LT4207B - Method of decorating a mirror on the back - Google Patents

Abstract

Invention is intended for the decoration methods of glass surfaces and a production method of mirrors with various decorative colour effects in particular. The invention aims to simplify a technological process, increase mirror moisture resistance, and expand a scale of decorative effects. To achieve the aim, drawings are done on the reverse side of the mirror, removing from the mirror's surface a reflection layer by a sandblaster and coating the treated areas by nitrocellulose enamels.

Description

The invention relates to methods of decorating glass surfaces, more particularly mirrors with. various decorative color effects for the method of obtaining.

There are many different ways of decorating glass surfaces using mechanical, chemical and mixed means.

A known method of applying decor on a glass surface using a liquid paint varnish. The mixture is applied on the glass surface by means of compressed air (see US Patent No. 5061658, C03C.17 / 32, B44C 1/00, Ι992 _ο 03 · Ι9). has no spherical reflection.

The closest to the proposed one is the mirror decoration method, where drawings, notes are made on the reverse side of the mirror e, removing the reflective layer of the mirror surface by laser beam. The laser beam penetrates the glass surface without damaging it (see German Patent No. 402275 »TPK B44P 1/04, C03C 17/38, 23.01.1992),

The disadvantage of the known method is that it uses expensive laser technology to remove the mirror reflective layer, so the processed mirrors are not resistant to moisture, and there is a limited range of decorative effects.

The purpose of the claimed method is to simplify the technological process, increase the resistance of the mirrors to atmospheric influences., (Humidity), expand the scale of decorative effects.

-2EN 4207 B

The object is achieved by removing the reflecting layer of the mirror surface by a sandblasting machine at a pressure of 6-8 atm and applying nitrocellulose enamels to the treated areas in the known mirror decoration method, where the drawings are performed on the reverse side of the mirror.

The following examples illustrate the method:

Example I

Performs reverse printing on the reverse side of the mirror e «Uses stencils to get the desired drawing. The reflective layer on the mirror surface is removed by sandblasting. Sandblast pressure to surface 6 atm. At first, the stream of sand is sprayed into the area to be decorated with a larger radius until the protective paint layer is removed, then a smaller one until the silver film is removed. Apply nitrocellulose enamels NC 221, NC 222 to the surface of the surface so treated. Dye 3 coats of each coat for 3-4 hours. 22-24 ° C. After drying the decorated areas, cover the entire reverse surface of the mirror with nitrocellulose enamel and dry for 24 hours. Using a variety of stencils and colored enamels, you get a pattern that has a smooth, evenly colored color reflection on a mirror background. ''

The moisture resistance of the mirrors is determined by the duck GOST-u 17716-91. Tests are performed on hydrostat G-4, where the specimens are positioned vertically 20 mm apart. The tests are carried out according to the accelerated procedure according to the regime: 95-100% relative humidity, temperature 55 · + 5 ° C, 7 hours exposure. The mirrors are then removed, dried, cleaned and inspected. The mirror shall pass the test if there are no spots on the reflecting surface but on fragments of the protective surface. Moisture resistance is assessed visually using a 10-point scale for clarity.

The qualitative characteristics of the colored decor surface are determined visually. In the case of a mirror with a smooth décor and a reflective surface with a smooth and shiny surface, this characteristic shall be evaluated as 10 points for a matt surface of 5 points.

-3EN 4207 B

Example 2

The drawing is done as in fig. I, only the pressure of the sand current to the treated surface at 7 atm. The qualitative properties of the decorated mirror are investigated as in Fig. ₀ I

Example 3

The drawing is done as in fig. mass on the surface to be treated 8 memory properties are determined as Fig.

I, sandblasting onlyDecorated mirror quality I

Example 4

The drawing is done as in fig. I, only sand current pressure to the treated surface 9 atm. The qualitative properties of the decorated mirror are set as in Fig.I

Example 5

The drawing is made as in Fig. I.Spray pressure applied to the surface to be treated 7 atm _{0 The} treated surface is coated with oil-synthetic paint MAoPainted 3 times, each layer dried for 24 hours at room temperature. Determines the qualitative properties of a decorated mirror as in Fig.I

Example 6 (prototype)

Drawing done by laser beam. The qualitative properties of the mirror are determined as in fig. I

The sample data is shown in the table. As can be seen from the table, the mirror surface treatment mode is selected optimally. Reducing the sand jet pressure to the work surface by less than 6 atm increases the film removal time by increasing it to over 8 atm, resulting in an uneven reflective surface. The glossy, glossy reflective surface of the decor is obtained using nitrocellulose enamels. These enamels dry quickly, which shortens the process, adheres well to the glass surface and is moisture resistant. The use of oil-based paints results in a longer technological process, as these paints have a long drying time and a matte finish on the reflective surface of the décor.

It should be noted that mirrors treated in a claimed way are decorative, lightweight frames that do not need them, as the décor around the perimeter of the mirror mimics a frame with a spherical reflection.This processed mirrors are 2 times more resistant to moisture and can be used in a variety of interior spaces. as a fixture »Using a variety of designs and color enamels on the reverse side of the mirror produces mirrors with a whole new visual quality"

Claims (1)

DEFINITION OF INVENTION Reverse Mirror Surface Decoration Method, in which drawings are performed on the reverse side of the mirror by removing the reflective layer of the mirror surface, characterized in that this layer is removed by a stream of sand at a pressure of 6 to 6 atm and the treated areas are coated with nitrocellulose enamels.