JPH0683069A - Copper and copper alloy plate photograph and its production - Google Patents

Abstract

PURPOSE:To produce a copper and copper alloy plate photograph having various metal colors and excellent in adhesion strength and weather resistance. CONSTITUTION:A photosensitive film of photosensitive acryl resin is applied on a pure copper plate or a copper alloy plate containing >55wt.% copper. An original picture film produced by usual monochromatic photography or color photography in 40-300 mesh-line range is laminated on the plate and exposed. The copper or copper alloy plate is further developed, treated to harden the film at 150-400 deg.C, coated with benzotriazol or its deriv. having 0.0005-0.2wt.% concn., and further coating with an org. film or mixture of organic material. Thus, the copper and copper alloy plate photograph is produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is made of copper and copper alloys having various metallic colors such as so-called copper color, yellow and silver-white, on which photographs for people, landscapes, etc. are printed. The present invention relates to a photograph of a copper or copper alloy plate having a unique color and atmosphere, excellent adhesion strength between a material and a photosensitive film and excellent weather resistance, and used for appreciation, memorial, decoration, etc. It is a thing.

[0002]

2. Description of the Related Art Nowadays, most people have a camera and can easily release a shutter on various objects to easily obtain a normal photograph printed on a so-called photographic paper. On the other hand, as a special photo, you can see the one printed directly on the metal plate.

[0003]

However, since ordinary photographs are so familiar to us, recently, an increasing number of people want to have a special photograph for each person in a different form. . In this case, for photos,
There's also a way to enlarge and burn it, and make the amount and files to store it fine, but there are many who want to differentiate the photos themselves. On the other hand, as a special case, there is a method of printing a photo on a metal plate, but in this case, for example,
Even if silk printing or screen printing is performed, an original plate for that is required, and if a small number of made-to-order products are made, the manufacturing cost will be high. In addition, for example, when printing a person image clearly and accurately by printing on a metal plate, high technology and expensive equipment for plate making and printing are required, and a custom-made metal plate photograph is easily available. It is difficult to make at low cost.

[0004]

Therefore, the inventors of the present invention have proposed a special photograph different from that of ordinary photographic paper, and a photograph and a manufacturing method thereof that can be made to order at relatively low cost. As a result of research for development, (1) Pure copper and copper alloys containing 55% or more of copper have unique metallic colors such as so-called copper color, yellow, silver white, etc. Are suitable.

(2) A clear and strong photograph is obtained by applying a photosensitive film made of an acrylic photosensitive resin on the surface of the material, and performing a hardening treatment in the temperature range of 150 ° C. to 400 ° C. after development. Can be duplicated on the surface.

(3) When copying an original photograph to a copper or copper alloy plate, by using an original image film prepared in a range of 40 to 300 mesh lines, it is possible to obtain a clear image including reduction and enlargement at a relatively low cost. Can be copied.

(4) 0.0005 to 0.2% of benzotriazole or its derivative is applied to the photographic surface of the copper and copper alloy plate obtained by the hardening treatment, and then an organic material film is applied, It was also found that by coating these mixtures, a copper and copper alloy plate photograph having excellent weather resistance can be finally obtained.

The present invention has been made on the basis of the above findings. (A) A photosensitive film is applied to pure copper and a copper alloy containing 55% or more of a copper content, and an original film is overlaid thereon and baked,
Photographs of copper and copper alloy plates produced through development, hardening treatment, and surface treatment steps for preventing discoloration (b) Using a photosensitive film of an acrylic photosensitive resin, at a temperature of 150 ° C to 400 ° C Photograph of the copper and copper alloy plate described in (a) prepared by performing the film hardening process (c) A film for plate making is prepared at an original scale, a reduced scale or a magnification based on a normal black-and-white photograph and a color photograph. And (a) prepared by using an original film having a mesh line in the range of 40 to 300 lines in this case.
Photograph of the described copper and copper alloy plate (d) 0.0005 as surface treatment to prevent discoloration
Benzotriazole or its derivative in a concentration range of up to 0.2%, and then an organic film, or
Alternatively, it is characterized by the photograph of the copper and copper alloy plate described in (a) prepared by applying a mixture thereof.

Next, in the copper and copper alloy plate photograph and the method for producing the same of the present invention, the raw material, the photosensitive film, the film treatment temperature, the mesh wire of the film and the surface treatment condition for ensuring the weather resistance are limited as described above. The reason for doing so will be explained.

(B) Material From the viewpoint of a special photograph, the color of the material that serves as the base is an important factor. Copper and copper alloys include, for example, copper color of pure copper and high copper alloy, reddish copper color of Cu—Zn alloy, yellow or Cu— (20-30)% Ni alloy and Cu—Ni—Zn alloy. It has various metallic colors such as silver white, and is suitable as a material of the present invention. As a copper alloy, the component range is defined as 55% or more of copper content because it can exhibit the characteristic of metallic color when the copper content is 55% or more.

(B) Photosensitive film and hardening treatment temperature The photosensitive film of an acrylic photosensitive resin has a temperature of 15 after development.
A strong black photographic image is formed on the copper and copper alloy plate by the film hardening treatment in the range of 0 ° C to 400 ° C, but the adhesion strength is weak when the temperature of the film hardening treatment is lower than 150 ° C, while the value of 400
If the temperature exceeds ℃, the photosensitive film forming the photographic image becomes brittle and the adhesion strength becomes weak.
It was set to 0 ° C to 400 ° C.

(C) Halftone of film When the halftone of the original film is less than 40, the sharpness of the photographic image is lowered, while the half of the half is 30.
When it is larger than 0 line, the photographic image tends to be crushed during development, and the brightness of the base material after finishing becomes dark. Therefore, the range is defined as 40 lines to 300 lines.

(D) Surface treatment conditions for ensuring weather resistance Copper and copper alloys undergo discoloration with time when they are used as a base material. In order to prevent this, it is necessary to mix benzotriazole or its derivative with an organic film or to coat it on a photograph of a copper or copper alloy plate obtained by baking. If the concentration is less than 0.0005%, the desired effect cannot be obtained. On the other hand, if the concentration exceeds 0.2%, the adhesion of the organic coating to the substrate is deteriorated, and the weather resistance becomes poor. Therefore, the concentration range was set to 0.0005 to 0.2%.

[0014]

EXAMPLES Next, the copper and copper alloy plate photographs of the present invention and the method for producing the same will be described in terms of odors by examples including comparative copper plate photographs (see Tables 1 and 2).

Thickness: 0.8 mm, width: 450 mm, length: 300 mm, average surface roughness Ra = 0.00.
For the copper and copper alloy plates shown in Table 1 having 8 μm,
Width created by applying a photosensitive film of acrylic photosensitive resin, drying it, and then basing it on a color photo of ordinary glossy photographic paper:
Exposure and printing were carried out using an original film of 210 mm, length: 297 mm, and halftone dot lines of 30 to 350 lines. Next, after development, washing with water and drying, a hardening treatment is carried out in the temperature range of 130 ° C to 430 ° C, and further removal of an oxide film, washing with water, drying, etc. are carried out to expose a clear image in the exposed portion and unexposed For the parts, the texture of the material was revealed. Thereafter, benzotriazole was applied in a concentration range of 0.0004 to 0.240%, an organic resin was further applied, and dried. In addition, all the comparative copper plate photographs are produced under the condition that any one of the manufacturing conditions (marked with * in Table 1) is out of the scope of the present invention. .

The copper and copper alloy plate photograph No. of the present invention thus obtained 1-11 and comparative copper plate photograph No. 1
For Nos. 6 to 6, the background color of the material, the surface condition (brightness, definition) of the entire photographic image, the adhesion strength between the image and the material, the weather resistance, and the like were investigated.

Regarding the adhesion strength between the image and the material, the bending radius of 2 was obtained from the photograph of the finally obtained copper and copper alloy plate.
It was evaluated by investigating whether or not peeling was observed on the photosensitive film forming the photographic image when the film was bent 180 mm at 180 ° and returned to the original state.

Regarding the weather resistance, the obtained copper and copper alloy plate photograph was stored in a constant temperature and humidity chamber of 60 ° C.-85% for 3 months and then taken out, and visually observed for the occurrence of discoloration on the surface. It was evaluated by observing The results are shown in Tables 1 and 2.

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

From the results shown in Table 1, photographs 1 to 11 of the copper and copper alloy plates of the present invention have a metal-colored background such as copper color, yellow and silver white, and the photographic image is clear. It is known that the adhesive strength between the photosensitive film and the material is excellent, and also the weather resistance is excellent. On the other hand, as can be seen in Comparative Copper Plate Photos 1 to 6, when any of the manufacturing conditions deviates from the scope of the present invention, it is clear that any one or more of the above-mentioned characteristics becomes inferior. Is.

As described above, the copper and copper alloy plate photographs of the present invention have various metallic colors, have good copyability with respect to the original photographs, and are excellent in reliability and weather resistance. It has useful features such as being able to meet the demands of various photographs.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Sato 128-7 Ogimachi, Aizuwakamatsu, Fukushima Prefecture Wakamatsu Mfg. Co., Ltd. (72) Inventor Shigeo Kamimura 128-7 Ogimachi, Aizuwakamatsu, Fukushima Mitsubishi Shindoh Wakamatsu Manufacturing Co., Ltd.

Claims (4)

[Claims] 1. A process of coating a photosensitive film on pure copper and a copper alloy containing 55% by weight or more of copper, coating an original film thereon and baking it, and further developing, hardening and surface-treating for preventing discoloration. Photographs of copper and copper alloy plates characterized by being made through 2. A photosensitive film of acrylic photosensitive resin is used,
The copper and copper alloy plate photograph according to claim 1, wherein the film is hardened at a temperature of 150 ° C to 400 ° C. 3. A film for plate making is prepared at an original scale, a reduced scale or a magnifying power on the basis of an ordinary black-and-white photograph and a color photograph, and the mesh line in this case is in the range of 40 to 300 lines. The photograph of the copper and copper alloy plate according to claim 1, characterized in that the obtained original film is used. 4. A surface treatment for preventing discoloration of 0.00
The copper according to claim 1, wherein benzotriazole or a derivative thereof in a concentration range of 05 to 0.2% (wt%) is applied, and then an organic film is applied, or a mixture thereof is applied. And copper alloy plate photo