JPS63157884A - Production of composite metallic sheet for decoration having surface pattern - Google Patents

Abstract

PURPOSE:To obtain a composite metallic sheet having a polychromatic complex surface pattern, by cladding a metallic base layer with a multilayered metallic thin film having various color tones to form a clad material and by subjecting the surface of the metallic thin film of the clad material to chemical partial etching. CONSTITUTION:A metallic base layer is clad with a multilayered metallic thin film consisting of plural kinds of metals including a noble metal and having different color tones to form a clad material. An etching soln. such as a KCN soln. is irregularly dropped or sprinkled on the surface of the thin metallic film of the clad material and the soln. is held for a prescribed time to partially etch the film. Thus, a composite metallic sheet for decoration having a polychromatic complex fine surface pattern is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a decorative composite metal plate that is colored in a plurality of different tones and has a surface pattern that is rich in variation.

[Conventional technology]

Generally 1 watch band, bracelet, lighter.

Accessories and ornaments such as brooches, pendants, buckles, fountain pens, cigarette cases, tie clips, and cufflinks, as well as various crafts, are considered from a decorative and aesthetic point of view.
Since it is preferable to have a surface pattern with multiple color tones, these decorative items can be manufactured using forge welding, roll pressure welding, and explosion bonding methods from multiple types of metal plates and wires in one color. Furthermore, composite metal plates manufactured using processing methods such as extrusion methods are used.

[Problem that the invention seeks to solve]

However, the surface pattern of composite metal plates manufactured by the above-mentioned conventional method is only a simple striped pattern, and the current situation is that the surface pattern is inevitably monotonous. be.

[Means for solving problems]

Therefore, the inventors of the present invention et al. from the above-mentioned viewpoint.

This is the result of research aimed at producing a decorative composite metal plate that is rich in C-heavy patterns and has a surface pattern with high decorative and aesthetic value.

First, a metal clad material consisting of multiple metal thin layers made of multiple types of metals with one different color tone and a metal base layer is molded.

Then, when the surface of the multiple thin metal layers of this metal clad material is partially corroded chemically, a surface pattern appears that is colored in multiple different tones and is rich in C. 1 varies depending on the corrosion method employed, such as a method in which partial corrosion is performed by spraying an etching solution irregularly on the surface, or a method in which partial corrosion is performed using lithography technology. By changing the type and color combination of the constituent metals, the concentration and lubricant of the etching solution used for partial corrosion, the etching time, etc., it is possible to create even more variations and improve the decorative and aesthetic value. We obtained the knowledge that it can be measured.

This invention has been made based on the above findings, and will be specifically explained in Examples below under J/1.

[Example] Example 1 As a metal plate material, plane size = 50rMl x 5
KlS gold alloy plate material with yellow color (composition is 1% by weight, Ag: 1
2.5%, Cu: 12.35%, Au and unavoidable impurities: the rest), the same white KlS gold alloy plate (composition is Pd: 17.0%, Ni near, 85% - Au and unavoidable impurities) ：consisting of the rest), 1 and 1 of the same red color
8-karat gold alloy plate material (composition is -Ag: 5.0%, Cu: 19.
After degreasing the surfaces of these three types of metal plate materials, one color tone alternates in the order of white, yellow, and red. A superimposed body is formed into a color tone combination of the arrangement, and then this superposed body is charged into a normal diffusion welding machine and heated to 800°C while maintaining a degree of vacuum of 2 x to torr, and then heated to this temperature for 1 After soaking for a time, pressurization was started, temperature = 800℃, pressure crab 9 ton
, holding time: 4 hours to integrate by diffusion welding, followed by cold rolling under normal conditions, thickness:
A multilayer metal thin layer material of O, l+mn was prepared separately as a metal base layer material. The K1g heavy alloy plate with a thickness of 20 mm and having the same composition as the above-mentioned yellow-toned K1g alloy plate was laminated with an 18-karat gold alloy plate, joined under the same diffusion welding conditions as above, and further cold-rolled under normal conditions. Thickness: 2mm metal clad material is molded, and this metal clad material is
Each layer consists of a multiple metal thin layer composed of 9 layers of 3 types with a layer thickness of 1 μm and a metal base layer, and then + KCN is applied to the surface of this multiple metal thin layer of the metal clad material.
Etching solution consisting of system solution is sprayed irregularly, 3
The method of the present invention was carried out by holding the sample for 0 minutes to cause partial corrosion.

As a result, the color tone and shape of the etchings varied depending on the location on the surface, and the shape, size, and depth of each partially corroded location varied. . A composite metal plate with an extremely beautiful surface pattern was obtained.

51 Example 2 The method of the invention was carried out under the same conditions as in Example 1 above, except that conventional gluing techniques were used as the partial corrosion means.

As a result, a composite metal plate having a geometric surface pattern rich in color tones unique to lithography technology was obtained. Composite metal plates with rich surface patterns can be produced, and therefore this composite metal plate can be used for the above-mentioned jewelry and decorations.

Furthermore, if it is used in the production of various crafts, its decorative and aesthetic value will be further improved.

Claims (1)

[Claims] A metal clad material composed of multiple metal thin layers made of multiple types of metals with different color tones and a metal base layer is formed, and the surface of the multiple metal thin layers of this metal clad material is chemically polished. A method for producing a decorative composite metal plate having a surface pattern characterized by partially corroding to produce a surface pattern colored in a plurality of colors.