JPH04214881A - Method for multicoloring ornament - Google Patents

Abstract

PURPOSE:To simplify the process, to lower the defect rate and to provide a combination of various color tones to a high-grade ornament by masking the ornament in the stage after ion plating. CONSTITUTION:Titanium, a titanium alloy, stainless steel, nickel, a chromium alloy, a copper alloy, etc., are provided on a base material 1 as a coating film. The thin film 3 of gold, a gold alloy, palladium or a palladium alloy having <=0.5mu thickness is formed by ion plating in the same device, a wet plating 4 of the noble metal having a different color tone is formed in 0.5-3mu thickness on the colored coating film, and a mask 5 is provided in accordance with the specified pattern. The exposed plating layer 4 is then dissolved and removed, the mask is finally removed, and the multicolored pattern consisting of the colored coating film 2, noble metal ion-plating thin film 3 and wet noble metal plating layer 4 is formed on the base material 1.

Description

[Detailed Description of the Invention] The present invention relates to a method for diversifying watches, eyeglass frames, lighters, fountain pens, brooches, etc. Traditionally, colors such as gold, silver, and black have been emphasized for decorative items, but recently, colors such as gold, silver, and black have been emphasized. In addition, it has become increasingly popular to create multiple colors by combining these tones.

However, with the conventional wet-only method, it is impossible to produce multiple colors that meet market demands, and there are also problems in terms of durability and production.The present invention solves the above problems. The present invention relates to a method for efficiently making decorative items multicolored.

In order to achieve the above object, the present invention forms a colored film on the surface of the material by ion plating, further ion plating a thin film of precious metal of 0.5μ or less within the same surface treatment layer, and then wet plating the entire surface. This is a method for making ornaments multicolored, which is characterized by applying a noble metal, then masking a part of it according to a predetermined pattern, and dissolving and removing the noble metal layer, including ion plating that is not masked.

Suitable materials for use in the present invention include titanium, titanium alloys, stainless steel, nickel-chromium alloys, copper alloys, and other materials that can be used for high-grade decorative products.Colored coatings based on titanium and titanium alloys include, for example, TiN. Golden color, Ti
The mixture of N/TiC/TiO has a blackish tone, and C
When the base material is r, Cr alloy, for example, CrN has a gray color tone, and when the base material is V, Nb, Zr, or an alloy thereof, the color tone is approximately similar to that of the alloy.

This will be explained in detail below with reference to the drawings.Titanium,
These compounds, such as titanium alloys, stainless steel, nickel-chromium alloys, copper alloys, etc., are coated on the material shown in A in Figure 1.Depending on the composition of the compounds, coatings of various colors can be formed. Obtainable.

The thickness of the coating is preferably in the range of 0.1 to 1.3 microns. Next, in the same apparatus, as shown in B in Fig. 1, ion plating of gold, gold alloy palladium, and palladium alloy noble metal thin film ① of 0.5μ or less is performed, and then C in Fig. 1 is applied. As shown in Figure 2, for the purpose of multicoloring, wet plating of a precious metal having a color tone different from that of the colored coating is applied to a thickness of 0.3 to 3.0μ, and then According to a predetermined pattern as shown in D in Figure 1,
Perform masking to provide mask ■.

Masking in this case is performed by brush painting, screen printing, etc., and is carried out with consideration given to the type of pattern and the shape of the surface. Next, as shown in Fig. 1 E, the exposed wet precious metal plating layer ■ is dissolved and removed, and finally the mask is removed, and as shown in Fig. 1 F, the colored layer A multicolored pattern consisting of the coating (1), the noble metal ion plating thin film (2), and the wet precious metal plating layer (2) is obtained.

(Conventional Method) In the conventional multicolor method using a colored film and wet plating, gold plating such as gold plating is first applied by wet plating, and then a colored film is formed by an ion plating method. Furthermore, methods have been implemented to obtain multicolored ornaments by excluding the mask, but the major problems are (1) since the mask is an organic material, there are 250 to 400 particles in it.
℃, gas is generated, which adversely affects quality such as color tone and adhesion. (2) Since ion plating is performed after masking, the film adheres to the top of the mask, so the final It is difficult to peel off during the process, making it a difficult task.

(3) Since precious metal plating is also attached under the colored coating, the price becomes high.

There were several shortcomings, and improvements were desired.

(Effects of the Invention) According to the present invention, since masking is performed in the step after ion plating, the above-mentioned drawbacks are improved, and high-grade decorative items can be produced in various combinations of colors, such as gold-gold, black-gold, Gold-white, gray-gold, gray-white, etc. can be obtained, and the usage fee for precious metals is lower than with conventional methods.
In addition, the process is simplified, and the defect rate is reduced, resulting in a significant reduction effect.

(Example-1) FIG. 2 is a schematic diagram of the ion plating apparatus used in this case, and is one example of the ion plating apparatus used in the present invention.

Eyeglass frame material suspended from a cursor electrode in a vacuum chamber■
An evaporation source board (2) equipped with a heating means is disposed on the opposite lower side and is connected to a DC power source (2), so that the evaporation source board (2) is heated and controlled to a desired temperature by the heating power source (2). FIG. 3 shows an enlarged view of the eyeglass frame material ■. Using Ti as an evaporation source and nitrogen and acetylene gas as reaction gases, Ti is evaporated by an electron beam and the deposition rate is controlled to approximately 0.01 to 0.02 μ/min, and a vacuum of 10-2 to 10-6 Torr is used. Perform ion plating for about 30 minutes below, and
A dark black film with a thickness of 0.4 μm was formed on the i material. Furthermore, the flow rate of the reaction gas is restricted, and the degree of vacuum is reduced to 10-4 to 1.
It is set to 0-6 Torr and put into the evaporation source board■2
g of Au-Pd20Kt alloy was heated and melted and evaporated for 3 minutes to deposit a gold alloy film of 0.05μ. Next, it was taken out from the vacuum container and 20Kt was removed using the wet plating method.
1 μm of Au-Pd-Cu alloy was electrodeposited. Follow A
The part was masked with acrylic paint, immersed in gold stripping solution, the gold plating layer was dissolved and peeled off, and finally the mask was removed. As a result, the part ■ in Figure 3 is gold, and the rest is dark black. A high-quality eyeglass frame made of the combination was obtained. After repeating the process 10 times with a lot of 40 sheets, the defect rate was 0%. In the conventional method, 40
This was a significant improvement compared to when only about 50% of defects occurred, and this greatly contributed to cost reduction.

(Example-2) About glasses made of stainless steel material (Example-1)
When treated in a similar manner, similar good results were obtained.

(Example-3) In (Example-1), only nitrogen gas was used as the reaction gas, a golden film was created, and a pure Pd alloy was used instead of the Au-Pd alloy, and Pd was 0.1 μm thick. A coating of Pd is formed in place of the Au-Pd-Cu alloy plating.
-2μ of Ni (80% Pd) alloy plating was electrodeposited. Thereafter, the product was dissolved and peeled off in the same manner as in Example 1, and multicolored glasses with an elegant appearance and a high-quality appearance were obtained.

As described above, according to the method of the present invention, multicolored ornaments can be obtained easily, efficiently, and inexpensively.

[Brief explanation of the drawing]

Figure 1 Film lamination cross section Figure 2 Ion plating device Figure 3 Eyeglass frame

Claims (3)

[Claims] Claim 1: Form a colored film on the material by ion plating, further form a thin film of noble metal of 0.5 μm or less in the same treatment layer, and then perform noble metal plating on the entire surface by wet method (preferably). 0.5 to 3μ), then a part of the layer is masked according to a predetermined pattern, and the precious metal plating layer, including ion plating without masking, is dissolved and removed. Method Claim 2: The colored coating is TiN, TiC, TiO,
CrN, CrC, CrO, ZrN, ZrC, ZrO, V
Various methods for producing ornaments characterized by gold, black, pink, etc., consisting of n, Vc, Vo, NbN, NbC, NbO alone or in combination [Claim 3] The wet plating includes gold alloy plating such as Au-Ni, Au-Co, and Au-Pd, and white precious metal plating such as Pd, Pd-Ni, and Rh. Method described in section