JP2002211104A - Printing paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printing paper, which keeps an almost blank similar to an ordinary printing paper and allows to make the easy duplication and diversion of the intellectual property of a publisher difficult through the looming of logos of the publisher and comments of a purport for inhibiting a duplication without permission at the duplication with a duplicating machine. SOLUTION: This printing paper is formed by printing a background and a pattern on a white paper with dots having the density of 30 to 300 dots/in.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing paper which is difficult to use for copying. With the era of information and knowledge creating significant added value, the importance of intellectual property protection in corporations is increasing, and even when submitting proposals and reports to customers, There is a need to take measures to protect intellectual property such as copyright.

[0002]

2. Description of the Related Art Heretofore, as this type of printing paper, there has been known a printing paper in which a background pattern is provided in a background so that a pattern cannot be distinguished before copying.

[0003]

However, with this type of printing paper, it is difficult to make it close to blank paper, which is the same as ordinary printing paper, and it is unsuitable as a printing paper for submission to customers. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and its object is to maintain a state close to blank paper similar to that of ordinary printing paper, and to copy the original paper when copying by a copying machine. An object of the present invention is to provide printing paper that can make it difficult for the intellectual property of the publisher to be diverted easily by exposing the logo and a comment that prohibits unauthorized copying.

[0005]

According to the first aspect of the present invention,
It is characterized by printing a background and a pattern on a blank sheet of paper at 30 to 300 dots / inch halftone dots. The invention according to claim 2 is characterized in that, in the printing paper according to claim 1, the background is constituted by a point at which the copying machine cannot be identified, and the picture pattern is constituted by a point at which the copying machine can be identified.

According to a third aspect of the present invention, in the printing paper according to the first or second aspect, the background is 175 dots / dot.
It is characterized in that the density of the inch is 6%, and the pattern is 65 dots / inch with a density of 8%. About 1-500 dots / inch, which is the film density used for printing, can be created. Among these, the range that can be copied as a copy without visually feeling unnatural is 30 to 300 dots / inch.

Here, the background dots will be described.
At present, 500 dots / inch can be controlled (printing can be performed stably) at a fine point in normal printing. However, there is a random dot method which cannot be expressed by OO dots / inch even at present, and there is a point that OO dots / inch cannot be expressed.

From the above, the range of the background is set to 150 dots / inch to 500 dots / inch. The background density is 6% to 10%. Next, the picture dots will be described. It is said that the minimum size of a dot that cannot be copied by a normal copying machine is 150 dots / inch. If there is a technological change in copiers in the future, the numbers may change.
On the other hand, in terms of roughness, the dots used in newspapers are 65 dots / inch, and it is said that roughness is not visually noticeable.
If it is less than 30 dots / inch (it feels very rough), you can cover.

From the above, the range of the picture is set to 60 dots / inch to 150 dots / inch. The density of the picture is set to 8% to 12%. The most suitable combination using a generally used film is such that the density of the background (the point at which the copying machine cannot be distinguished) is 175 dots / inch and the pattern (the point at which the copying machine can be distinguished) is 65 dots / inch. This is a combination at a concentration of 8%.

According to the present invention, halftone dots in a range that does not seem unnatural to the naked eye are printed on blank paper in a combination of halftone densities (sizes and densities) that can be identified by a copying machine. Thus, it was possible to realize a mechanism that is suitable for use as printing paper that is normally used, and that allows a picture to emerge when passed through a copying machine. Therefore, when the printed matter using this printing paper is copied by a copying machine, the logo of the publisher and a comment stating that prohibition of unauthorized copying are raised, so that the intellectual property of the publisher is less likely to be diverted to copying. can do.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1A shows a printing paper 10 according to the present embodiment. This printing paper 10 can be subjected to printing 11 by printing in the same manner as ordinary printing paper.

When the printing paper 10 is set on a copying machine, as shown in FIG. 1B, a logo 21 of the publisher and a comment 23 to the effect of prohibiting unauthorized copying are raised. This logo 2
The comment 1 and the comment 23 are based on the fact that when the background 13 and the picture 15 are actually printed on an original plate made of a film, the density looks different depending on the dot density visually.

Here, the background 13 is, as shown in FIG.
175 dots (division) / inch (black area is 6 to
10%). As shown in FIG. 3, the pattern 15 has 65 dots (divided) / inch (the area of the black portion is 8 dots).
１２12%). Precise halftone dot control is required for printing so that the picture pattern cannot be actually discriminated, and there are four combinations shown in Table 1 when a general-purpose density film is used.

In Table 1, 175 dots /
In the case of a combination in which the density of inches is 6% and the density of a picture is 65 dots / inch and the density is 8%, the background is the limit to be copied whitest. In Table 1, the density of 175 dots / inch is 10% as the background, and 65 dots / inch as the pattern.
In the case of the combination with the density of 12% of inches, the background color becomes dark and the appearance becomes gray.

From the above results, it was found that a combination of a background with a density of 175 dots / inch at a density of 6% and a pattern with a density of 65 dots / inch at a density of 8% was most desirable.

[Table 1] According to the present invention, as a result of printing the background and the pattern, the pattern has a density that does not make the user feel uncomfortable as a print sheet and the pattern is hidden behind the background. Therefore, the combination can be created within the above range.

Although the present embodiment has been described with reference to the case where the printing paper 10 is put on a copying machine, the logo 21 of the publisher and the comment 23 prohibiting unauthorized duplication are raised. Not limited to this, printing can be performed in the same manner as normal printing paper, and then when the printed paper is applied to a copying machine, the copied paper becomes difficult to see due to the background and pattern previously applied to the printing paper itself. Or
It is possible to arbitrarily select the background and the pattern so that the printed print becomes illegible.

[0017]

According to the present invention, there is an advantage that it can be used as a material for submission to a customer or the like in the same manner as ordinary printing paper, and that the material cannot be easily copied. .

[Brief description of the drawings]

FIG. 1 shows a state (a) after printing using a printing sheet according to an embodiment of the present invention and a state (b) in which the printing sheet after printing is copied.

FIG. 2 shows a background of the printing paper of FIG. 1;

FIG. 3 shows a pattern of the printing paper of FIG. 1;

[Explanation of symbols]

 10 Printing Paper 11 Printing 13 Background 15 Design 21 Logo 23 Comments

Continuation of the front page (72) Inventor Yusuke Imai 8-2-1-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Office (72) Inventor Masahiro Shimada 2-3-5 Hamamatsucho, Minato-ku, Tokyo (72) Inventor Takeharu Ebihara 1-2-1 Higashi Tabata, Kita-ku, Tokyo F-term (reference) 2H034 FA03 2H113 AA03 CA34 CA39 CA40 CA44 EA05 EA10

Claims (3)

[Claims] 1. A printing paper comprising a background and a picture printed on a blank sheet of paper at 30 to 300 dots / inch. 2. The printing paper according to claim 1, wherein the background is constituted by a point at which the copying machine cannot be identified, and the picture pattern is constituted by a point at which the copying machine can be identified. 3. The printing paper according to claim 1, wherein the density of the background is 175 dots / inch, the density is 6%, and the pattern is 65%.
A printing paper comprising a dot / inch density of 8%.