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2.X.O. runs impact test on its high-grade edge-to-edge tempered glass.
We use only the highest grade of Japanese quality sheets of 0.33mm
glass. Our edge-to-edge tempered glass is tested for front impact only.
Lateral impacts, exercising a force from one edge of the glass toward its
center, are not tested; we do not provide any explicit or implicit warranty
for such impacts and tempered glass is not considered having any specic
resistance quality against such lateral force. We test our tempered glass
resistance to front impact by dropping vertically a metal ball weighting
110 grams = 3.8 ounces onto the surface of our product from a height of
120 cm = 3.9 feet, matching normal drop conditions for an adult, and this
is what is considered normal usage. Dropping your smartphone from the
top of a bridge, a oor of a building, the top of a stairway, etc. does not
constitute normal usage conditions for this product.
3.Resistance to scratches of a given material is technically tested by
measuring its hardness. Most of our competitors advertise loudly on
their packaging that their products feature a “9” hardness (supposedly
on the Mohs hardness scale from 1 to 10, 10= hardness of diamond,
the hardest natural mineral found on earth). Frederic Mohs, a German
mineralogist, created this scale in early 19th century. It simply consists
of applying force of one of the 10 dening materials against the tested
material. If the force exercised leaves a trace of the dening material, it
means the tested material is harder than the dening material. If the test
results in leaving trace of the tested material it means it is of a lesser
hardness than the dening material. But it is physically impossible that
any tempered glass ever reaches the score of sapphire or corundum, the
mineral that denes the 9 score on Mohs scale. Besides, all tempered
glasses for smartphones are made of a sandwich of different layers,
the outer layer (the one that should be scratched for testing material
hardness) protecting the tempered glass layer, being a plastic derivative
used as an oleophobic coat. Plastics are not minerals, therefore cannot
be measured on a mineral hardness scale. This is how irrelevant and
meaningless these “9” hardness scores are. Nevertheless, our tempered
glasses are engineered to be resistant to repetitive, normal and usual
scratches due to rubbing daily against objects against our smartphones
in our pockets, bags, whether they are keys, hair pins, brushes and other
metal and plastic domestic objects we are surrounded by. We call it
“ZERO MHI” for Misleading Hardness Information. Rubbing your phone
tted with a tempered glass against abrasive or sharp tools, chemically
active or corrosive substances do not constitute normal use.