JPH091773A - Intaglio offset printing - Google Patents

Abstract

PURPOSE: To prevent deterioration of printing properties without impairing mass productivity of intaglio offset printing. CONSTITUTION: After dropping ink 7 on an intaglio 1 by using a dispenser or the like, the ink is uniformly filled in an intaglio cell la formed in a required pattern and depth with a squeegee. Then, a roll is rolled on the intaglio to transfer the ink 7 from the intaglio. At that time, a part of the ink is of a state of remaining in the intaglio cell 1a (a residue of the ink 8). Though the intaglio cell is uniformly filled by adding freshly new ink in that state, since drying of the remaining ink gradually advances, printing properties are gradually deteriorated. In order to prevent that, after removing thoroughly the remained ink 8 in the intaglio cell 1a with a rubber squeegee of urethane or the like as component, when printing is carried out by filling new ink 7, fine pattern printing of excellent printing properties can be carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intaglio offset printing method, and is particularly suitable for a fine pattern forming method.

[0002]

2. Description of the Related Art Generally, there are printing methods such as letterpress, planographic printing, intaglio printing and screen printing depending on the shape of the printing plate. Among them, the intaglio printing method enables extremely precise printing as compared with other printing methods, and enables printing from an extremely thin width of about 20 μm to a thick width of about 1 mm.

Further, the intaglio offset printing method is a method in which grooves or recesses formed in a desired pattern and depth are formed on an intaglio substrate.
(Hereinafter, referred to as an intaglio cell) After uniformly filling the ink with a supply squeegee, the ink in the intaglio cell is once transferred onto the roll by rolling on this intaglio with a roll wrapped with silicon rubber or the like. Further, by rolling this roll on the substrate to be printed, the ink is transferred onto the substrate to be printed and printing is performed.

FIG. 3 shows an example of a conventional intaglio offset printing method, and FIG. 4 is a sectional view of an intaglio plate showing a state where ink is filled in intaglio cells by the intaglio offset printing method of FIG. First, the ink 7 is dropped on the intaglio plate 1 using the dispenser 2 shown in FIG. 3, and then the ink 7 is uniformly filled in the intaglio cell 1a with the ink supply squeegee 3 as shown in FIG. Next, the roll 5 is rolled on the intaglio plate 1, and the ink 7 is transferred from the intaglio plate 1. At this time, as shown in FIG. 4 (b), a part of the ink 7 is left in the intaglio cell 1a (ink remaining 8).

Further, by rolling the roll 5 on the substrate 6, the ink 7 on the roll 5 is transferred to the substrate 6 for printing. When printing is repeated in this state, the ink 8 left in the intaglio cell 1a gradually dries as shown in FIG. 4 (b), and thus a fresh ink 7 is newly added as shown in FIG. 4 (c). Is uniformly filled on the remaining ink 8, but the printability gradually deteriorates.

[0006]

As described above, in the intaglio offset printing method, the ink 7 filled in the intaglio cells formed in the required pattern is not all transferred to the roll during printing, and the ink 7 As the ink remains in the intaglio cells as the ink 8, the ink 8 left in the intaglio cells is naturally dried as the number of printings is increased, and the remaining and dried ink 8 is newly supplied. There is a problem in that the ink 7 is adversely affected and the printability gradually deteriorates when printing is continued.

In order to prevent this, it is conceivable to remove the ink 8 left in the intaglio cell. As an example of this, the method of removing the ink 8 by immersing the intaglio plate in a solvent or the like is extremely effective. It takes time and is not suitable for mass production.

[0008] The present invention solves the above problems,
The purpose is to easily remove unnecessary ink left in and on the intaglio cell without impairing mass productivity.

[0009]

In order to achieve the above-mentioned object, the present invention removes and removes ink left in an intaglio cell and on an intaglio plate by a rubber-like flexible squeegee to remove the ink in the intaglio cell and the intaglio plate. It is intended to remove the ink above.

[0010]

According to the present invention, the ink left in the intaglio cell and on the intaglio plate can be completely removed, and the deterioration of the printability caused by the drying of the ink left can be prevented. Further, since it can be performed very easily, it can be introduced without impairing mass productivity.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an intaglio offset printing method in one embodiment of the present invention, and FIG. 2 is a sectional view of an intaglio printing plate showing an operation process of the intaglio offset printing method. Explain. First, as shown in FIG. 1, the ink 7 is dropped onto the intaglio plate 1 using a dispenser 2 or the like, and then the ink 7 is uniformly distributed in the cells 1a of the intaglio plate 1 by the ink supply squeegee 3 as shown in FIG. 2 (a). Fill.

Next, the roll 5 is rolled on the intaglio plate 1 to form an intaglio plate 1.
The ink 7 is transferred. At this time, a part of the ink 7 is left as the ink 8 in the intaglio cell 1a as shown in FIG. These printing methods are the same as conventional ones. In this embodiment, after the ink 7 is supplied to the roll 5, as shown in FIG. 2 (b), the remaining ink 8 is removed as shown in FIG. Complete removal. At this time, the ink remaining on the intaglio plate 1 is also scraped off. After this, from the ink supply squeegee 3 to FIG.
As shown in (d), ink 7 is newly filled and printing is performed. According to this example, it was confirmed that the intaglio offset printing method enabled continuous printing of fine patterns with good printability.

The rubber hardness of the rubber squeegee 4 is
If it is too hard, the remaining ink 8 cannot be completely removed because it does not follow the cross-sectional shape of the intaglio cell 1a, and ink remains in the intaglio cell, and if it is too soft, the ink scraping property deteriorates. Ink remains in a film form on the entire surface of the intaglio plate. Therefore, the rubber hardness of the rubber squeegee 4 is 50 to 90.
It was confirmed that the degree is desirable.

[0014]

As described above, in the intaglio offset printing method of the present invention, the ink remaining in the intaglio cells is completely scraped off and scraped off by the rubber-like flexible squeegee to remove the ink in the intaglio cells and the intaglio plate. It is intended to be easily cleaned, thereby preventing deterioration of printability. When this printing method is adopted, a low cost printed matter is realized without impairing the original mass productivity of the printing method.

[Brief description of the drawings]

FIG. 1 is a diagram showing an intaglio offset printing method according to an embodiment of the present invention.

FIG. 2 is a sectional view of an intaglio showing an operation process of the intaglio offset printing method of the present invention.

FIG. 3 is a diagram showing an example of a conventional intaglio offset printing method.

4 is a sectional view of an intaglio plate showing a state where ink is filled in an intaglio cell by the intaglio offset printing method of FIG.

[Explanation of symbols]

1 ... Intaglio, 1a ... Intaglio cell, 2 ... Dispenser,
3 ... Ink supply squeegee, 4 ... Rubber squeegee, 5
... Roll, 6 ... Substrate, 7 ... Ink, 8 ... Ink residue.

Claims (1)

[Claims] 1. An intaglio offset printing method, characterized in that ink existing in cells on an intaglio plate formed into a required pattern shape is removed by a rubber-like squeegee having a flexibility of rubber hardness of 50 to 90 degrees.