JPS60224574A - Printing method - Google Patents

Abstract

PURPOSE:To make it possible to print images with excellent light resistance, by a method wherein a positive comprising specified halftone dots and conforming to each color tone is produced from a color film obtained by photographing an object to be printed, by a scanner, further a machine plate is produced from the positive, and printing in an opaque ink is conducted. CONSTITUTION:The positive comprising halftone dots not more than those for producing an offset machine plate and not less than those for producing a silk screen machine plate or a photogravure machine plate and conforming to each color tone is produced from the color film obtained by photographing the object to be printed, by using the scanner, then the machine plate conforming to each color tone is produced from the positive, and printing is conducted by using the so-called opaque ink. When printing on a blank material such as a nonwoven fabric is conducted by using the so-called opaque ink, images can be printed with excellent reproducibility and light resistance in the same manner as in a silk screen printing method. The printed surface thus obtained has excellent light resistance and clearness as characteristics of a silk screen printing ink, and fading will not occur.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing method for printing clear patterns by gravure printing or offset printing using display ink or silk screen printing ink.

It is well known that ink that belongs to the so-called transparent ink is used for printing using the gravure printing or offset printing method, and that ink that belongs to the so-called opaque ink is used for printing VC using the silk screen printing method61. In addition, the yellow and red transparent inks used in gravure printing and offset printing methods have particularly low light resistance.
Therefore, when making plywood using printed matter printed using the above-mentioned method, the ink causes color fading due to the adhesive, making it difficult to make ideal plywood.

On the other hand, printing V using the silk screen printing method VC
For r-, an ink belonging to the so-called opaque ink is used, and the above-mentioned disadvantages can be prevented, but
It is said that printing is inferior to gravure printing or offset printing because of the rough halftone dots in the finished printed matter.

Furthermore, printing on non-woven fabrics, synthetic resin sheets, and metal sheets was thought to be possible only by transfer t-silk screen printing.

The present invention makes use of the advantages of silk screen printing ink and uses it to perform gravure printing or 7-set printing, which is excellent in terms of color reproducibility and clarity. It is possible to print color designs on the above-mentioned materials, eliminating the defects of the designs.

This will be explained below.

Color film 1 of the subject is photographed using a scanner to create each color tone, with halftone dots smaller than the positive used to make an offset printing plate and larger than the positive used to make a silk screen printing plate or gravure printing plate. Using this positive to create a printing plate that matches each color tone), printing is performed using the printing plate using ink that belongs to a class called opaque ink.

Since each printing plate used in the present invention is constructed as described above, the so-called opaque ink used for silk screen printing also adapts to the printing plate constructed as described above.

With this, printing is performed according to a conventional method.

When printed on recording materials, it is possible to print designs with excellent reproducibility and light resistance, similar to printing by silk screen printing.

As a result, the sharpness of the design obtained by the screen printing method can be achieved, and fine-grained printing can be achieved by the gravure or offset printing method.

Furthermore, the above-mentioned printed surface has excellent light resistance and sharpness, which is a characteristic of the silk screen printing ink, and therefore the color does not fade.

In addition, the above ink is resistant to the adhesive used when making plywood panels, so when printing using the above printing method and making building materials or household goods using circular prints, the color will not run even if it is bonded to a synthetic resin board with an adhesive. It will not cause any problems.

The above explanation of ink is based on printing using silk screen ink; however, the same results can be obtained by using display ink, which belongs to a category called opaque ink. It has been found.

Claims (1)

[Claims] The color film of the subject is photographed using a color separation machine (scanner), and the halftone dots are offset or less than the positive to make a gravure printing plate, and the halftone dots are more than the positive to make a silk screen printing plate. Did you press it together? -) is made, and using this positive, the entire printing plate is made to match the desired color tone, and all printing is performed using the above printing plate using an ink that belongs to a category called so-called opaque ink. printing method