Everything you need to know about screen protectors

by sogrow team

Everything you need to know about screen protectors

Conventional protective films 

The abbreviation PET stands for polyethene terephthalate, a special plastic that is available in different versions depending on the application. In industry, for example, it is used to make plastic bottles or food containers. However, this does not mean that PET films are known as plastic water bottles. These screen protectors consist of a polyester film with a scratch-resistant matte finish on one side and a self-adhesive silicone on the other. High-quality and transparent enough, they offer additional functional protection against scratches but in no way increase the resistance of the screen. Also, its scratch resistance is no better than Gorilla Glass. Which also depends on the protection of nails and coins. The downside is that sunlight and your greasy fingerprints can easily discolour plastic, they don't feel as comfortable as glass, and they often blister.

Safety glass

Toughened protection! Made of high-quality material, safety glass is multi-layered, usually starting with shock-absorbing silicone in the bottom layer, then a PET film and optically transparent glue connecting the previous two layers with the next two, which are made of tempered glass and an oleophobic coating. All this protection against scratches, grease and bumps is compressed to <0.4mm. Sheet thickness is no more difficult to lay than protective sheets.

Protective glass haptically resembles real smooth glass. Unlike Gorilla Glass 3, it resists scratches from the sand. The tempered glass protector has a respectable 8 to 9 hardness, which means the glass is tough enough to withstand scratches, certainly not topaz or corundum (an extremely hard aluminium oxide). However, they cannot be called unbreakable. Being made of tempered glass, the protective glass will take a hit in the event of a direct drop and will be covered with small scratches and may break. And there is even a chance that your screen is intact.

The disadvantage of tempered glass is that it is the most expensive type of protection. Also, due to the high price, there are many fakes on the market, which in terms of parameters are even worse than normal films. Tempered glass is also scratch-tolerant, but chips and cracks often form when knocked and dropped. Glasses are more difficult to make than films, so only the most popular smartphone models are offered for sale. And the protective glass does not extend to the edge of the phone screen and cannot be used on curved surfaces.

Armour Protective Films

TPU (Thermoplastic Polyurethane) is the next link in the food chain for protective films. It is a chemically reinforced plastic with properties such as scratch resistance, elasticity, resistance to grease and grease and greater durability. Although the material is elastic, it has "self-healing properties". This means that its plasticity allows it not to absorb extreme shocks such as light scratches but at the same time to maintain its original structure in its entirety or to a greater extent. Minor scratches generally only leave small dents in the soft plastic, which slowly return to normal.

TPU protective caps are labelled "Military Class". This material was used to "protect combat aircraft". Take a quick look at this aerospace surface protection brochure, and you will see that it is full of references to polyurethane masking tapes used for "Airplane and Windmill Leading Edge Protection".

TPU is the best choice. Offers the best protection against external influences. More comfortable to handle. In addition, you can inform your friends and acquaintances that your phone offers the same protection as fighter jets. Great, isn't it?

There are two ways to apply screen protectors, wet and dry.

With the dry method, the screen saver charges statically. This method does not require glue and is very easy to use. In short, you need to be in a dust-free room (in a damp bathroom, and preferably without additional clothing to prevent dust particles from entering the screen), thoroughly clean the phone screen, line up the protective film and apply it to the phone. After a few tries, you will most likely get a near-perfect result. Most dry glued screen protectors allow you to gently peel them off your phone and remove bumps and dust before putting the film back on. Some films even come with electrified paper to help you get rid of hated stains.

The wet installation of the protective film is done by spraying on a liquid. It is believed that by using the wet method to apply the film, it is easier to avoid air bubbles or dust intrusion and is more durable. If you mess up the installation of the foil the first time, you will also have a second chance to get it right. Shielded sheets are completely bubble-free during the day due to their "breathing" properties.


Today there is a large selection of different foils and glasses, but the best option is TPU armour protection foils. For a reasonably low price, you can get excellent, long-lasting quality for your display.