KR20070087906A - A method for manufacturing transfer paper by offset printing - Google Patents

Abstract

A transfer paper manufacturing method using offset printing is provided to reproduce the original color directly without a correction printing process and to transfer clear patterns and pictures on the surface of tiles or porcelain. A transfer paper manufacturing method using offset printing comprises the steps of: atomizing a printing pigment in the size of 1~5 micrometers(S1); producing the liquid pigment ink by mixing particle of the printing pigment with an adhesive binder and dispersing the mixture in a dispersing machine(S2); coating the surface of a transfer paper with an offset printing medium, the white ink, or transparent ink(S3); separating the color of a pattern or picture to be printed, into RGB(Red, Green, Blue) colors and then separating the RGB colors into 7~8 colors again(S4); selecting the size of a halftone dot to be printed, at high resolution(S5); adding up the number of selected halftone dots and outputting the halftone dots on each division plate divided in 7~8 colors by a printing plate(S6); installing each printing plate on an offset printer(S7); offset-printing the surface of the transfer paper(S8); and coating the surface of the offset-printed transfer paper with acryl resin or paraffin solution(S9).

Description

A method for manufacturing transfer paper by offset printing

1 is a manufacturing process diagram of the transfer paper according to the present invention,

2 is a paint plate transferred to a conventional water transfer paper,

3 is a paint plate transferred by the present invention.

The present invention relates to a transfer paper used for printing a pattern or picture for decoration on a surface of ceramics, tiles or glass containers or metal plastic products. Particularly, the present invention relates to a fine particle of 1 to 5 micrometers using a pulverizer for a pigment that is powdered powder. After pulverization, the granulated pigment was uniformly mixed with a pressure-sensitive adhesive binder containing 40 ± 20% rosin-modified phenolic resin and mixed at room temperature or 50 ± 20 ℃ for 1 to 30 hours. After dispersing with a dispersing machine to make liquid pigmented ink like ink used in offset printing, color or separation of the pattern or picture to be printed in RGB and 7 ~ 8 colors are separated into media using an offset printing machine. Continuous printing on the surface of coated transfer paper at a time to reproduce the original color as it is. Because of the increased addition of the transfer paper and it must implement the vivid colors without the need to have so that you can focus matches the print transfer the patterns and vivid picture.

In general, products made in large quantities such as porcelain products such as ceramics or tiles, or various glass containers such as glass bottles or glassware, and various products such as metal, plastic, wood or leather, have patterns of various colors to give a decorative appearance to the surface thereof. The picture is printed by water transfer paper, which is printed by offset printing or screen printing. Among them, the offset printing method is preferred because the pigment layer printed on the water transfer paper is thin, and the screen printing is preferred because the pigment layer printed on the transfer paper is thicker than the former. The screen printing method is to print a water-transfer paper coated with a water-soluble binder (chemical adhesive) repeatedly on a paper several times, one color at a time, and then print the pattern or drawing on the water-transfer paper with paraffin solution or acrylic resin. Covered or coated with a solution, it is immersed in water, water penetrates from the paper side, and the water-soluble binder is separated from the paper.

In the conventional offset printing method or the screen printing method as described above, the pigment which is powder powder is mixed in a fast drying oil at a ratio of about 100: 70 to 80 parts by weight, and the pigment is entangled in the fast drying oil so that no lump is formed. Mix well and use it as a printing pigment. The reason why the fast drying oil is used is that one color must be printed and sufficiently dried after the other colors are printed one by one in order to reproduce the color of the pattern or picture to be printed.

On the other hand, conventionally, the patterns or pictures to be printed on the surface of ceramics or tiles are separated into CMYK (Cyan, Magenta, Yellow, blacK), and these are printed in four colors and printed with CMYK four-color printing pigments prepared above. When printing in four colors of CMYK, if there is not enough color reproduction, a correction plate is added for correction printing of insufficient colors, and the color is corrected and printed on the printed pattern or picture. In addition, in the conventional offset printing method or screen printing method, since the water transfer paper is paper, the paper is finely increased by the printing pressure of the offset printing machine every time the printing is performed, and thus, the conventional offset printing colors one by one. In the printing method or the screen printing method, one color is printed and dried, and then the next color is printed on it again. The more colors to be printed, the more the printing becomes out of focus, and the vivid printing of patterns or pictures is impossible and the quality deteriorates. As a result, there were technical limitations to the realistic printing of patterns or pictures made of various colors.

In the conventional offset printing method or screen printing method, when a pattern or a picture printed on a water transfer paper is looked through with a magnifying glass (lupe), a round dot is visible, and empty spaces are visible between the dots, which is a low resolution dot (about 80). ~ 150 lines), but the practical reason is that the pigment used as a printing pigment is large, and the size of the dots is inevitably increased because the next color is printed after drying by printing one color. This caused the color resolution to fall.

In addition, when the pattern or picture printed on the conventional water transfer paper is floated and attached, the baked porcelain or tile product is examined in detail with the naked eye, and the resolution is not clear, no matter how many colors are used to form the pattern or picture. It can be seen that the patterns or paintings on the surface of porcelain or tile are as if they are attached with a label (sticker). The reason is that in the conventional offset printing method or screen printing method, the particles of powder powder, which are printing pigments, are large, The halftones, which are directly related to the reproducibility, are also large, so no matter how many colors they can float inside the surface of ceramics or tiles.

The present invention is a conventional water transfer paper, that is, the water transfer paper printed by mixing the printing pigment consisting of powder powder by color separation of the original film of the pattern or picture to be printed with CYMK and separating them into four colors. In order to solve the problems of the present invention, an object of the present invention is to produce a new offset printing through a conventional manufacturing method of printing water transfer paper used to print a pattern or a picture of various colors on articles produced in large quantities, including ceramics or tiles. The new technology that prints by means of printing enables clear colors without the need for correction printing, and ensures that prints are in focus so that clear patterns and pictures can be transferred to improve the quality of the printed object. It is.

In order to achieve the above object, the present invention uses the powdered printing pigment to make fine particles of 1 to 5 micrometers in size using a pulverizer, and the fast drying property used in the printing of water-transfer paper is used for printing the particulated pigment in pigment. Instead of oil, it is mixed with the binder used in offset printing where drying is common and 35 ± 10% by weight of binder with respect to 65 ± 10% by weight of printing pigment, and then dispersed again to liquidize like ink used in offset printing. The process of producing a pigment ink which is transformed into a pigment ink, coating the entire surface of the transfer paper coated with an oil component with medium, white ink or transparent ink used for offset printing, and printing a pattern or a picture to be printed. Separation step to separate into 7 ~ 8 colors by color separation with RGB, and 220 ~ 900 lines of halftone size to be printed according to the purpose of printed matter. Selecting appropriately within the range, adding the number of lines (dotted dots) selected above to each separation plate separated into seven to eight colors from the above, and outputting the printed plate to the offset printing machine And offset printing on the surface of the transfer paper coated with media, white ink or transparent ink using the ink pigment prepared above, and coating the surface of the offset printed transfer paper with an acrylic resin solution or a paraffin solution. It provides a method of producing water or thermal transfer paper by offset printing comprising a.

The present invention also uses water or heat transfer paper printed by the above-described offset printing manufacturing method, and various kinds of glass products such as ceramic tile enamel glass bottles and glass bowls, various plastic products, wooden furniture leather products baths, wash basins or toilets, such as water. Provide high quality printed matter printed by transfer paper.

Hereinafter, preferred embodiments which do not limit the present invention will be described in detail.

The manufacturing process of the transfer paper by the offset printing according to the present invention is shown in Figure 1, which is a step of making a powder of the printing powder having a respective color into fine particles of 1 to 5 micrometers using a grinder (S1). ,

In the above step (S1), the printing pigment made of fine particles is uniformly mixed with a binder (Dissolver, High speed mixer) together with a binder of a pressure-sensitive adhesive containing 40 ± 20% rosin modified phenolic resin at room temperature or 50 ± 20 ° C. After aging for 1 to 30 hours at the heat storage warehouse of the pigment ink (S2), which is made into a pigment ink liquefied like ink used in offset printing by dispersing again with a dispersion machine (3-Roll, Mill, Knider),

Coating the entire surface of the transfer paper coated with an oil component with medium, white ink or transparent ink used in an offset printing machine (S3),

Separation step (S4) that separates the pattern or picture to be printed into RGB and separates it into 7 to 8 colors.

According to the purpose of the printed matter, the size of the halftone to be output is appropriately selected within the range of 220 to 900 (S5),

Outputting to the printing plate in the halftone size selected in the step (S5) to each separation plate separated into seven to eight colors in the separation step (S4),

Mounting each output plate to the offset press (S7),

Offset printing on the surface of the transfer paper coated in the step (S3) using the ink pigments prepared in the above (S1, S2) (S8),

It comprises a step (S9) of coating with an acrylic resin solution or a paraffin solution on the surface of the offset printing transfer paper.

(Production of Pigment Inks; S1-S2)

Referring to S1 and S2, which are steps for preparing the pigment ink in the present invention in detail, first, the printing pigment, which is powdered powder, is made into fine particles of 1 to 5 micrometers using a grinder (S1), and the conventional dryness is fast. Instead of oil (medium), uniform mixing with a binder (Dissolver, High speed mixer) with an adhesive binder containing 40 ± 20% rosin modified phenolic resin, which is common to dry, at room temperature or 50 ± 20 ℃ After aging for 1 to 30 hours in an insulated warehouse, it is dispersed by dispersing machine (3-Roll, Mill, Knider) (S2), and then liquefied like an ink used in offset printing and transformed into pigment ink.

In the present invention, the reason why the binder of the pressure-sensitive adhesive component is relatively low in the manufacture of the pigment ink is to use the 8-color offset printing machine so that 7 to 8 colors must be overlapped at one time and continuously printed. If it dries quickly, the pigment ink hardens in the rubber roller of the offset press and continuous printing cannot be performed.

On the other hand, the conventional pigment mixing method is a mixture of pigments having a particle size of 12 ± 3 micrometers in the adhesive oil with a very fast drying rate in an appropriate ratio, when one color is printed and dried, another color is repeated one by one Screen printing or offset printing.

(Preparation of Transfer Paper; S3)

In preparing the transfer paper (S3), since the paper used as a general transfer paper is coated with a water-soluble binder (chemical adhesive), the surface is shaped like an oil so that the pigment ink prepared above is directly printed on the surface of the transfer paper. Since the entire surface of the transfer paper cannot be coated, a medium (white ink) or a transparent ink (coating) is used for offset printing.

(Color Separation and Printing Process; S4 ~ S8)

In the color separation and separation step (S4), the pattern or picture to be printed is separated into RGB and separated into 7 to 8 colors, which is disclosed in the color offset printing method as disclosed in the applicant's registered patent No. 494352. By using color separation and separation technology, the original color film on which the pattern or picture to be printed by the scanner is printed is decomposed into RGB, and the image which is decomposed into RGB is transmitted to the computer as the same RGB data, so that the image processing program (e.g., For example, Adobe's photoshop is processed, but image processing on a computer is not divided into three primary colors of light using RGB, but purple, orange, yellow, black, and pink. The image is decomposed into 7 to 8 colors of Pink, Blue, Green, or Red, and the previous 4 colors are used based on the 7-8 colors. (CMYK) to at least a 7-color separations, not.

In the step S5 after the separation step, the size of the halftone to be output is appropriately selected within the range of 220 to 900 lines to describe in high resolution according to the use of the printed matter. In the step S5, the step S4. The color tone of the color printing is reproduced by retouching each color tone processed in (), and the primary color in printing (gradation reproduction) is achieved through dots of the film. Athletes are the number of series of halftone rows that exist per unit inch, which is a fundamental factor in determining the resolution of the image being worked on.

When the amplitude modulation (AM) is performed in the above separation process, the spot phenomenon (moire phenomenon) occurs on the printed matter, and the turbidity of the printed matter occurs. Therefore, the frequency modulation (FM) or the amplitude modulation (AM) and the frequency modulation (FM) are performed. Use together. When the printed output plate is printed with seven colors as the basic colors, the quality is almost the same as the actual color tone. Therefore, the difference in quality can be easily compared with the printed materials separated by four colors by the CMYK. You can check it.

Further, after that, the step of outputting to the printing plate by adding the half-point number selected in the halftone selection step (S5) to each separation plate separated in the seven to eight colors in the separation step (S4) and outputs, and Mounting each printed plate to an eight-color offset printing machine (S7) and offset printing the surface of the transfer paper coated in the step S3 using the ink pigments of the respective colors prepared in the steps S1 and S2. Complete the transfer paper via (S8). In this step, since 7 to 8 colors are continuously printed at one time by the offset printing machine, the printing paper (transfer paper) does not increase, and the focus of the printing is accurate, so that the vivid colors can be described.

In addition, in the present invention, since the printing plate divided into at least seven colors is continuously reproduced at one time using an eight-color offset printing machine, there is no need for correction printing as in conventional offset printing or screen printing.

(Coating paper; S9)

In this step (S9) is coated with an acrylic resin solution or a paraffin solution in order to protect the transfer paper printing surface passed through the printing step (S4 ~ S8) is completed the offset printing manufacturing process of the transfer paper.

Transfer paper produced through the above process is the same method as the conventional method, that is, immersing the transfer paper in water and water penetrates to the transfer paper side to separate the water-soluble binder from the paper, it is floated and attached to the appropriate position of the ceramic or tile, and then fired When you finish the product.

The transfer paper of the present invention manufactured by such a manufacturing method, first, color separation of the original film to RGB and separated by 7 to 8 colors again in a computer to separate the separation process, not only the need for correction printing, Almost the same picture or pattern as the original color can be printed on the surface of ceramics or tiles, so that high quality and expensive materials can be produced. Second, liquid specially mixed uniformly with medium with relatively low granulation and dryness. Transferring paper is printed by printing different colors one by one after printing and drying each color in the process of printing conventional transfer paper because 7 ~ 8 colors are continuously printed on transfer paper continuously using pigment pigment produced. It eliminates the problem of misalignment of print focus caused by the increase and reproduces clear patterns and pictures. And, third, the number of dots also because many compared to conventional water transfer paper may be reproduced with precision close to the high-resolution picture of the patterns and real.

When the transfer paper of the present invention is attached to pottery or tiles and fired, the circumference of the pattern or the figure is the same as the engraved technique carved into the engraving tool, and the shape of the pattern or the figure is embossed to enhance the visible three-dimensional appearance of the sharp and clear high saturation. It looks like a technique, but in reality it is a printing technique that is tightly imbedded on the surface of ceramics or tiles, and the reason for this visual effect is that the number of dots (line counts) engraved on the printing plate at 1 inch intervals is such that there is no empty space. It is a fine high resolution halftone, and if you look into it with a 10x magnifier (lupe), you do not see the halftone and there is no space between the halftones. In addition, the present invention reproduced the color of the ink pigment liquefied with fine particles on the halftone dot without any empty space when printing, and reproduced the color of the printing plate separated by 7-8 colors Ink pigment is transformed into a solid material called printing, and the colors are intermingled with each other, and the weight of the aggregated force is heavy and liquefied while maintaining the powder particles of the ink pigment as it is fired. This is because it is permeated into the back.

As described above, the present invention is designed to continuously print at a time by a printing plate which is decomposed into RGB and separated into 7 to 8 colors by using a particulate liquid ink pigment on the surface of the transfer paper. The original colors can be almost reproduced without the process of correction printing, and the printing focus is also matched, so that the vivid patterns and pictures can be transferred onto the surface of ceramics or tiles, which has a useful effect of producing high quality objects.

Claims (4)

Granulating the printed pigment having a powder color with each color into a particle size of 1 to 5 micrometers using a grinder (S1); 1 ~ 30 hours at room temperature or 50 ± 20 ℃ by mixing the granulated printing pigment uniformly with a mixing machine together with a binder of adhesive component containing 40 ± 20% rosin modified phenolic resin which is dry. After aging to disperse again in a dispersing machine to prepare a liquid pigment ink, such as ink used in offset printing (S2); Coating the entire surface of the transfer paper coated with an oil component with medium, white ink, or transparent ink used in offset printing (S3); A separation step of separating the pattern or picture to be printed into RGB and separating it into 7 to 8 colors (S4); Selecting the size of the halftone to be output within the range of 220 to 900 lines according to the use of the printed matter (S5); Outputting to the printing plate in the halftone size selected in the step S5 on each separation plate separated into seven to eight colors in the separation step S4; Mounting each printed plate to an offset printing machine (S7); Offset printing (S8) the surface of the transfer paper coated in the step S3 using the ink pigments prepared in the steps S1 and S2; And, A method of manufacturing a transfer paper by offset printing, comprising the step (S9) of coating an acrylic resin solution or a paraffin solution on the surface of the offset printing transfer paper. The method of claim 1, Method of manufacturing a transfer paper by offset printing, characterized in that the mixing ratio of the printing pigment and the dryness of the binder generalized in the step (S2) is 35 ± 10% by weight of the binder relative to 65 ± 10% by weight of the printing pigment. . The method of claim 1, The color separated in the separation step (S4) is purple, orange, yellow, black, blacK, pink, blue, green, red. Method of manufacturing a transfer paper by offset printing, characterized in that at least 7 to 8 colors including. Transfer paper produced by the method of any one of claims 1 to 3.

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