a coarse mesh.

0002

BACKGROUND OF THE INVENTION A screen printing method has been known as a printing method having a raised effect. As a printing method that produces a raised effect with this printing method, (1) multicolor printing such as four-color printing is performed using process ink using a printing plate with the same mesh, and then multicolor printing is performed on top of this using the same printing plate. (2) A printing method is known in which spot printing is performed using transparent clear ink using a screen printing plate on the pattern part of an offset printed matter (multicolor printing using process inks).

However, in the screen printing method using printing plates of the same mesh, the amount of ink ejected by the screen printing plates used hardly changes, so the heaping effect is not satisfactory. In addition, in the screen printing method in which spot printing is performed on the pattern area, although an improvement in the gloss of the pattern area was observed, the effect of raising the image was not satisfactory.

[0004] Also, a method using a cutout plate is known as a screen printing method. This printing method is a printing method in which clear ink is spot-coated on areas of a color printed matter that are desired to be raised. Although this method allows relatively clear color printed matter to be obtained, almost no bulging effect is observed.

An object of the present invention is to provide a raised printing method using screen printing, which can produce printed matter that is clear and has an excellent raised effect by improving the screen printing method.

[Means for Solving the Problems] The present invention performs multicolor screen printing using a fine screen plate of 250 mesh or more, preferably 300 mesh or more as a main plate,
Next, 15, which is a solid cutout version, is used as a lively part.
To provide a raised printing method by screen printing, which comprises performing multicolor screen printing using a coarse screen plate of 0 mesh or less, preferably 100 mesh or less.

[0006] In the raised printing method of the present invention, both the first color screen printing and the second color screen printing are performed in three colors of yellow, red, and indigo, and four-color printing with black added as necessary. However, the present invention is not limited to these, and any multicolor printing may be performed.

[0007] In plate making for the main plate, a positive film is prepared for each color using a plate making scanner, and a screen plate is prepared using the positive film by a normal plate making method. A solid cutout plate is also made in the same manner as above.

The photosensitive emulsion used in plate making is not particularly limited, such as photopolymerizable emulsions and diazo type photoemulsions, but photopolymerizable emulsions are used from the viewpoint of ease of uniform thick film coating on coarse mesh screens. Light-sensitive emulsions are preferably used. Photopolymerizable emulsions are particularly preferred for solid cutout plates, which play an important role in producing a raised effect.

The ink used for printing is not particularly limited as long as it is normally used in screen printing, such as ultraviolet curable ink and thermal polymerization ink. In addition, it is preferable to use process ink as the ink for the main plate, and as the ink for the solid cutout plate, it is preferable to use one that can produce a heaving effect without impairing the halftone gradation of the printed matter. For example, pale yellow, red, It is indigo. Light color inks usually contain pigments or dyes in an amount of 20% by weight or less, preferably 5% by weight or less, compared to the process ink.

[0010] The printing material may be anything to which ordinary screen printing can be applied, and is not particularly limited, but is generally paper, plastic, metal, etc. Printing may be carried out using a conventional automatic or semi-automatic printing machine.

[0011]

EXAMPLES The present invention will be explained in more detail based on the following examples.

0012

[Example 1] A manuscript was subjected to photolithography using a scanner, and printing plates for main plates in four process colors and printing plate films for solid cutting in yellow, red, and indigo were prepared. 3 from this film
A 05 mesh main version and a 70 mesh solid cutting version were created. Color printed matter was produced on paper using an automatic screen printer using a main plate and process ink (UV curable ink No. 21000, manufactured by Toyo Ink Manufacturing Co., Ltd.). Next, printing was performed using a solid cutting plate using an ink containing 2% by weight of the process ink added to a transparent curable ink. In addition, each color was irradiated with ultraviolet rays to dry and cure.

The obtained printed matter was clear and had an excellent raised effect with a raised thickness of 300 μm or more.

[0014]

Effects of the Invention According to the present invention, the ink film thickness by screen printing is approximately 20 μm, whereas the usual ink film thickness is approximately 12 μm.
A printed matter having a film thickness of 0 μm or more is provided. Further, according to the present invention, a printed matter is provided that is clear and has a three-dimensional effect with an excellent heaping effect.

Claims (2)

[Claims] Claim 1: Multicolor screen printing is performed using a fine screen plate of 250 mesh or more as the main plate, and then a solid cutout plate of 150 mesh is used as the raised part.
A raised printing method using screen printing that involves performing multicolor screen printing using a coarse screen plate with a mesh size or smaller. [Claim 2] After carrying out screen printing using a fine screen plate consisting of 3 or 4 plates of yellow, red, indigo, and black as necessary, 2. The raised printing method by screen printing according to claim 1, wherein the screen printing is performed using a rough screen plate consisting of four plates.