JPH02254155A - Reddish ornamental parts - Google Patents

Abstract

PURPOSE:To form a thin ornamental film having reddish color by forming an Fe2O3 layer of a specific thickness on the surface of a base material having metallic luster. CONSTITUTION:The surface of an ornament made of Al, stainless steel, Cu, Au, TiN, etc., is polished, and an Fe2O3 film is formed to 0.2-1mum thickness on the surface of the above base material having bright surface with high reflectivity by an electron beam vapor deposition method, an ion plating method, a sputtering method, etc. An incident light (i), such as sunlight, is made incident from the surface of the above film, and then, a part of the incident light (i) is reflected as reflected light (a) at the surface of the Fe2O3 layer and the rest is passed through the Fe2O3 layer, reflected at the bright surface of the base material, and passed through the Fe2O3 layer again so as to be formed into reflected light (b). Since the color tone of the reflected light a+b is changed from bright red to dark red according to the change in the thickness of the Fe2O3 layer, the thin film having various shades of reddish color can be formed on the ornament.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a decorative part that is made by applying a color coating to a predetermined base material and can give a variety of tastes through color variations, and in particular, it relates to a decorative part that is made by applying a color coating to a predetermined base material. This relates to decorative parts used for color coating.

(Background Art) Conventionally, there has been a demand for parts such as watch exterior parts, eyeglass frames, glass decorative parts, etc. to be provided in a variety of colors in order to meet the various preferences of users. . For this reason, coloring is done by applying paint or wet plating on a predetermined base material (component material) made of metal, glass, plastic, etc., but in recent years, metal oxides, Color coatings using thin films made of metal compounds such as carbides and nitrides have also been used, providing decorative parts with a wide variety of colors.

By the way, when using the metal compound thin film described in L for coloring, it goes without saying that the color obtained largely depends on the type of metal compound used as the film-forming material. 11 of the metal compound thin film formed!
Because the color changes depending on the thickness and type of substrate on which the coating is applied, there may be a discrepancy between the desired color and the actual color, or a completely different color. , it sometimes became achromatic.

More specifically, the light incident on the metal compound thin film travels through the metal compound thin film, is reflected by the surface of the base 44, and then travels through the metal compound thin film again and is gradually absorbed before returning to the center. Therefore, when the metal compound thin film is thin, the amount of absorption is small, and therefore a large amount of reflected light returns.On the other hand, when the film is thick, the amount of absorption is large and the amount of reflected light is small.

Metal compound thin films differ in the wavelength and degree of light they absorb depending on their type, and the wavelength and degree of light they transmit and reflect differs depending on the type of base material. Therefore, these thin film materials,
A slight change in the combination of the film thickness and the type of substrate changes the reflected light, resulting in various changes in the perceived light and thus the color.

(Problems to be solved) Under such circumstances, the problems to be solved by the present invention are as follows.
To provide a color decorative part using a metal compound thin film, which exhibits a reddish color reliably or stably, and has a combination of the thin film material, its film thickness, and the type of base material. It is in.

(Solution Means) In order to solve the above problems, the present invention includes:
In the red decorative part, an iron oxide thin film layer with a thickness of 0.2 to 1.0 μm is provided on a transparent or metallic luster substrate.

(Specific configuration) In short, the present invention provides a method for reliably or stably realizing Lj-like colors for decorative parts by using three factors: the film-forming material, its film thickness, and the type of base material. This was completed as a result of intensive research by the present inventors in order to determine the combination of the above, and was done with the aim of ensuring that the decorative parts have a particularly red color. .

By the way, the red decorative part according to the present invention is one in which a thin film layer of iron oxide is provided on a transparent or metallic luster base material, and the thin film layer of iron oxide is made of FczOJ which has been sufficiently Q-oxidized. It must be composed of iron oxide such as Note that even if insufficiently oxidized iron oxide is formed into a film, a red color will not be obtained, but only a black color will be obtained.

This iron oxide (Fe2O2) has a reddish-brown color in powder form, and is a translucent substance in film form, and light transmitted through this iron oxide has a reddish color. Taking advantage of this, FezCL+ is used as a film forming material, and
When a thin film with a thickness of 1.0 μm is formed, a red translucent part can be reliably obtained when the base material is a transparent material such as glass, and a red semi-transparent part can be obtained without fail when a material with metallic luster is formed. When used as a base material, a pinkish color can be obtained.

Additionally, regarding the thickness of the iron oxide thin film, the red decorative component according to the present invention can always have a red color by having a specific film thickness of 0.2 to 1.0 μm. However, the thicker the film, the lower the brightness and the darker the red color becomes. Therefore, the more specific film thickness may be appropriately determined depending on the desired lightness, such as thicker if a dark red color is to be obtained, and thinner if a brighter red color is to be obtained.

However, in the present invention, when the film thickness is thinner than 0.2 μm, there is a problem that the shadow of the base material is large and the shadow is affected by light interference, making the color unstable. Of course, even if the film thickness is thinner than 0.2 μm, depending on the type of substrate selected carefully, a reddish color may appear, but there are also cases where a completely different color such as blue or purple may appear. It's put away. Moreover, if the film thickness is thicker than 1.0 μm, the film becomes black and it is difficult to obtain the desired reddish color.

In the present invention, when the substrate is made of a substance with metallic luster, a pinkish color is obtained because two types of light are mixed. That is, the red decorative part according to the present invention has a structure as shown in FIG. 1, and the upper layer is a thin film layer made of iron oxide. here,
When the base material is made of a substance with metallic luster such as aluminum or stainless steel, when white visible light i such as sunlight is incident on such decorative parts, approximately 2 of the incident light i
0% is reflected by the surface of the iron oxide thin film (interface l) and becomes reflected light a, while the rest of the visible light i passes through interface I and enters the iron oxide thin film layer, becoming light on the short wavelength side. The light travels while being absorbed, is reflected at the interface between the iron oxide thin film layer and the base material (interface ■), and is absorbed again as it passes through the iron oxide thin film layer and exits into the air, becoming reflected light. Therefore, the perceived light is
A and l) overlap to form a-+-b, which is recognized as pink.

As is clear from the explanation in -1-, the base material with metallic luster in the sense of the present invention is one that has a high reflectance for the light that has reached the interface H, that is, the light on the long wavelength side. ,
Preferably selected APs, listed above, S1. J.S.
In addition, Cu, Au, TiN, etc. are also suitable. Furthermore, if you use a base material with metallic luster, you can always get a pink color, but the hue will change slightly depending on the reflectance of the base material. The selection is made appropriately depending on the hue to be obtained.

In order to obtain such a red decorative part according to the present invention, various known methods such as EB (electron beam) evaporation, ion blasting, and sputtering, which are conventionally known as methods for forming metal compound thin films, are used. , a thin film of the desired iron oxide may be formed on a transparent or metallic luster substrate.

For example, when performing EB evaporation, the film forming material is Fe.
In addition to zO1, Fe can also be used.

When using Fe as a film-forming material, deposition is carried out in a 0□ atmosphere, and the evaporated particles of Fe are sufficiently oxidized in such a 0□ atmosphere to form a film on the substrate in the form of Fe2O3. do it like this. If the film formation rate is too fast, Fc will reach the substrate without being sufficiently oxidized, resulting in FeO and Fez.
A thin film like es will be formed and the color will be black, so care must be taken.

(Example) Here, in order to further clarify the relationship between the thickness of the iron oxide thin film and the type of base material and the resulting color, some examples according to the present invention will be described below. Examples and comparative examples will be shown.

Three types of base materials were used: a glass plate on which Aluminum 1 was EB-deposited, stainless steel, and glass, each having a thickness of 0.47 μm and 0.12 μm, respectively.
, a thin film of iron oxide was formed with three thicknesses of 1.8 μm.
A colored decorative part having a total of nine iron oxide thin films was obtained.

Note that the iron oxide thin film is formed using the EB evaporation method.
I did it. At this time, the temperature of the substrate is maintained at room temperature, and the degree of vacuum in the chamber is maintained at l O"'To
Adjustment was made by flowing 0° so that it became rr. Further, FezO3 was used as the film forming material, and the film forming rate was gradually increased from 1 to 10 people/s. The relationship between the film thickness and hue of the obtained colored decorative parts is shown in Table 1.

Table 1 As is clear from the results in Table 1, 0.12μ
With a film thickness of m, the effect of the base material is large and the resulting color is unstable because it is affected by the irradiation of light, and depending on the type of base material (glass or tantalum), unexpected blue or purple This results in hues such as . In addition, the base material (SU
If S) is selected, a pink color can be obtained, but in this case, a minute error in the film thickness immediately appears as a change in color, so there is a problem that strict film thickness control is required.

In addition, for each base material having an iron oxide thin film with a thickness of 1.8 μm, the amount of light reflected from the base material surface is extremely large because too much light is absorbed within the iron oxide thin film. Black color appears regardless of the type of substrate.

On the other hand, 0.47, which is within the film thickness range defined in the present invention.
With a substrate having an iron oxide thin film with a thickness of μm, the influence of the substrate is small, preventing it from being affected by light interference, and the colors that appear are stable. By using a transparent or metallic luster base material, red or pink color can be reliably exhibited because red light is reflected well without too much light being absorbed. .

In addition, when the hardness of the FezC)+ film formed on each of these base materials was investigated, it was Hv 500 to 1()00,
The hardness was sufficient to be used as a decorative part.

(Effects of the Invention) As is clear from the above description, the decorative component according to the present invention has a thin film formed on the target base material 2 whose thickness is 0.2-1.
Since it is said to be 0 μm, if the base material is a transparent substance, it will appear translucent red, and if the base material is a substance with metallic luster, it will appear pink. Therefore, it is possible to have a variety of red colors.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram illustrating the spectroscopy of light when the base material has metallic luster in the red decorative component of the present invention.

Claims (1)

[Claims] For transparent or metallic luster substrates, 0.
A red decorative component provided with a thin iron oxide film layer with a thickness of 2 to 1.0 μm.