Since the invention of glass, people have put a lot of effort into making this fragile transparent material durable, and beautiful, and safe (because flying fragments can cause many troubles).
нема Many variants of additives used in the production of glass, providing certain qualities (anti-shock, fire resistance, etc.) and window designs (multi-layer reinforced glass, stained-glass windows, etc.) have been tried.
But the simplest and relatively inexpensive solution was a window film – a material applied to the glass and representing a multi-layer composite, the basis of which is lavsan (polyester) – a high molecular synthetic compound. This initially transparent material can be painted in any color chosen by the customer.
In addition, by applying extremely thin layers of various metals (aluminum, silver, gold, titanium, bronze, chromium, nickel, zircon), the film is given certain properties. Manufacturers are able to offer the buyer more than a hundred kinds of films, designed for both protection and decoration.
There are four types of films: sunscreen (tinted), energy-saving, shock-proof (armored) and decorative. On the properties, efficiency, application and application of window films, many myths have been created, which we will try to discredit.
Window film is able to protect furniture from fading.
This is not quite true. Although window films can hold up to 99% of ultraviolet (both have tinted and transparent films) and 78% reduce the thermal effect of sunlight, they are not able to completely protect furniture from fading. But slow down the process really can.
The view from the window, protected by a window film, is distorted – everything seems grayish and fuzzy.
Indeed, a reflective or tinted film prevents an outside observer from viewing what is behind the glass of a house, office or car. But such optical limitations are virtually invisible when viewed from the inside. After all, due to the properties of visual acuity, the person’s eye gets used to ambient lighting and is able to see everything that happens outside the window, without restrictions, even if the film holds up to 70% of the ambient light.
Window film is able to protect against information leakage.
This is indeed so. Mirror film protects against normal visibility from the outside (provided that the level of illumination corresponds or slightly exceeds the level of illumination outside the building). A metal-sputtered film can weaken or reflect microwave radiation (for example, the hazardous radiation generated by various technical means at frequencies above 200 MHz) and protect from the specially organized channels of information leakage.
Window film can protect against hard power effects (bullet, hurricane, etc.).
It depends on what kind of glass it is. A glass with a thickness of ½ “with several layers of protective film used during testing can really protect you from bullets.Only, an ordinary consumer is often offered a product with slightly different characteristics, and the film layer is usually one.This film will be a good protection from accidental damage hit the glass of a ball or a stone bounced off from a lawn mower, a mechanical impact produced, for example, by a child), from vandalism (scratches, graffiti) or attempts to penetrate the house of robbers. tra such a film also protects, prevents the interior from getting into the premises of not very large objects raised by the hurricane into the air, and even during earthquakes, the glass fragments do not scatter, held by the film, but from the direct impact of a tornado that tears roofs from houses and lifts cars, it’s not likely to save your windows.
When choosing a window film, keep in mind that, for example, a film with a thickness of 112 to 200 μm is able to protect against hooliganism (a small object: a bottle, a stone, etc.) .Films with a thickness of 225 μm or higher can permanently detain an attacker, even using special devices (hammer, ax, etc.). There are also glasses and films of protection class A1 (glass thickness – 4 – 5 mm, films – 300 microns), A2 (film thickness – 412 microns) and A3 (680 microns).
In a room on which the film is coated with a metal spray, it will always be too hot.
Wrong opinion. After all, films with metal sputtering reflect thermal (infrared) beams, as a result of which the room does not overheat during the hot season and minimally loses heat in winter. By using the film, you can reduce heat loss by 20-40% and be protected from overheating during the hot season.
If necessary, glass, with a film on it (fireproof or shockproof), it will not be easy to break.
In fact, applying a film of a certain quality can actually localize the source of ignition, so that the damage from the fire will be significantly less. At the same time, since the film is applied from the outside and serves only to keep the glass fragments from scattering, from the inside the window can be easily broken (unless, of course, we are talking about a special anti-shock glass capable of resisting many kinds of mechanical action).
You can apply the window film to the glass yourself.
Indeed, this process is not complicated, but it is necessary to take into account some features that may have a negative impact on the result of the work. For example, a film can easily be stained, making it unusable. Therefore, it is best to turn to experienced professionals who are familiar with various methods of preventing problems with film application.
Toning the car windows is illegal.
Actually, the laws concerning the tinting of glasses in each country are different. For example, in some countries certain light transmission standards have been established (at least 75% for windshields and 70% for front side windows), and it should be noted that a damaged, scratched glass initially has a light transmission of less than 100%. In the US, the windscreen is not to be toned, but the side and rear windows – please, as many as you like. Therefore, intending to tint the glass of your car, be sure to find out from the dealer whether it is legal to apply a film possessing certain properties, in this particular case, or to familiarize yourself with the relevant laws on toning glasses.
Film application on the car glass is a long procedure.
Much depends on the model of the car and the amount of work, but, in any case, a qualified specialist will spend no more than one and a half – two and a half hours.
Film on the car glass is applied from the outside.
Absolutely mistaken opinion – the film is applied from the inside, from the outside only the glass is heated for better fit and more even shrinkage, and the film is cut.
Immediately after the application of the window film, you can assess the quality of the work of specialists.
Please note that immediately after application of the film, the glass appears cloudy due to small water bubbles. This process (which is an integral part of bonding) is called “shrinkage”. It takes up to 30 days to completely shrink (ie, disappear from turbidity), all depending on the weather conditions and the type of film (the longest dry protective films with dusting dry). The duration of the process is explained by the fact that the water remaining after application and causing turbidity should evaporate through the film. Therefore, the quality of work should be evaluated only after the final shrinkage of the film.
The glass on which the protective film is applied can be washed and cleaned after a day.
No, you should not hurry. It is possible to clean the film only after it has completely dried and shrinks, using a usual soap solution (best not very concentrated) or any glass cleaner, even containing ammonia (however, this substance should not be left on the film for a long time).Abrasive cleaners and industrial concentrated wipers for cleaning the film are not suitable, in addition, do not use tools to clean the windows, which can scratch the coating.