JPS598643A - Manufacture of colored mirror - Google Patents

Abstract

PURPOSE:To manufacture a colored mirror (dark mirror) having freely selectable base color and excellent decorative effect, by forming a thin transparent reduced lead nitrate film on the surface of a plate glass, and coloring the coating film. CONSTITUTION:An aqueous solution of lead nitrate is added slowly to an aqueous solution of sodium hydroxide under agitation to obtain a compound liquid. A mixture of 100pts. of a thiourea liquid and about 0.5pt. of the above compound liquid is poured on the surface of a plate glass, and the compound liquid is reduced for about 15min. The glass is washed with boiling pure water, and a mixture of 100pts. of a thiourea liquid and about 250pts. of the above compound liquid is poured on the surface of the glass to effect the reduction of the compound liquid for about 7min. The process is repeated twice to form a transparent film of reduced lead nitrate. If necessary, the film is treated with an adhesive, and colored to a desired color to obtain a dark mirror.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the manufacturing method of so-called dark mirrors, or colored mirrors.

Conventional dark mirrors have weaker light reflectance than regular mirrors, resulting in a relatively dark mirror surface, but due to the manufacturing process, the background color was limited to an achromatic color close to black.

Therefore, although it is decoratively novel and interesting as a dark mirror, it has the disadvantage of being limited in its purpose and range of use.゛An object of the present invention is to enable the background color of a so-called dark mirror to be freely set.

-1- To this end, the feature of the present invention is that the film surface of lead nitrate that is reduced and adhered to the surface of the glass is formed to such an extent that the transparency of the glass is not lost, and that a background color is applied on the film surface. It is.

In the present invention, the first step is to reduce the adhesion of lead nitrate on the glass surface by approximately 0.5
A substantially equivalent solution of sodium hydroxide and lead nitrate at a ratio of /100 is poured onto the surface of the glass and left for about 15 minutes.
After rinsing with boiled pure water, as a second step, the above-mentioned chourea solution and 2.5 times the above-mentioned compound solution were poured onto the glass surface, left to stand for about 7 minutes, and then roughly washed as a third step. By pouring the same amount of solution as in the second step again and reducing it for the same amount of time, a thin transparent film-like reduced lead nitrate film is formed on the surface of the glass.After this drying, the base color is applied. After that, a protective layer is formed.

Next, a specific example will be described.

(Example) Width: 90CII11 Height: 180CI11 Thickness: 5IllI
-2- The surface of the ll plate glass is wiped evenly with a sponge soaked in emulsion-like calcium carbonate to remove oil components and the like.

Dissolve 0.2 g of stannous chloride in 113 clc of pure water, pour this evenly over the surface of the glass, and smooth the surface by gently stroking it with a sponge.

Next, this chemical is gently washed away with 2000 cc of boiled pure water, and the preparation process for adhering lead nitrate, which will be described later, is completed.

A lead nitrate solution prepared by dissolving 33 (I) lead nitrate in 503 C6 pure water is gradually added to a sodium hydroxide solution obtained by dissolving 44A sodium hydroxide in 500 cc of pure water, stirring well to form a compound solution. Create.

A chourea solution 600CO prepared by dissolving 4411 chourea in 1000 cc of pure water and 3 cc of the above-mentioned compound solution of sodium hydroxide and lead nitrate are poured onto the surface of the glass to reduce lead nitrate. This reduction time is approximately 15 minutes.

First, wash away this chemical with 2000 cc of boiled pure water, and at the same time raise the glass temperature.

Next, 200 CG of chourea and 5000 G of the above-mentioned -3- compound solution are poured onto the glass surface to perform reduction for about 7 minutes.

After this, the reduction operation is repeated again using a solution of the same ratio and for the same period of time.

As a result, a thin transparent film of reduced lead nitrate is formed on the surface of the glass (it is important to maintain the transparency of the glass in this state).

After this, drain the water and allow the surface of the glass to dry completely.

In this way, on the lead film surface of transparent glass,
First, spray adhesive material (trade name: Michacron, etc.) evenly with a spray gun.

Then, as a base color paint, dilute the product name: Dieless Blue by about 1.5 times with acrylic lacquer thinner, and spray it with a spray gun, and apply the product name: Acrylic Power with Miramin Thinner as a retaining layer on the surface. It is formed by spraying and painting the diluted product.

The reduced lead nitrate film is attached to the glass to maintain its transparency, so no matter what color the ground color -4- paint is, it will pass through the glass and the ground color will stand out. .

In this regard, in the past, the reduction time was too long and it was not possible to maintain the transparency of the glass, so no matter what color was chosen as the background color, the result was a limited background color that was close to an achromatic color. be.

As described above, in the present invention, a reduced film layer of lead nitrate is formed on the surface of the glass while maintaining transparency, and the ground color is colored on the surface. Various ground colors can be freely highlighted, further enhancing the decorative nature of dark mirrors, and increasing their uses.
This has the effect of greatly expanding the scope of use.

-5-

Claims (1)

[Claims] In a method for producing a colored mirror, in which a reduced film of lead nitrate is formed on the surface of a plate glass, and then the surface is colored with a ground color,
A method for manufacturing a colored mirror, characterized by forming a reduced film of lead nitrate in the form of a thin transparent film.