JPH0428885A - Ornament with multicolor pattern film - Google Patents

Abstract

PURPOSE:To easily form an ornamental film having multicolored film by forming plural films dissimilar in color tone on the surface of an ornament, etc., and simultaneously carrying out the etching and diffusion of the films by means of laser light irradiation. CONSTITUTION:An ornament, such as a watchcase 1 made of stainless steel, is set in an ion plating apparatus, and, after the inside of this apparatus is evacuated, N2 gas is introduced and Ti is evaporated by means of an electron gun evaporation source and then a voltage is impressed on an ionization electrode to ionize Ti vapor. The ionized Ti is allowed to react with N2 to form a gold-colored TiN film 2. Subsequently, a gray TiC film 3 is formed by changing the atmosphere from N2 gas to C2H2 gas. Part of these films are removed by different depths while changing the position, and also, a diffusion layer 4 of different color tone where the TiN 2 is diffused into part of the base material 1 made of stainless steel and a diffusion layer 5 of another color tone where the TiC layer 3 is diffused into the TiN layer 2 are formed, by which the watchcase on which patterns of multicolor tone are formed can be obtained.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is applicable to accessories such as watches, glasses, and tie pins; and writing utensils; and daily necessities such as handbag clasps, scissors, knives, and Western tableware; and fishing gear and golf equipment. This relates to entertainment items such as entertainment, sporting goods, and other decorative items.

(Prior Art) Multicolor pattern coatings have conventionally been produced using ion plating or wet plating. For example, after forming a lower layer using ion plating, masking is applied partially, forming an upper layer again, and then peeling off the masking material to obtain a multicolored coating.

Alternatively, there is a method of forming a lower layer film and an upper layer film having different color tones, forming a pattern thereon with a masking material, and etching the upper layer film along this pattern to obtain a multicolored film.

(Problem to be Solved by the Invention) In such a conventional method, a multicolor pattern is simply formed using different colors between the upper layer film and the lower layer film, and it is difficult to develop a multicolor pattern film using a wide variety of colors. It was waiting.

(Means for Solving the Problems) In view of the above-mentioned problems, as a result of intensive research, in the present invention, by irradiating a certain coating with a certain laser beam, it is possible to achieve a certain depth with high precision. By taking advantage of the fact that the film can be removed by etching and setting the etching depth to a depth near the boundary layer of the film, a part of the upper film near the boundary layer is diffused to the lower layer or the surface of the substrate, and the upper and lower layers or the substrate are separated. This makes it possible to easily obtain multicolored coatings that cannot be obtained by other means. If the etching is done deeper than the boundary layer, the mixed layer will not appear and the lower layer will appear.

(Effects and operations of the invention) As explained above, by using a laser, etching and diffusion can be performed at the same time, and mixed colors that could not be obtained up to now can be easily formed, providing excellent decorative products. It is possible to do so.

(Example) After setting a stainless steel watch case in an ion plating device and evacuation to 10-'Torr, titanium was evaporated using an electron gun evaporation source, and 40V was applied to the ionization electrode.
TiN is ionized by applying nitrogen gas, and nitrogen gas is introduced to ionize titanium.
A 1 μm thick golden film was formed. Subsequently, the gas was changed to acetylene to form a 0.5μ gray film of TiC.

A portion of this coating was removed and diffused to a depth of 0.5 μm from the surface using a 501 laser beam, and removed to a depth of 0.8 μm by changing the position and scanning speed of the laser.

Also, by changing the position and changing the laser scanning speed,
．． When the coating was removed and diffused to a depth of 5 μm, four-colored coatings were obtained: gray, old-fashioned gold, gold, and whitish gold.

Although the explanation has been given above using ion plating as an example, the same applies to other methods. Furthermore, the same applies to coatings obtained by combining two or more of these methods. Furthermore, although the description has been made regarding a two-layer coating, the same applies to three or more layers.

[Brief explanation of the drawing]

FIG. 1 is a partial cross-section of a watch case according to an embodiment of the present invention. 1 is watch case 2 is TiN 3 is TiC

Claims (1)

[Claims] On a surface obtained by removing a part of a multilayer film with different colors, which was formed on the surface of a substrate by ion plating, sputtering, vapor deposition, or wet plating, at a certain depth using a laser. A decorative article characterized in that a multicolor pattern film is formed by diffusing a portion of the upper layer film onto the lower layer or the surface of the substrate at the boundary between the layers.