Pad printing method

Abstract

Provided is a transfer printing method capable of performing transfer printing of a multicolor pattern by a simple printing step. The pad printing method is a method for transferring a printing pattern to a printing object by bringing an ink-adhered pad head into contact with the printing object, and includes: a pattern creation step of color-decomposing the color of the final printing pattern into at least C (cyan), M (magenta), and Y (yellow), the printing patterns of all the colors are manufactured into dot patterns; a first transfer printing step, wherein the printing pattern of the color C is transferred to a printing object through a transfer printing rubber head; a second transfer printing step, wherein the printing pattern with the M color is transferred to the printing object through a transfer printing rubber head; and a third transfer printing step: transferring the printing pattern of the Y color to the printing object through a transfer printing rubber head.

Description

TECHNICAL FIELD

[0001] The present application relates to a pad printing method, and more particularly to a pad printing method of a multicolor pattern. BACKGROUND

[0002] Conventionally, pad printing is performed by, for example, as described in Patent Literature 1, attaching ink to a pad and pressing the pad against a print target to transfer the ink to perform printing. In the case of performing multicolor printing, patterns of respective colors are attached to the pad to perform transfer.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2022-94837 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, in the pad printing described above, a number of pad printing processes equal to the number of colors are required to perform the transfer process, and the number of printing processes increases. An object of the present application is to provide a pad printing method capable of performing pad printing of a multicolor pattern by a simple printing process.

[0008] SOLUTION TO THE PROBLEM

[0009] To achieve the above object, a pad printing method in which a pad to which ink is attached is brought into contact with a print target to transfer a print pattern onto the print target is characterized by comprising: a pattern making step of color-decomposing a color of a final print pattern and decomposing the color into at least C (cyan), M (magenta), and Y (yellow) to make a print pattern of each color as a dot pattern; a first transfer step of transferring the print pattern of the C color onto the print target by the pad; a second transfer step of transferring the print pattern of the M color onto the print target by the pad; and a third transfer step of transferring the print pattern of the Y color onto the print target by the pad.

[0010] In the present application, it is preferable that the pattern making step include making a print pattern of K color (black) as a dot pattern, and the pad printing method further include a fourth transfer step in which a print pattern of the K color is transferred onto the print target by the pad.

[0011] In the present application, it is preferable that the pattern making step include setting a diameter of a dot of the print pattern to 0.05 mm or less. In the present application, it is preferable that the pattern making step include changing the diameter of the dot of the print pattern according to a density of the color.

[0012] In the present application, it is preferable that, in the pattern making step, dot patterns are made in a state where printed patterns of each color are given angles with respect to each other.

[0013] In the present application, it is preferable that, in the pattern making step, printed patterns are made using a translucent ink and taking color mixing into consideration. In the present application, it is preferable that, in the pattern making step, printed patterns are made using an opaque ink and in such a manner that dot patterns of various inks do not overlap.

[0014] Effects of the Invention

[0015] In the present application thus configured, printed patterns of each color are made by dividing the color of the final printed pattern into at least CMY, and therefore it is not necessary to make patterns for each color as in the past, and the printing process is simplified. In addition, in the pattern making step, printed patterns are made as dot patterns, and therefore gradation expression is also possible, and high-quality printing is possible. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a view showing a pattern making process according to an embodiment of the present application.

[0017] Figure 2 is a view showing a dot pattern making process of the pattern making process according to an embodiment of the present application.

[0018] Figure 3 is a view showing a part of a dot pattern according to an embodiment of the present application.

[0019] Figure 4 is a view showing a pad printing process according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] Hereinafter, a preferred embodiment of the present application will be described with reference to the drawings. Figure 1 is a view showing a pattern making process according to an embodiment of the present application. As shown in this Figure 1 In the pattern making process, the color of a final printed pattern 1 expressed in a plurality of colors is divided into patterns 2, 4, 6, 8 of each color of C (cyan), M (magenta), Y (yellow), and K (black).

[0021] Figure 2 is a view showing a dot pattern making process of the pattern making process according to an embodiment of the present application, Figure 3 is a view showing a part of a dot pattern according to an embodiment of the present application. As shown in this Figure 2As shown, the decomposed patterns 2, 4, 6, 8 of each color are arranged so as to have an angle therebetween. In this embodiment, the pattern 2 of the color C is set to a pattern 10 in a state rotated 75° counterclockwise from the horizontal direction X, the pattern 8 of the color K is set to a pattern 12 in a state rotated 45° counterclockwise from the horizontal direction X, the pattern 6 of the color Y is set to a pattern 14 in a state rotated 45° counterclockwise from the horizontal direction X, and the pattern 4 of the color M is set to a pattern 16 in a state rotated 15° counterclockwise from the horizontal direction X.

[0022] Then, these patterns 10, 12, 14, 16 are converted into dot patterns to produce the print patterns of each color. In producing the dot patterns, as shown in Figure 3 the radius of each dot is set to 0.5 mm or less. Further, in order to express a gradation, as shown in Figure 3 the dot 20 is set to a smaller diameter than the dot 18. Further, in this embodiment, an opaque ink is used, and thus the positions of the dots are set in such a manner that the dot patterns of each color do not overlap.

[0023] Figure 4 is a view showing a pad printing process according to one embodiment of the present application. As shown in Figure 4 , pad printing is performed on a print target using the produced print patterns for each color. First, as shown in Figure 4 (A), the transfer plate 24 on which the patterns corresponding to the print patterns of each color are formed is supplied with an ink 26, and the pad 22 is pressed against the transfer plate 24 from above. As shown in Figure 4 (B), the pad 22 is deformed and tightly adheres to the transfer plate 24, and then when the pad 22 is moved upward, the ink 26 is transferred to the pad 22.

[0024] As shown in Figure 4 (C), the pad 22 is moved, or the print target 30 is placed instead of the transfer plate 24, whereby the print target 30 is positioned below the pad 22. Then, the pad 22 is moved downward to press the pad 22 against the print target 30, whereby as shown in Figure 4 (D), the ink 28 of the prescribed pattern adhered to the pad 22 is transferred to the print target 30. The above-described transfer step is repeated. That is, a first transfer step of transferring the print pattern of the color C to the print target 30, a second transfer step of transferring the print pattern of the color M to the print target 30, a third transfer step of transferring the print pattern of the color Y to the print target 30, and a fourth transfer step of transferring the print pattern of the color K to the print target 30 are performed.

[0025] Through the printing process described above, a dot pattern of four colors is printed on the printing object 30. In this embodiment, since the ink is opaque and the dots do not overlap, the ink colors do not mix. However, by adjusting the position and size of the dots, a full-color final printed pattern can be presented through the complementary color effect.

[0026] According to this embodiment, the following effects can be obtained. Since the colors of the final printed pattern are divided into at least CMY to create individual color printed patterns, it is not necessary to create patterns for each color as in the past, thus simplifying the printing process. In addition, since the printed pattern is created as a dot pattern in the pattern creation step, gradient effects can also be achieved, enabling high-quality printing.

[0027] Because a K-color printing pattern is created in addition to CMY and a fourth transfer step is performed, a wider variety of colors can be represented. In addition, because the diameter of the dots in the printing pattern is set to less than 0.05mm, high-quality printing can be performed smoothly without any dot effect during printing.

[0028] By varying the diameter of the dots in the printed pattern according to the pattern, specifically the intensity of the colors in the pattern, gradations can be created. This allows for a wider variety of printing effects.

[0029] In the pattern making process, the dot pattern is made by giving each color of the printed pattern an angle to each other, more specifically, by offsetting each other by 15°. This prevents the formation of moiré stripes when the dots of the printed patterns of each color overlap, thus enabling high-quality printing.

[0030] In the pattern making process, opaque ink is used to create the printed pattern in a way that prevents the dots of various inks from overlapping. This simplifies the printing process and allows for the simple and quick production of printed patterns.

[0031] This invention is not limited to the embodiments described above; for example, it can also be implemented in the following ways. In the embodiments described above, opaque ink was used for printing in the pattern-making step, but it is not limited to this. For example, semi-transparent ink can be used, and color mixing can be considered to create the printed pattern. In this case, for each color of the printed pattern, color mixing is considered, and the printed pattern is set in a way that allows them to overlap. According to such a pattern-setting step, colors are represented by the mixing of semi-transparent ink, thus enabling a wider variety of color printing representations.

[0032] In the above-described embodiment, in the pattern making step, a printed pattern of K color is made in addition to CMY, but the present application is not limited thereto, and for example, a printed pattern of CMY alone can be made and transferred. In any case, in the pattern making step, at least color separation of CMY is performed to make printed patterns of respective colors.

[0033] In the pattern making step, the size of the dots of the dot pattern is set to 0.5 mm or less, but the size of the dots is not limited thereto and can be freely set according to the final printed pattern. In the above-described embodiment, the size of the dots of the printed pattern is changed according to the density of the color of the final printed pattern, but the present application is not limited thereto and a single size can be used, and the size can be changed according to other parameters.

[0034] In the pattern making step, the dot pattern is made in a state in which the printed patterns of respective colors are given angles with respect to each other, but the present application is not limited thereto and for example, the dot pattern can be made in a state in which the printed pattern of a part of the colors is given an angle with respect to the printed pattern of the other colors, or the dot pattern can be made in a state in which the printed patterns of all the colors are given the same angle.

[0035] In the pattern making step, the printed patterns of respective colors are not necessarily dot patterns and any pattern can be made.

[0036] In the above-described embodiment, one printed pattern is made for each of CMYK colors, but the present application is not limited thereto and a plurality of printed patterns can be set for one color. In the above-described embodiment, an opaque ink is used, but the kind of ink can be appropriately selected according to the use and the final printed pattern, and for example, a special ink in which the color changes by changing the angle, a light-storing ink, or the like can be used. In addition, if silver is applied as a base on the surface of the print object by spraying or the like and then transfer printing of respective colors is performed, a hologram effect can be simulated and reproduced.

[0037] Explanation of Reference Numerals

[0038] 1 final printed pattern

[0039] 22 transfer rubber head

[0040] 30 print object

Claims

1. A pad printing method, wherein a printed pattern is transferred onto a printing object by contacting a pad printing head coated with ink with a printing object, the pad printing method being characterized by comprising the following steps: The pattern making process involves decomposing the colors of the final printed pattern into at least C (cyan), M (magenta), and Y (yellow), and then creating dot patterns for each color. The first transfer step involves transferring the printed pattern of color C onto the printing object using a pad printing head. The second transfer step involves transferring the printed pattern of color M onto the printing object using a pad printing head. as well as The third transfer step involves transferring the printed pattern of color Y onto the printing object using a pad printing head.

2. The pad printing method according to claim 1, wherein, The pattern creation steps include: converting the K-color (black) printed pattern into a dot pattern. The pad printing method further includes a fourth transfer step, in which the K-color printing pattern is transferred onto the printing object through a pad printing head.

3. The pad printing method according to claim 1 or 2, wherein, The pattern making steps include: setting the diameter of the dots in the printed pattern to less than 0.05 mm.

4. The pad printing method according to claim 1 or 2, wherein, The pattern making steps include: changing the diameter of the dots in the printed pattern according to the intensity of the color.

5. The pad printing method according to claim 1 or 2, wherein, In the pattern making step, the dot pattern is made after the printed patterns of each color are angled relative to each other.

6. The pad printing method according to claim 1 or 2, wherein, In the pattern making step, semi-transparent ink is used and color mixing is taken into account to create the printed pattern.

7. The pad printing method according to claim 1 or 2, wherein, In the pattern making step, opaque ink is used and the printed pattern is made in a way that prevents the dots of various inks from overlapping.

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