Following our previous post offering an exclusive opportunity to witness the entire production of screen protectors in a China tempered glass screen protector factory, this post is dedicated to offering you a complete guide to import tempered glass screen protector from China.
Table of Contents
Why do you need a screen protector?
The cost of replacing your smartphone’s broken screen is at least tenth or twenty times more than what a screen protector costs. Why not invest a few bucks to protect a smart phone that can cost several hundred or thousand bucks and save future hassles?
The benefits of importing tempered glass screen protector from China
An extra layer of tempered glass is essentially effective to protect your phone from falls and drops, cracks and scratches. There’re a few pros contributing to its soaring popularity.
* Strong protection function
Tempered glass has to go through a special process of tempering, retaining resilience against potential damages. Besides, it’s also anti-water, anti-heat, anti-oil, anti-fingerprints, making it the second to none guard for your valuable daily essential.
* Better touch
A good tempered glass screen protector features almost the same touch of your original phone screen. As your finger glides, you can enjoy the same level of seamless feel and performance.
* Reduced glare
An advanced technology is used in manufacturing tempered glass that can great reduces the consistency of reflected images from smartphone’s screen. Thus, users tend to feel more comfortable with reduced eye tension.
Understanding tempered glass screen protectors
* Thickness
* Cutting methods
* Oil repellent coating
* Glue spraying
* Full coverage vs. Partial coverage
* Tempering processes
* Shatterproof
* Grade of transparency
* Grade of hardness
* Packing accessories
Thickness
Tempered glass with thickness of 0.2 mm, 0.3 mm and 0.4 mm is in general, considered a bit level up in quality, and it’s the most sought after. A few rules come into play when it comes to differentiating quality grades of tempered glass.
* The thinner, the better
* Thinner tempered glass features better transmittance quality
* Thinner tempered glass is more effective against falls and drops
Cutting procedures
Tempered glass has to go through a few steps of cutting processes to retain maximum quality. Usually three processes of cutting are involved.
* Flat edge
In this step, tempered glass is accurately cut into desire size at right angle.
* 2.5D arc edge
Afterwards, the tempered glass will go through another process of chamfering using glass sweeping machine so as to build a smooth touch.
* 3D arc edge
Hot bending machine will come into play in this process.
Other advanced levels of cutting like 4D, 5D, 9D and 10 D are also used in products requiring better value and quality.
Oil repellent coating
Also referred to as oleophobic coating, oil repellent coating is widely used to manufacture smudge resistant touch screens. It can be done in two ways: machine spraying or artificial spaying. The way how oleophobic coating is applied sets the quality apart. Machine spraying is the most preferred for high end tempered glass, while artificial spraying is a much cheaper alternative for products with tight budget.
Glue spraying
AB glue is usually sprayed to keep way dusts and stay bubble fee. Generally, the thicker the AB glue, the better the performance.
Full coverage vs. Partial coverage
Full coverage screen protectors refer to curved tempered glass with maximum edge to edge protection.
Different from fully covered screen protectors, partial coverage screen protectors usually cover only the display pixel area.
Tempering process
Glass screen protectors have to go through a tempering process of heating up for 4 hours and rapidly cooling off, improving the hardness and resistance of materials.
Shatterproof
Not all tempered glass screen protectors feature shatterproof function, instead, it’s more like an advanced function for high end screen protectors with prices a bit level up. With shatterproof functions, the glass will not break into pieces or even fly out against damages.
Grade of transparency
A rule of thumb, the higher the transmittance rate, the more transparent it is. The standard transmittance rate is ≥90%.
Grade of hardness
Most tempered glass screen protectors feature a hardness level of 6-7 H. The highest can reach 9H.
Packing accessories
The packaging of tempered glass is usually equipped with a small set of accessories including dust film, wipe cloth and alcohol bag. These are quite handy when it comes to removing dusts, keeping your screen tidy and maintaining the longevity of your smart phone.
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