JPS6148419B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a direction for producing a mimeograph plate for two-color printing using two sheets of manuscript paper.

There is a plate-making machine for mimeograph machines called a fax, and the principle behind this is that light emitted from a light source lamp is applied to the original through a lens, and a phototube converts the reflected light into the strength of an electric current depending on the shading of the original. This is then enlarged and used to create a plate by making minute holes in the vinyl base paper using an electrical discharge phenomenon at the tip of a recording stylus. Therefore, a colored light source cannot sufficiently detect the difference between a highly reflective pen, such as a yellow felt-tip pen, drawn on a white original with a colored light source. By taking advantage of this fact, we are attempting to produce a mimeograph plate for two-color printing using a small number of manuscripts.

FIG. 1 shows a conventional method for making a two-color original, a plate-making method, and a printing process. The drawings enclosed in dotted lines in FIG. 1 show the original manufacturing process. First, A in Figure 1 is a drawing of the original draft assuming the finished product after printing, and B in Figure 1 shows the first color of the manuscript being produced, with the text ``Notice'' and a photo written on it. ing. These letters and photographs are black because the letters are drawn using a black felt-tip pen and the photographs themselves are used. Next, based on A in FIG. 1, the word "News" is drawn in, for example, "red" on the third manuscript. B is actually used as a manuscript.
and C. When such a manuscript is applied to the original plate making machine 5, a vinyl base paper 6 is produced as described above. One is the base paper for black and the other is the base paper for red.

When this base paper is printed on a rotary copying machine 7, the black portion is printed first, resulting in a number 8. Next, in order to print the red part, the base paper for the "red" part is attached to the rotary copying machine 9, and when the paper on which the black part has been printed is hung on the mimeograph machine, a printed matter 10 in which black and red are mixed is produced. climb.

As described above, in the conventional method, three original sheets are required for five-color printing: A as the original draft, B as the black part, and C as the red part. Further, there were drawbacks such as difficulty in printing a finished product in which the first color and the second color overlapped or were separated from each other more than necessary.

The present invention eliminates the drawbacks of the conventional method and allows anyone to quickly and inexpensively perform beautiful two-color printing.By using, for example, yellow, which has a high reflectance, "yellow" is printed instead of "red" in the original draft of A. The aim is to reduce the number of original pages by one by using .

The invention will now be described with reference to FIG. As shown in Figure 2A, on a document that you want to print in two colors, for example, draw "Notice" or a photo in the first color with a black felt-tip pen, which has a low reflectance, and then draw the text such as "News" in the second color with a high reflectance. The first document 11 is drawn with a felt-tip pen of a high color, for example, yellow. If this is directly applied to the original plate making machine, only black, which has a low reflectance, will be detected and made into the vinyl base paper, so that an original plate 12 of only the first color will be completed. Characters such as ``News'' are blanked out because they cannot be detected.

Next, create a second color original using the method shown in Figure 2B.
Specifically, a transparent paper 13 is placed on top of the original prepared in FIG. 2A, and the yellow portion is copied in red, which has a low reflectance. Now the second color original 1
4 is completed, this is applied to an original plate making machine to create an original plate, and an original plate 15 of the second color is completed. As the paper 13, a transparent plastic film original paper as shown in FIG. 3 is used. This paper has a center line 16, paper size 17, markings, etc. printed on a film that is one size larger than the effective area using highly reflective ink. Paper 13 to paper 1
1, it is possible to add characters, etc. while checking the overlapping of sheets, color misalignment, etc. during manuscript creation.

Although mimeograph printing has been used for a long time, multicolor printing has not been widely used. This is partly because it is difficult to operate the printing press, etc., but also because plate making is difficult.
Printing was often left to printers.

Recently, speed and low cost have been reconsidered,
It was widely used for advertisements in newspaper inserts in supermarkets, etc., and there were many requests for multi-color printing. The present invention addresses this need.

First, the number of manuscripts I write has decreased from three to two. Furthermore, the first color and the second color do not overlap or separate, making it easy to print and create an original plate. The use of transparent plastic film paper has the advantage that if water-soluble ink is used, it can be reused by wiping it off with a wet cloth.

Also, in the present invention, the original is the first color original, but without creating an original, the first color is directly written on a transparent base paper, and then another base paper is overlaid, and the second color is written while maintaining harmony with the first color. It is possible to create an original plate that can be printed in any number of colors by marking the colors, and conversely, it is possible to add or modify the first plate by overlaying the first plate on the second plate.

[Brief explanation of the drawing]

FIG. 1 shows a conventional method for making a mimeograph plate for two-color printing and a printing method, FIG. 2 is an explanatory diagram showing a method for making a mimeograph plate for two-color printing according to the present invention, and FIG.
The figure is a plan view of a document sheet made of transparent plastic film. 5...Original plate making machine, 11...First manuscript, 12
...original plate, 13...transparent paper, 14...second color original, 15...original plate.

Claims (1)

[Claims] 1. On the first sheet of paper, draw a document with the same shape as after printing using two colored writing utensils with large differences in reflectance, and use this as the first color document. A second sheet of paper with a high reflectance is placed on top of the first sheet, and the portion drawn on the first sheet with a writing instrument with a high reflectance is copied with a writing instrument with a low reflectance to form a second color manuscript. A two-color printing mimeograph master production method characterized in that a two-color mimeograph master is created by separately applying a color original and a second color original to a copying plate-making machine.