JPH0361574A - Method for printing fine pattern - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of printing fine patterns by intaglio offset printing.

[Conventional technology]

Traditionally, intaglio offset printing has been suitable for printing fine patterns, such as manufacturing color filters for LCD color televisions in which the three primary colors red, green, and blue are arranged in stripes or mosaic patterns on a glass substrate. It is used in cases.

[Problem to be solved by the invention]

By the way, when manufacturing the above-mentioned color filter, the respective red, green, and blue inks are transferred in a striped or mosaic pattern in close proximity to a glass substrate, and the red, green, blue, red, green, ...is printed as an array. And in this printing, alignment marks are printed at the same time as in normal color printing,
This alignment mark is used for positioning the transfer of the next color.

However, on the effective plate surface side of the plate, the ink is in a dense state after doctoring and from the plate surface to the blanket circumferential surface of the blanket cylinder, as described above, whereas the cell part for alignment marks on the plate is in a dense state after doctoring. Because it stands alone on the subsequent printing plate and the blanket surface transferred from the printing plate without placing the same ink around it,
Until the ink is transferred onto the glass substrate, the change in the drying state of the ink from the effective plate side and the change in the drying state of the ink from the alignment mark cell portion are not the same. In other words, there is an inconvenience that the ink from the cell part for the alignment mark on the printing plate and blanket dries faster, and therefore defects such as smudges are transferred onto the glass substrate. It was easy to occur.

Also, for the ink transferred onto the glass substrate, the degree of drying is different between the ink from the effective plate side and the ink for the alignment mark due to the above reasons, which also causes printing defects of the alignment mark. there were.

Therefore, the present invention eliminates the transfer defect of the ink forming the alignment mark from the blanket to the glass substrate.
The purpose is to obtain reliable alignment marks.

[Means to solve the problem]

The present invention has been made in consideration of the above problems, and when performing intaglio offset printing, the depth of the cell portion of the plate corresponding to the alignment mark is deeper than the depth of the cell portion of the effective plate surface of the plate. In addition, the present invention provides a fine pattern printing method characterized by the following: When performing intaglio offset printing, the blanket thickness of the blanket cylinder corresponding to the alignment mark is changed to the blanket thickness of the blanket cylinder corresponding to the effective printing surface of the plate. The object of the present invention is to provide a method for printing fine patterns characterized by thicker patterns, thereby solving the above problems.

[For production]

In the present invention, the transferability of ink from the cell portion of the plate corresponding to the alignment mark to the blanket of Prankera) is improved, and the ink is transferred to the blanket in a thick layer.

〔Example〕

Next, a detailed explanation will be given based on the embodiment shown in FIGS. 1 and 2.

In the figure, 1 is an intaglio offset printing plate for fine pattern printing, and the cell part 2 for alignment marks of the plate 1 is provided with a depth 2a deeper than the depth 3a of the cell part 3 on the effective plate surface. ing. The plate 1 is then inked, the ink is transferred from the plate 1 to the peripheral surface of the blanket 5 of the blanket cylinder 4, and the ink is transferred from the blanket 5 onto a glass substrate (not shown). The ink in the cell part 2 transfers to the blanket 5 in a thicker layer than the ink in the cell part 3 on the effective plate surface, and after being transferred onto the blanket surface or a glass substrate (not shown), it transfers from the effective plate side. It is provided so that the state of change is similar to that of the ink.

FIG. 2 shows another embodiment, in which the thickness 6a of the portion 6 corresponding to the cell portion for the alignment mark is the same as the thickness 7 of the portion 7 corresponding to the cell portion of the effective plate surface.
(The depth of the cell portion for the alignment mark is the same as the depth of the cell portion for the effective plate surface.)

After inking, the ink is transferred from the plate 1 to the corresponding portions 6 and 7 of the blanket 5, and transferred from the blanket 5 onto the glass substrate. The transferability of the ink increases to the corresponding portion 6 where the blanket thickness is small, and the ink transfers in a thick layered state, and after being transferred onto the blanket surface or the glass substrate (not shown), it is the same as ink from the effective plate side. As a result, printing defects of alignment marks on the glass substrate will not occur.

In the above-mentioned embodiment, the depth of the cell portion forming the alignment mark was increased, or the thickness of the corresponding portion of the cell portion for the alignment mark was increased in the blanket. It may be adjusted so that an appropriate amount of ink is transferred.

〔Effect of the invention〕

As explained above, according to the present invention, when performing intaglio offset printing, the depth of the cell portion of the plate corresponding to the alignment mark is set to be deeper than the depth of the cell portion of the effective plate surface of the plate, and the alignment Since the blanket thickness of the blanket cylinder corresponding to the mark is made thicker than the blanket thickness of the blanket cylinder corresponding to the effective plate surface of the plate, the ink forming the alignment mark is transferred to the blanket in a thick layer, and the ink after transfer is The ink of this alignment mark on the glass substrate and the ink of the effective plate surface are in the same state of change, and printing defects of the alignment mark are eliminated, resulting in excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the fine pattern printing method according to the present invention, and FIG. 2 is an explanatory diagram showing another embodiment. 1...Version 2.3...Cell part 4...Blanket body 5...Blanket 6.7...Corresponding part Fig. 1 Figure 2

Claims (2)

[Claims] (1) In performing intaglio offset printing, a method for printing fine patterns, characterized in that the depth of the cell portion of the plate corresponding to the alignment mark is made deeper than the depth of the cell portion of the effective plate surface of the plate. (2) In performing intaglio offset printing, a fine pattern printing method characterized in that the blanket thickness of the blanket cylinder corresponding to the alignment mark is made thicker than the blanket thickness of the blanket cylinder corresponding to the effective printing surface of the plate.