JPH0390357A - Printing of fine pattern - Google Patents

Abstract

PURPOSE:To prevent a blanket from becoming deformed significantly by moving a material to be printed by a specified pitch at a time with respect to a platen blanket, to which ink by an amount corresponding to a single image line or two image lines has been transferred through contact with the surface of a printing plate, and thereby printing the material from the platen blanket. CONSTITUTION:Ink supplied to a printing plate 2 drops to a platen blanket 1 adjacent to the plate 2, and a material to be printed 3 takes its position under the blanket 1, replacing the printing plate 2 after the ascent of the blanket 1. The blanket 1 again descends to transfer ink to the material 3. An ink cell part 4 corresponding to a single image line of a fine pattern is provided on the printing plate 2. Ink corresponding to a single image line is used for printing by transferring R ink (a) to the material 3 from the ink cell part 4. Thus printing is performed on the material 3 at a constant pitch P. Then G ink and B ink are used for printing with a shift of single image line thus obtaining a fine pattern.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the printing of fine patterns consisting of lines of multiple colors;
For example, the present invention relates to a printing method for manufacturing color filters used in color liquid crystal display devices.

[Conventional technology]

Traditionally, intaglio offset printing has been suitable for printing extremely fine patterns, such as color liquid crystal display devices in which the three primary colors red, green, and blue are sequentially arranged in stripes or mosaic patterns on a glass substrate. It is used when manufacturing color filters.

When manufacturing this color filter, as shown in FIG. 7, R (red), G (green), and B (blue) inks 12 are printed in stripes on a glass substrate 11 by intaglio offset printing. It is printed in a very thin form (the ratio of vertical and horizontal in the illustration is changed to make it easier to understand). This printing uses an integrated intaglio plate with a plate depth (ink cell depth) of 10 μm, for example, and applies the first color ink to the glass substrate 11 through a cylindrical blanket 13.
Next, the intaglio plate is used to print a second color ink, and the same intaglio plate is used to print a third color ink to produce a color filter (see Figure 6 WA).
).

[Problem to be solved by the invention]

However, in the above-mentioned method of intaglio offset printing, while the blanket landed on the glass substrate rotates,
Since the ink is transferred by contacting the printing material moving in the lateral direction (horizontal direction) under pressure, the glass substrate deforms due to this pressure. Especially when the glass substrate is large, the amount of deformation is large, and the accuracy ± The above-mentioned color filter, which requires a thickness of 16 μm, has a problem in that the required accuracy may not be satisfied.

Therefore, the present invention aims to prevent large deformation of the blanket during ink transfer in intaglio offset printing, and to obtain an appropriate fine pattern.

[Means to solve the problem]

The present invention has been made in consideration of the above-mentioned problems, and is used for intaglio offset printing of a fine pattern consisting of a plurality of lines of different colors in a pitch pattern in order on a substrate such as a glass substrate. Printing from the flat pressure blanket to the printing material by moving the printing material by a predetermined pitch to the flat pressure blanket to which one stroke of ink or two or more strokes of ink at a pitch interval has been transferred. This solves the above problem.

[For production]

In the present invention, the printing material is moved by a predetermined pitch each time the ink is transferred, and the ink is printed on the printing material at a constant pitch, and this is printed with a shift of one stroke for each ink of a different color. , a fine pattern is obtained by sequentially forming a pitch pattern of a plurality of drawing lines of different colors.

〔Example〕

Next, the present invention will be explained in detail based on the embodiments shown in FIGS. 1 to 5.

That is, in the present invention, the printing plate 2, which is supported in a horizontally movable manner, is positioned below the flat pressure blanket 1, which is supported in a vertically movable manner, at the time of ink transfer. It is carried out using an intaglio offset printing machine which is positioned downward during ink transfer, and the ink supplied to the plate 2 descends and transfers to the flat pressure blanket 1 in contact with it, and the flat pressure blanket 1 rises. Afterwards, a substrate 3 to be printed is placed below the plate 2, and the flat pressure blanket 1 is lowered again to transfer the ink to the substrate 3.

The plate 2 is provided with an ink cell portion 4 for one stroke of the fine pattern. For example, by transferring the R ink a transferred from this ink cell portion 4 onto the printing material 3, Ink is printed, and printing is performed on the substrate 3 at a constant pitch P. Then, a fine pattern can be obtained by printing in the same manner with G ink and B ink shifted by one stroke width. In addition, in the intaglio offset printing machine used for this printing, the plate side and the print substrate side are moved, but a printing machine in which printing is performed by moving a flat plate blanket may also be used.

In the above-mentioned embodiment, ink for -printing lines is printed with a constant pitch P, but a plate having ink cell portions corresponding to two or more drawing lines is used, and two printing lines are printed. Alternatively, ink corresponding to eight or more lines may be printed at a predetermined pitch.

〔Effect of the invention〕

As explained above, according to the present invention, when intaglio offset printing is performed on a printing substrate such as a glass substrate with a fine pattern consisting of a plurality of drawing lines of different colors arranged in a pitch pattern, surface contact is made with the plate. The printing material is moved by a predetermined pitch to the flat pressure blanket to which the ink of a stroke or two or more strokes of ink at the pitch interval has been transferred, and printing is performed from the flat pressure blanket to the printing material. The pressure applied to the blanket is small, the deformation of the blanket is small, and an appropriate fine pattern can be obtained, which has excellent practical effects.

[Brief explanation of drawings]

1 to 5 show an embodiment of the fine pattern printing method according to the present invention, FIG. 1 is an explanatory diagram showing the state before ink transfer, and FIG. 2 is an explanatory diagram showing the state at the time of ink transfer. figure,
FIG. 3 is an explanatory diagram showing after ink transfer, FIG. 4 is an explanatory diagram showing ink transfer, and FIG. 5 is an explanatory diagram showing after ink transfer.
FIG. 6 is an explanatory diagram showing a conventional example, and FIG. 7 is an explanatory diagram showing a color filter. ! ...Flat pressure blanket 2 ... Plate 3 ... Printing substrate 4 ... Ink cell section

Claims (1)

[Claims] When intaglio offset printing is performed on a substrate such as a glass substrate with a fine pattern consisting of multiple lines of different colors arranged in a pitch pattern in order, the plate is joined face-to-face with ink for one line or two lines at pitch intervals. 1. A fine pattern printing method characterized by moving the printing material by a predetermined pitch with respect to a flat-pressure blanket onto which more than a minute's worth of ink has been transferred, and printing from the flat-pressure blanket onto the printing material.