Solar glass
Sun glass has the following properties : impact resistance, splinterproof, explosion proof, privacy, aesthetics and design, as well as provide protection from ultraviolet radiation, blinding sunlight, listening and saving energy.
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Sun glass
Sun glass is one of the possible colors of glass that is opposed to the penetration of solar energy, there are two types: reflective and absorbing. Absorbing glasses are divided into: pyrolytic coated glass applied during the manufacture of the product (on-line process) and electromagnetically coated glass based on metals, metal oxides and precious metals, applied to the finished product (off-line process).

Traditionally, it is considered that the optimal effect can be achieved with the help of a sun glass, painted in bulk, since its properties are maintained for a longer time. This manufacturing technology involves the addition of dyes, which are metal oxides, to the glass melt during the float glass production process.

Sun glass, painted in bulk
Passes 65-75% of the light, while the infrared radiation is only 30-35%, and the thickness of the sheet affects their ability to transmit and absorb rays. This technology, in addition to a simple change in the color of glass, gives it the properties to absorb light and part of solar energy.
Non-selective coating
Has the property to reflect the entire spectrum of solar radiation, including visible light. The composition of the coating, the layer thickness of 5-30 nm, mainly consisting of elements of the 8th subgroup of the periodic table, includes oxides of chromium, titanium, iron and nickel. The sunscreen effect is based on the ability of the metal to reflect and absorb the energy of the sun. The metal layer can be covered with one or two low-absorbing dielectric layers in order to obtain the effect of interference.
The selective coating
Which is also called "soft," partially reflects infrared radiation and is based on a silver layer 10-20 nm thick, due to the presence of free electrons in silver and shortwave radiation is reflected. To reduce the absorptive capacity and prevent glass from being heated by the sun, additional layers of materials with low absorption, such as zinc, titanium oxide, tin, and others, may be added to the coating. Also, these metals determine the color of the glass. "Soft coating" is recommended for the production of plastic windows, but it should be turned inside the glass.
According to the mechanism of action, sun glasses are divided into three groups:
1. Predominantly reflective surface radiation

The manufacture of glass, which mainly reflects radiation, is characterized by the deposition of a thin metal layer on the surface, which subsequently prevents the radiation from penetrating through the glass. It should be noted that the reflective layers in parallel absorb some fraction of the radiation.

2. Predominantly radiation absorbing surfaces.

In the production of absorbing glass, either metal crystals or metal oxides, which have the ability to absorb solar radiation, are applied to the molten glass mass. In parallel, the glass heats up and gives up most of the heat it receives to the outside space. At the same time, part of the heat transferred inside the room is an undesirable phenomenon, since it increases the energy consumption for cooling the room. "Dark" heat-absorbing glass with a high light absorption coefficient can be very hot, therefore it is not suitable for use in exterior glazing, and it is also undesirable to subject it to uneven cooling or heating.

3. Fully reflective surfaces

A fully reflective transparent glass surface is obtained by applying a successive coating on its surface. Usually the number of covering layers reaches five, four of which are metal oxides, and the 5th working layer is silver. The basis of this technology is the ability of silver to transmit visible light, which is inherent in ordinary glass. If the wavelength exceeds 0.76 microns, silver almost completely reflects all the radiation. In addition, this glass has a good ability to heat insulation, and also absorbs part of the thermal solar radiation, it heats up much less and its sheet characteristics practically do not affect its lighting characteristics.