Oleophobic Coating Test
Oleophobic coating offers a certain amount of finger smudge resistance to the smartphone’s display. Therefore, using a common soft cloth you can easily wipe out the dirty things and leave the cellphone as brand new.
Usually, Oleophobic Coating can be divided to 3 kinds of crafts: smear by hand, sprinkle by machine and electroplate. There is no glass protector with complete anti-fingerprint function. The best electroplate effect can last two months, while the type smear by hand can only last a few days.
Water-drop on Type A gathers around itself and stays in an almost spheric form, while Type B just splats on the display, it has poor anti-fingerprint performance.
Observe the lines drew on the protector by water-based marker. we can see it automatically gathers as water-drop shape, which can be easily cleaned with dust-free cloth.
Quality of AB Glue determines whether the Tempered Glass Screen Protector can automatically adsorbed onto the screen without any bubble and edge warping. AB Glue with good performance can be removed and installed for several times.
Type A Tempered Glass Screen Protector with high tenacity can be bent to 360 degree, while
Type B is cracked when bended more than 135 degree.
Drop the ball successively from small to big size, from low to high to test the impact-resistant performance of the protector.
Anti-shatter function can protect the screen and user’s safe from glass shattering. When the glass was broken,
Type A with dense cracks has no glass shatters;
Type B with sparse cracks has some glass shatters.
Visible light (550nm) test value can reach to 90 and above.
Generally, Tempered Glass Screen Protector is consisted of 4 layers: Nano-structured Coating, Tempered Glass, Explosion-proof Film and Silicone Coating(AB Glue).
Thickness indicated on the packages usually refers to the single tempered glass, other layers are not included. Single tempered glass thickness ranges from 0.15~4mm in the current market, AB Glue is 0.085~0.15, therefore protector in 0.1mm is almost unlikely to achieve.
Values in the picture is the overall thickness of Tempered Glass Protector.
Moh’s hardness was usually to be taken as the reference index of scratch, screen scratch could be happen when the material’s hardness is higher than Moh’s hardness. According to the theory of Moh’s hardness:nail is 2.5, aluminum and copper is 3, iron is 4-5, stainless steel is 5.5, simple glass is 6, Corning Gorilla Glass is 6.5, special glass is near to 7, quartz (main ingredient of sand) is 7, topaz is 8,corundum is 9 (ruby and sapphire), diamond is 10.
Tempered glass is also a kind of glass, so it’s Moh’s hardness should between 6 to 7, in theory, tempered glass will not be scratched by the knife and key.
Many Tempered Glass Protector suppliers mark 9H hardness on their product packages. Actually, this so-called 9H refers to the hardest degree of pencil. According to the Moh’s hardness, it can not beyond the sharpener(5), so every piece of glass can reach the 9H and above.
Touch Function Test
Comfortable touch and smoothly move without any resistance.
Dust, dot, scratches, bumps, bubble, paint,
button hole accuracy inspection.
Is it of necessity to equip a tempered glass protector for your love phone? Sure. Though the functions don’t seem that powerful as most of suppliers describe, tempered glass protector is a must have accessory for smart phone due to its features of smudge proof, anti-scratch, safe, durability, price etc.