JPS63225203A - Dark mirror and its production - Google Patents

Abstract

PURPOSE:To easily and inexpensively produce a dark mirror requiring no reflective metallic film layer by constructing the dark mirror with a transparent plate comprising a rigid material, a transparent layer having an appropriate thickness coated on the rear surface of the transparent plate, and a dark colored layer coated on the external surface of the transparent layer. CONSTITUTION:After removing oils or fats, contamination, etc. on the rear surface of a flat glass 1 having sufficiently smooth surface and high reflection efficiency by washing with a detergent soln., etc., the glass 1 is dried at high temp. in a short time. Then, a colorless or colored transparent synthetic resin ink or ultraviolet ray-setting synthetic resin soln. having photosensitivity, etc. is coated on the rear surface of the glass 1 to an optional thickness by screen printing or spray coating, etc., thus, a transparent layer 2 is formed by drying and setting the coated material. Further, a dark colored layer 3 is fixed by coating the external surface of the transparent layer 2 with a dark (black or violet, etc.) synthetic resin ink or paint by a screen printing or painting process, and drying and setting the coated material. By this process, a dark mirror requiring no metallic film reflective layer is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a dark layer and a method for producing the same.

[Conventional technology]

Conventional mirrors are used as mirrors by installing a metal layer on the back side of a flat transparent glass that blocks the passage of light and portraits and reflects them by processing with gold and silver such as mercury or plating with metal vapor deposition. It has been manufactured using well-known methods such as silver coating, metal plating, and metal vapor deposition.

[Problem that the invention seeks to solve]

When a clear image is required, a conventional mirror is suitable, but when a specific usage requires cutting off some of the light rays and using only the reflection efficiency of the glass surface. For mirrors manufactured using conventional methods, it is necessary to install an attenuation filter or the like on the surface, or to use a complex structure such as a prism method to reduce and reflect light.

[Means for solving problems]

The present invention solves the above-mentioned complicated structure by providing a means that does not require the process of providing a reflective layer of a metal film by silvering processing, metal fitting Φ, metal vapor deposition, etc., and easily and inexpensively meets the requirements. This is an attempt to respond to the following.

〔Example〕

To explain the embodiments of the present invention in the order of steps, first, the back surface of the flat glass (1), which has a smooth surface and good reflection efficiency, is cleaned of oil, fat, dirt, etc. using a cleaning liquid. Dry in a short time.

Thereafter, a colorless transparent or colored transparent synthetic resin ink or a photosensitive hardening synthetic resin liquid containing an ultraviolet absorber is applied to the back side of the glass (1) by screen printing, spray painting, potting method, etc. A transparent layer (
2) Form.

Next, a dark synthetic resin ink or paint, such as black or indigo, that prevents the passage of light or images, etc., is applied to the outer surface of the transparent layer (2) by screen printing or painting, and is dried and cured. This fixes the dark layer (3). Furthermore, in order to increase the adhesive strength of the dark layer (3) and remove impurities, the finished product (a) is obtained by heating at an appropriate temperature.

In addition, in the present invention, the transparent layer (2) forms a surface with coarse particles of pigment contained in the ink, etc. for forming the dark layer (3), and absorbs ultrafine light rays, images, etc. from the reflective surface. However, by installing this transparent layer (2) to an arbitrary thickness, a good reflective surface can be obtained.

Furthermore, the present invention requires that the synthetic resin ink for forming the dark layer (3) be used as a paint, etc. in a semi-transparent or slightly bright color, and that a hard transparent plastic plate be used in place of the glass plate (1). It is also possible to use a transparent layer (2
) by adding chemicals such as ultraviolet absorbers to the mirror, which cuts out wavelengths of light that are harmful to the eyes, and the light on the back side changes the absorption rate of the image and adjusts the reflectance of the mirror as desired. It is possible to use it.

FIG. 3 shows a different embodiment, in which the entire surface is bound in a curved shape.

[Function] and [Effects of the Invention] Since the present invention has the above-mentioned features, it does not require a step of providing a reflective layer of a metal film by silvering, metal plating, metal vapor deposition, etc. It has excellent effects that can fully achieve the objectives of the period.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway front view showing the finished product, Fig. 2 is a sectional view taken along the line A-Afi in Fig. 1, and Fig. '3 is a separate view. FIG. 7 is a cross-sectional view showing a different embodiment. (1)...Glass, (2)...Transparent layer, (3)...
・Dark layer. Figure 1 Figure 2 (1)...Glass (2)...Transparent 1 layer

Claims (1)

[Scope of Claims] 1. Printing or spray painting of a flat or curved transparent plate made of a hard material such as glass or hard plastic, and a transparent material such as colorless transparent or colored transparent ink, paint, or photosensitive hard synthetic resin liquid. Alternatively, a transparent layer of an appropriate thickness is formed by coating the back side of the above-mentioned transparent plate by means such as potting, and a dark color material such as black, indigo, or other dark color ink or paint is applied by means such as screen printing or painting. and a dark layer formed by coating the outer surface of the transparent layer described above. 2. Apply a transparent material such as colorless or colored ink, paint, or photosensitive curable synthetic resin liquid to the back side of a flat or curved transparent plate made of a hard material such as glass or hard plastic by printing, spray painting, potting, or other means. A transparent layer is fixed on the back side of the transparent plate by drying and curing, and then black, indigo, and
A method for producing a dark-colored mirror, characterized in that a dark-colored layer is fixed by applying a dark-colored material such as another dark-colored ink or paint by means such as screen printing or painting, and drying and curing.