JPH08253358A - Painting of ceramics, etc. - Google Patents

Abstract

PURPOSE: To improve adherability of a low viscosity ink by forming a thin fixed layer on a surface to be painted with an adhesive and powder capable of being burnt out at a lower temperature than the fixing temperature of an ink for ink-jet printing and baking after the ink is injected and absorbed on the fixed layer. CONSTITUTION: This method for painting ceramics is, as a pretreating process, to apply a mixture prepared by mixing and agitating powder capable of being burnt out at a lower temperature than the fixing temperature of an ink for ink-jet printing, adhesives having similar properties and, if needed, an antiseptic agent to a glaze of a body to be muffle painted 2 to coat it, dry the coated body and form a thin fixed layer 3 on a surface to be painted, then spray ink 6 for ink-jet printing containing a dispersing agent in water or in an oil and about 10-20wt.% metal pigment onto the above mentioned treated body, bring the ink to be absorbed on the fixed layer 3, print a pattern on the surface to be painted, then bake at about 55-1350 deg.C predetermined fixing temperature of the ink 6 for ink-jet printing, burn out the fixed layer 3 and fix the ink 6 for ink-jet printing to the glaze 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a painting method for painting and fixing ceramics including ceramics, tiles, ceramic plates, glass, enamel, heat-resistant boards for construction, concrete plates and the like with ink.

[0002]

2. Description of the Related Art Conventionally, when painting on ceramics,
You can either paint by hand the ink for painting on the painting surface,
Alternatively, a method in which a transfer paper is attached and baked is common.

[0003]

In the former handwriting method, there is a problem that the quality is varied depending on the skill of the operator, as well as being time-consuming and costly. In addition, the latter method of attaching the transfer paper has a problem that it is effective only for mass-produced products and is not suitable for individual products or small-volume products.

By the way, in recent years, the performance of a so-called ink jet printer which ejects ink from a nozzle to draw on the surface of an object to be drawn has been rapidly improving. The present applicant has developed an ink for an ink jet printer which can be used in this ink jet printer and has a property of being fixed on the surface of a ceramic or the like by firing, and has filed a patent application as Japanese Patent Application No. 6-288743.

However, ink for ink jet printers, which has a low viscosity, is hard to adhere when it is glazed on a painting surface of ceramics or the like, or when it is made of glass.
Sometimes the ejected ink drips and you cannot print properly.

[0006]

The present invention has been made in view of the above, and uses an ink for an ink jet printer which has a property of being fixed on the surface of a ceramics or the like by firing, and Provide a painting method. A pretreatment step of forming a thin fixing layer on the painting surface by adhering powder having a property of being burned off at a temperature lower than that of fixing the ink for an inkjet printer with an adhesive having the same property. A printing process in which an ink jet printer ink is jetted onto a painting surface by an ink jet printer and the ink jet printer ink is adsorbed to a fixing layer to print arbitrary characters or figures. A finishing process in which ink for inkjet printers is fixed on the painted surface by burning away the fixing layer by baking ceramics.

Further, it is desirable that a glaze such as flax is uniformly applied to the painting surface after the printing step and the glaze is baked and fixed in the finishing step.

The ink for ink jet printer comprises at least three components of water or oil, a metal pigment having a property of coloring and fixing when fired, and a dispersant for preventing precipitation of the metal pigment. It is preferable that the maximum particle diameter of the metal pigment is smaller than the nozzle diameter of the ink jet printer, and the mixing ratio of the metal pigment is about 10 to 20% by weight.

[0009]

Since the fixing layer adsorbs and holds the ink for ink jet printer sprayed from the ink jet printer, characters and figures can be surely printed even on a painting surface such as a glazed ceramic which is hard to be attached with low viscosity ink.
Therefore, it becomes possible to paint on a ceramic or the like using an inkjet printer. Further, if a glaze such as flax is applied and baked on the painting surface after the printing process is finished, the glaze is fixed to protect the painting surface and to give gloss.

[0010]

First Embodiment A first embodiment of the present invention will be described below with reference to the drawings. 1 (a) to 1 (d) illustrate a tile painting method, in which (a) is before painting.
(B) is a partially enlarged sectional view showing after pretreatment, (c) after printing, and (d) after firing, FIG. 2 is a schematic side view showing a state of a printing step, and FIG. 3 shows a completed tile. It is a perspective view shown.

The painting method of the present invention comprises a pretreatment step of forming a fixing layer on the painting surface, a printing step of printing characters and figures on the painting surface, and a finishing step of fixing ink on the painting surface. And consists of. Further, the object to be painted may be any ceramic that includes a ceramic plate, a tile, a ceramic plate, glass, enamel, a heat-resistant board for construction, a concrete plate, etc., as long as it can be baked at the fixing temperature of the ink for an inkjet printer described later. , Here glaze 1 on the painting surface
The tile 2 fired and fired is used.

First, in the pretreatment step, 800 g of water, 100 g of flour as powder, and 20 g of dextrin as an adhesive agent.
Are mixed and stirred, and the mixture is applied onto the glaze 1 of the tile 2 by an appropriate method such as brush coating or spraying, and this is dried to form the thin fixing layer 3 on the painting surface. . The powder may be any as long as it has a property of adsorbing an ink for an inkjet printer described below and a property of being burned at a lower temperature than the ink for an inkjet printer is fixed, for example, a baking powder instead of the flour. Good. The same applies to the adhesive. In addition, when food such as wheat flour is selected as the powder, a preservative such as formalin is used in the above case in an amount of about 5%.
If you add about ml, it will not rot easily. Furthermore, if about 10 ml of the water-soluble coloring agent is added to the above-mentioned mixture of wheat flour and dextrin or the mixture containing a preservative, the fixing layer 3 is colored in any color different from the color of the painting surface. Good. For example, the painting surface is usually white in many cases, while the fixing layer 3 is also white as a main component of wheat flour, so that the fixing layer 3 is colored yellow or light blue.
By doing so, the presence or absence of the fixing layer 3 can be discriminated at a glance, and the fixing layer 3 may be erroneously touched or the fixing layer 3 may be mistakenly touched.
It is possible to prevent the mistake of re-applying the fixing layer 3 on the above.

Next, in the printing process, as shown in FIG. 2, a known ink jet printer 5 for ejecting ink from the nozzles 4 is used.
Has a structure in which ink is horizontally ejected on a vertical surface to print. Therefore, the tile 2 is set up so that the painting surface is vertical and set at a predetermined position.

The ink jet printer ink 6 used in the ink jet printer 5 is a mixture of water, a metallic pigment, and a dispersant. The metallic pigment is a known pigment used in the field of ceramics, and is, for example, a powder containing cobalt or chromium as a main component. This metal pigment is generally provided for ceramics with an average particle size of about 8μ, but it is processed to a finer average particle size of about 1-6μ. The maximum diameter of the metallic pigment is smaller than that of the metallic pigment because the nozzle diameter of the inkjet printer 5 is about 60 μm. On the other hand, as the dispersant, for example, carboxymethyl cellulose or gum arabic is used, but a commercially available dispersant can be used as it is. Then, when the metal pigment and the dispersant are mixed in water at a ratio of about 11.9% by weight and about 11.9% by weight and stirred, an ink 6 suitable for the inkjet printer 5 is formed. The ink jet printer ink 6 made as described above is the ink jet printer 5
Although it is a liquid that can be used in, the metal pigment hardly precipitates. Then, as a result of filling this in the inkjet printer 5 and performing a test operation, it was not clogged at all.

As a result of extensively testing the proportion of the metallic pigment in the above manner, good results were obtained in the range of about 10% by weight to 20% by weight. At this time, the proportion of the dispersant mixed at the same time may be almost the same as the proportion of the metal pigment, but some adjustment may be required depending on the kind of the dispersant. Further, although the metal pigment and the dispersant are mixed with water in the examples, oil may be used instead of the water. Of course, in that case, it is necessary to change the dispersant to an oil-based one.

Thus, the ink for ink jet printer 6 ejected from the nozzle 4 of the ink jet printer 5 in the printing step is adsorbed by the fixing layer 3 formed on the painting surface and held without dropping. As is well known, the inkjet printer 5 is controlled by a computer (not shown), and can output characters or figures, or a photo or picture read by a scanner, so that a free pattern can be printed on the painting surface. Can be printed.

Next, in the finishing step, the tile 2 is baked at a designated fixing temperature (about 550 ° C. to 1350 ° C.) of the ink 6 for the ink jet printer. Then, in the process, the fixing layer 3 is completely burned off, the ink 6 for inkjet printer is fixed on the surface of the glaze 1, and only the pattern printed in the printing step remains.

[0018]

Example 2 In Example 2, a glaze 7 such as flax is uniformly applied to the painting surface after the printing step of Example 1 as shown in FIG. 4, and the glaze 7 is baked in the finishing step. It is designed to be fixed on the painting surface. Established glaze 7
Completely covers the painting surface as shown in FIG. 5, and exerts a glossing and protecting effect.

[0019]

As described above, in the painting method of the present invention, since the fixing layer adsorbs and holds the ink for an ink jet printer sprayed from the ink jet printer, it is possible to apply the ink to a low-viscosity ink such as glazed porcelain. Characters and figures can be printed neatly on the painting surface. Therefore, it is possible to paint on ceramics using an inkjet printer, and it is a single item or a small quantity product, such as a porcelain plate with a private commemorative photo burned on it, or a tile mural tailored to a specific facility There is an effect that can be provided at low cost. Further, when the glaze is applied to the painting surface after the printing step and is fixed in the finishing step as in claim 2, the painting surface is covered with the glaze, so that the surface is firmly protected. It also has a beautiful gloss effect.

[Brief description of drawings]

1A to 1D are diagrams for explaining a tile painting method, in which FIG. 1A is before painting, FIG. 1B is after pretreatment, and FIG. (D) is a partially enlarged cross-sectional view showing after firing.

FIG. 2 is a schematic side view showing a state of a printing process.

FIG. 3 is a perspective view showing a completed tile.

FIG. 4 shows Example 2 and is a partially enlarged sectional view of a tile showing a state in which a glaze is applied.

FIG. 5 shows Example 2 and is a partially enlarged sectional view of a tile showing a state after firing.

[Explanation of symbols]

 2 ... tiles (ceramics, etc.) 3 ... fixing layer 5 ... inkjet printer 6 ... ink for inkjet printer 7 ... glaze

Claims (3)

[Claims] 1. A method of painting a ceramics or the like, which comprises the steps of using the ink for an ink jet printer having the property of fixing to the surface of the ceramics or the like by firing. A pretreatment step of forming a thin fixing layer on the painting surface by adhering powder having a property of being burned off at a temperature lower than that of fixing the ink for an inkjet printer with an adhesive having the same property. A printing process in which an ink jet printer ink is jetted onto a painting surface by an ink jet printer and the ink jet printer ink is adsorbed to a fixing layer to print arbitrary characters or figures. A finishing process in which ink for inkjet printers is fixed on the painted surface by burning away the fixing layer by baking ceramics. 2. A porcelain or the like according to claim 1, wherein a glaze such as flax is applied to the painted surface after the printing step and the glaze is baked and fixed in the finishing step. Painting method. 3. The ink for ink jet printer is mixed with at least three elements of water or oil, a metal pigment having a property of coloring and fixing when baked, and a dispersant for preventing precipitation of the metal pigment. The maximum particle size of the metal pigment is smaller than the nozzle diameter of an inkjet printer, and the metal pigment is set to a mixing ratio of about 10 to 20% by weight. How to paint the pottery etc. mentioned.