JP2018057683A - Manufacturing method for cloisonne ware - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a cloisonne product of high quality feeling through a simple process, facilitate color density adjustment and coloring adjustment, and to prevent loss of gloss of a surface even in a case where heating is repeated.SOLUTION: In a basis material processing step S1, a precious metal material such as a gold alloy is processed into a basis material of required shape. Subsequently, in a glazing step S2, a cloisonne glaze is applied to the surface (surface to be glazed) of the basis material and dried. In a precious metal colloid application step S3, precious metal colloid comprising a medium and precious metal nanoparticles dispersed in the medium is applied to the cloisonne glaze applied in the glazing step S2. Then, a semi-product dried to a certain degree in a drying step S4 is burned in an electric furnace in burning step S5, thereby forming a cloisonne layer exhibiting transparent gloss and stable coloring on the surface of the basis material glazed integrally with the glaze and the precious metal nanoparticles of the precious metal colloid. Subsequently, in a finish polishing step S6, the surface of the cloisonne layer is finish-polished to for completion of a beautiful cloisonne product.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for manufacturing cloisonne products such as accessories and daily commodities, in which a cloisonne layer is formed by cloisonne ware on a cloisonne or base (base material, metal, etc.).

Cloisonne products made from cloisonne are well known as traditional Japanese crafts. The cloisonne layer formed by cloisonne ware has a distinctive vitreous transparency and weight, has a delicate color and gloss that change intricately, and has a beautiful and elegant taste.
Conventional cloisonne products are generally polished with a copper plate, and then applied with various cloisonne glazes to draw various patterns on the surface. Is made to form.

On the other hand, various accessories such as brooches, pendants, and tie pins are generally made of precious metals such as gold, silver, and platinum, and jewels. For example, as shown in Patent Document 1, the cloisonne layer by cloisonne on the surface is used. The cloisonné accessories that form the are also manufactured.
In the example described in Patent Document 1, pure silver plating is applied to the surface of a jewelry or gold alloy accessory base material, and various cloisonne glazes are applied on the surface and dried to some extent, and then placed in a kettle or a furnace and fired. The cloisonne layer was formed. This prevents the cloisonne color and tone from changing over time and prevents the quality from changing over a long period of time.

JP 2008-161603 A

However, the colored cloisonne glaze used in the manufacture of cloisonne products such as the traditional cloisonné jewelry is made by melting and hardening colored glass, such as the material of stained glass, and then pulverizing it into a fine powder. Many of these were made into a paste with water and funnel or the like.
As a cloisonne glaze with colored glass powder, for example, selenium is used as a glaze pigment to obtain a reddish color, but selenium is difficult to obtain due to rare earths, and there is a problem that it can not make shades there were.

Gold is used for glaze pigments that produce pink coloration, but it is difficult to always give the desired finished color, and if the surface is baked again for repairs, the surface gloss is lost. There was also the problem of becoming cloudy.
If you are going to get pink color, if you apply a gold pigment cloisonne glaze directly to the base material, it will become vermilion, so silver plating is applied to the surface of the base material, and the base is covered with a transparent glaze called Shirosuke It is given a pink color by overlaying a gold pigment cloisonne glaze on it. Therefore, there are problems that the number of processes is increased and bubbles are easily mixed and cracked. Further, it was confirmed that discoloration easily occurred, for example, the peripheral portion was discolored brown.

  The present invention has been made to solve the above-described problems for producing cloisonne products. In other words, high-quality cloisonne products can be manufactured with a relatively simple process, color density adjustment and color development adjustment are easy, and there is no loss of surface gloss or discoloration even after repeated heating. An object is to stably obtain a desired finished color and to prevent bubbles or cracks.

  In order to achieve the above object, a method for producing a cloisonne product according to the present invention includes a glazing step of applying cloisonne glaze to a cloisonne or a base and drying, and a cloisonne glaze applied in the glazing step with noble metal nanoparticles on a solvent. A precious metal colloid application step of applying a precious metal colloid dispersed therein, and a baking step of forming a cloisonne layer by baking a cloisonne glaze on the cloisonne or base and baking a semi-finished product coated with the precious metal colloid thereon It is characterized by having.

By repeating the glazing process, the precious metal colloid coating process, and the firing process a plurality of times, the color density of the cloisonne layer can be controlled.
In the precious metal colloid coating step, the color density of the cloisonne layer can also be determined by applying the precious metal colloid on the cloisonne glaze and drying it, and then applying and drying the precious metal colloid again multiple times. Can be controlled.
The color of the cloisonne layer can be controlled by the kind of element, particle diameter or particle shape of the noble metal nanoparticles in the noble metal colloid.
When producing cloisonne jewelry or the like, the cloisonne or base is preferably a noble metal base such as a gold alloy, and a gold colloid in which gold nanoparticles are dispersed in a solvent may be used as the noble metal colloid.

  According to the present invention, a high-quality cloisonne product can be manufactured by a relatively simple process, color density adjustment and color development adjustment are easy, and even when repeatedly heated, the surface gloss is lost or discoloration occurs. In other words, the desired finished color can be obtained stably without any bubbles or cracks.

It is a front view of the broach which shows an example of the cloisonne product manufactured by the manufacturing method by this invention. It is a typical expanded sectional view equivalent to the cross section in alignment with the XX line of FIG. 1 for demonstrating each process of one Embodiment of this invention. It is process drawing of one Embodiment of the manufacturing method of the cloisonne product by this invention.

Hereinafter, embodiments for carrying out the present invention will be specifically described with reference to the drawings.
FIG. 1 is a front view of a broach manufactured by the manufacturing method according to the present invention and showing an example of a cloisonné product. This cloisonne clothing product 1 is a brooch of a jewelry having a petal motif, and becomes a forming surface of a support portion 2 having a trifurcated shape, and a contour edge 11 and a cloisonne layer 12 of a petal portion 3 provided at each tip thereof. The substrate (base material) is made of a noble metal such as a gold alloy.
And the cloisonne layer 12 is formed on the glazed surface 10a which is the area | region enclosed by the outline edge 11 of the base 10 shown in FIG. The base material forming this cloisonne layer is also called cloisonne.

2A to 2D are schematic enlarged cross-sectional views corresponding to a cross section taken along the line XX of FIG. 1 for explaining each step of the embodiment of the present invention.
First, (a) shows the processing process of the base material used as a cloisonne. In this step, in this example, the base 10 including the contour edge 11 of the petal portion 3 is created together with the support portion 2 shown in FIG. 1 by a noble metal such as a gold alloy. You may create the support part 2 and each petal part 3 separately. Here, only the production of the petal portion 3 will be described.

  The substrate 10 including the contour edge 11 of the petal portion 3 and the glazed surface 10a is made by processing a noble metal material such as a gold alloy by casting, pressing, or engraving. This is the substrate processing step. In that case, you may form the arbitrary patterns by an unevenness | corrugation in the glazed surface 10a. Then, when a cloisonne layer is formed using a transparent glaze and a noble metal colloid in a later step, the pattern due to the unevenness can be seen through.

The substrate 10 thus processed is heated (blank) and annealed, and then the oxide film is removed and polished until a metallic luster is obtained. Furthermore, it is desirable to perform a degreasing process using a multilayer or the like after performing a process suitable for the substrate 10. These are pretreatment steps to be performed as necessary.
The treatment suitable for the substrate 10 is, for example, when the substrate 10 is a golden product, a white glazing agent and a gold colloid are used to form a cloisonne layer, and when it is desired to show orange, only a polishing treatment is necessary, If you want to show it, it will look vivid by applying silver plating to the substrate 10. In the case where the substrate 10 is a silver product, the pink color can be vividly shown only by the polishing process.

In the next step, as shown in FIG. 2 (b), the cloisonne glaze 13 is applied to the glazed surface 10 a surrounded by the contour edge 11 of the substrate 10 using a brush or a Jose (bamboo spatula) (incorporation). ,dry. This is the glazing process. As the cloisonne glaze 13, for example, a white transparent glaze that is a white transparent (shirosuke) may be used.
However, the cloisonne glaze 13 can use various types similar to the conventional one. In other words, a translucent semi-transparent (Hansuke) glaze, a white white glaze, and in some cases a color glaze containing a pigment may be used.

Next, in the noble metal colloid application step shown in FIG. 2C, the noble metal colloid 15 in which the noble metal nanoparticles are dispersed in the solvent is applied onto the cloisonne glaze 13 applied in the glazing step in (b). The applied precious metal colloid 15 soaks into the cloisonne glaze 13.
In the noble metal colloid 15, fine particles in which the particle size of a noble metal such as platinum, gold, and silver is controlled to a nano size (1 to 100 nm) are uniformly dispersed in a liquid that is a solvent. This is also referred to as a noble metal colloid solution or a noble metal colloid solution.

Gold colloids in which the noble metal nanoparticles are gold nanoparticles are used, for example, as antibody labeling reagents used for influenza testing or the like, or for medical use. In this example, this gold colloid may be used.
The color of the cloisonne layer can be controlled by the kind of element, particle diameter or particle shape of the noble metal nanoparticles. Specific examples thereof will be described later.

  As the solvent for dispersing the noble metal nanoparticles, any solution such as distilled water, phosphate buffer solution, polyethylene glycol solution, organic solvent and the like in which the noble metal nanoparticles are not aggregated can be used. In addition, when the surface of the noble metal nanoparticles is modified with amino acids so that the particles do not aggregate with each other, the more stable dispersion state is maintained, so that the color development is stable.

  With respect to the concentration of the noble metal colloid, it is possible to obtain a light color by diluting with each solution and a dark color by volatilizing the solution based on a commercially available product. As a commercially available product, a noble metal colloid used in an immunochromatography method, which is basically an antigen / antibody test method, can be used stably. It is commercially available from, for example, Sigma Aldrich and Cosmo Bio.

  In this way, the semi-finished product (the semi-finished product of the petal portion 3 in this example) in which the cloisonne glaze 13 is applied to the surface (glazed surface 10a) of the substrate 10 and the precious metal colloid 15 is applied thereon is heated and fired. By doing so, the cloisonne layer 12 is formed on the noble metal substrate as shown in FIG. This is the firing step. Prior to this firing step, the noble metal colloid 15 applied on the cloisonne glaze 13 is dried to some extent, so that the mixing of bubbles can be prevented and a more transparent cloisonne layer can be obtained. Therefore, it is desirable to perform a drying process. In particular, when the precious metal colloid 15 is repeatedly applied, it is necessary to apply the precious metal colloid again after the precious metal colloid 15 previously applied has dried to some extent.

In the firing step, a half-finished product as shown in FIG. 2C, in which a cloisonne glaze 13 is applied to the surface of the substrate 10 and a precious metal colloid 15 is applied thereon, is placed in an electric furnace, and a normal cloisonne firing step. The same baking time (several tens of seconds to several minutes) is performed in the same temperature range (700 to 800 ° C.).
Accordingly, the cloisonne glaze 13 and the noble metal nanoparticles of the noble metal colloid 15 are integrally attached to form the cloisonne layer 12, and exhibit a transparent gloss and stable color development. For example, when a white translucent agent and gold colloid were used, the color developed into a slightly bluish pink with a higher transparency than before.

  After the cloisonne layer 12 is formed in this manner, finish polishing such as buffing or charcoal polishing is performed in the finish polishing step to complete the accessory. The surface of the cloisonne layer that has been crushed out of the substrate 10 in the glazing process may be trimmed with charcoal sharpening to make the surface clean. It is desirable to go and smooth the surface.

FIG. 3 is a process diagram of an embodiment of a method for producing a cloisonne product according to the present invention.
As shown in FIG. 3, the manufacturing method of the cloisonne product according to this embodiment includes the base processing step S1, the glazing step S2, the noble metal colloid coating step S3, the drying step S4, the firing step S5, and the finish polishing step S6 in order. carry out. The contents of each step are as described above with reference to FIG.

First, in the substrate processing step S1, it is desirable to process a precious metal material such as a gold alloy into a substrate having a desired shape, and then perform a pretreatment step such as empty baking, polishing, or degreasing as described above. This step may be a cloisonne formation step of forming cloisonne with various materials described later.
In the next glazing step S2, the cloisonne glaze is applied to the substrate or the surface of the cloisonne (glazed surface) as described above and dried.
In the precious metal colloid coating step S3, a precious metal colloid in which precious metal nanoparticles are dispersed in a solvent is applied onto the cloisonne glaze applied in the glazing step S2. And it is made to dry to some extent in drying process S4.

In this way, the semi-finished product in which the cloisonne glaze was applied to the surface (glazed surface) of the noble metal substrate and the noble metal colloid was applied thereon was heated in an electric furnace in the firing step S5 and heated at 700 to 800 ° C. Firing for several tens of seconds to several minutes.
As a result, the cloisonne glaze and the precious metal colloidal precious metal nanoparticles are adhered together to form a cloisonne layer on the surface of the substrate, exhibiting a transparent gloss and stable color development.
Thereafter, in the finish polishing step S6, the surface of the cloisonne layer is finish-polished to complete a beautiful cloisonne product (brooch that is an accessory in the above example).

  In the precious metal colloid coating step S3, the precious metal colloid is coated on the cloisonne glaze and dried in the drying step S4. Then, as shown by the one-dot chain line in FIG. 3, the gold colloid is again coated in the precious metal colloid coating step S3. Applying and drying in the drying step S4 may be repeated a plurality of times. Accordingly, it is possible to control the shade of the color due to the color development of the cloisonne layer formed by one firing. In this way, the color density becomes higher as the number of times of applying the noble metal colloid is increased.

Alternatively, as shown by the broken arrow line in FIG. 3, the surface of the substrate or cloisonne (glazing surface) is coated with cloisonne glaze in the glazing step S2 and dried. After applying, drying in the drying step S4, baking in the baking step S5, and again repeating the glazing step S2 to the baking step S5 a plurality of times, it is possible to control the color of the cloisonne layer and the density of color development. it can.
Also in this case, as the number of repetitions, that is, the number of times of applying the precious metal colloid increases, the density of the color to be developed increases.

Further, as will be described later, the color of the cloisonne layer can be controlled by the element type, particle diameter, or particle shape of the noble metal nanoparticles in the noble metal colloid applied in the noble metal colloid application step S3.
For example, when gold colloid is used and the gold nanoparticles are spherical, the particle diameter is orange at 20 nm, pink at 40 nm, and blue-violet at 80 nm. When the gold nanoparticles are flat, the color is blue, and when the gold nanoparticles are cylindrical, the color is purple. In the case where the gold nanoparticles are other than spherical, it is possible to control the coloring color depending on the thickness and size thereof. Then, even if a gold colloid in which these gold nanoparticles are dispersed is applied onto a cloisonne glaze and baked, a cloisonne layer that develops colors in the same manner as described above can be formed.

A noble metal other than gold, for example, a silver colloid in which the element of the noble metal nanoparticle is silver, or a platinum colloid in which platinum (platinum) is used can also be used. The color of the cloisonne layer can also be controlled by the type of element of the noble metal nanoparticles in the noble metal colloid.
The color development of silver colloid and platinum colloid basically changes depending on the particle size. Furthermore, silver colloid has special characteristics, and by adjusting the color based on the three principles of color, a desired color is exhibited even when silver colloids having different silver nanoparticle sizes are mixed. In the case of other precious metal colloids, mixing red and blue does not turn purple, but in the case of silver colloids, the color is purple as a rule, so color mixing like watercolor paints can be performed and gradation expression can be easily performed.

  According to such a method for producing cloisonne products, a high-quality cloisonne product can be produced in a relatively simple process, color density adjustment and color development adjustment are easy, and surface gloss is lost even after repeated heating. There is no occurrence of discoloration, and a desired finished color can be obtained stably and without bubbles or cracks.

For example, in the case of a cloisonne jewelry made of a metal base, a current product in which a cloisonne layer is formed using a glaze of New Pink, Silver Pink, or G100 (pink) is a slightly yellowish pink color. On the other hand, the product of the present invention in which a cloisonne layer was formed by applying gold colloid on a white translucent agent was evaluated as having a slightly bluish pink color with no yellowness and high transparency. I received it.
For example, the current silver pink color data is # e1c17c5 and is defined as light grayish red, and the color configuration is RGB (88, 78, 77) CMYK (0, 12, 12, 12). It is defined as Very pale red (Pink tone) by # ffe0e0 in the part with high brightness.

On the other hand, the color data of the product in which the present invention is implemented is # bb87a3 and is defined as Slightly desaturated pink, and the color configuration is RGB (73, 53, 64) CMYK (0, 28, 13, 27). And in bright parts, it is defined as Pale pink by # ffb8de.
Consumers tend to select the color of accessories according to their skin color, and it is also effective in that the choice of consumers increases due to such a difference in color.

When manufacturing high-quality items such as jewelry, precious metals are used as the base material that will be the cloisonne. For example, gold alloys such as K24, K22, and K18 (including different colors such as white gold), pure silver, silver alloys such as Sil925, platinum alloys such as Pt1000 and Pt950, and the like. In the case of daily necessities and ornaments, other metals such as copper, iron and brass can also be used.
Alternatively, it is also possible to use cloisonne with ceramics or ceramics, or cloisonne with a metal plating such as silver plating on the surface or coated with a metal foil.
That is, any material that can form the cloisonne layer by the steps S2 to S5 described above with reference to FIG.

The present invention is not limited to the wireless cloisonne as described above, but can be applied to all cloisonne technologies such as a wired cloisonne, a transparent cloisonne, and a cloisonné cloisonné.
In the case of wired cloisonne, create a contour line with a noble metal such as silver wire on the ground, and apply a different glaze to each area delimited by the contour line, or apply a noble metal colloid with a different color on the glaze. Or the number of times of application of the noble metal colloid can be changed, and a cloisonne layer having a complicated pattern composed of a plurality of colors can be formed by subsequent baking.

  The cloisonne cloisonne is a technique in which a part of the womb (base) is cut through and watermarked, and a transparent glaze is applied thereto, and the other cloisonne is formed in the other part. In that case, a thin transparent cloisonne layer is baked in the watermark portion using the surface tension of the water of the transparent glaze, and then the desired glaze can be placed to create a stable transfusion.

  The cloisonné cloisonne, for example, forms a cloisonne layer by patterning the copper womb (base) with silver wire, then corrodes the copper womb with acid and removes it, leaving only the silver wire and the cloisonne part surrounded by it. It is. The present invention can also be applied to the manufacture of such cloisonne products. The jewelry (jewelry) manufactured in this way has an image similar to that of a precious stone fastened with a bullion.

  Specific examples of the cloisonne products that can be manufactured by the present invention include accessories such as brooches, pendants, earrings, earrings, finger rings, necklaces, bracelets, tie pins, cuffs, clasps, hair ornaments, bandages, and jewelry. However, the present invention can be applied to a wide range of cloisonné products including daily necessities such as compacts, watches, glasses, hand mirrors, photo frames, writing tools (such as ballpoint pens and fountain pens).

1: Cloisonne product (brooch) 2: Support part 3: Petal part 10: Base 10a: Glazed surface 11: Contour edge 12: Cloisonne layer
13: Cloisonne glaze 15: Precious metal colloid

Claims (5)

A glazing process of applying cloisonne glaze to the cloisonne or the base material and drying,
A noble metal colloid coating step of applying a noble metal colloid in which noble metal nanoparticles are dispersed in a solvent on the cloisonne glaze applied in the glazing step;
A firing step in which the cloisonne glaze is applied to the cloisonne or base, and a semifinished product on which the noble metal colloid is applied is baked to form a cloisonne layer,
A method for producing a cloisonne product, comprising:   The method for producing a cloisonne product according to claim 1, wherein the color density of the cloisonne layer is controlled by repeatedly performing the glazing step, the precious metal colloid coating step, and the firing step a plurality of times.   In the noble metal colloid coating step, after the noble metal colloid is applied on the cloisonne glaze and dried, the noble metal colloid is applied again and dried a plurality of times, thereby changing the color density of the cloisonne layer. The method for producing a cloisonne product according to claim 1, wherein the method is controlled.   The production of the cloisonne product according to any one of claims 1 to 3, wherein the color development of the cloisonne layer is controlled according to the element type, particle size, or particle shape of the noble metal nanoparticles in the noble metal colloid. Method. The cloisonne or base is a precious metal base such as a gold alloy,
The cloisonne product according to any one of claims 1 to 4, wherein the noble metal nanoparticles are gold nanoparticles, and the noble metal colloid is a gold colloid in which the gold nanoparticles are dispersed in a solvent. Production method.

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