polarized sun - Black - Metal Eyeglasses

Basic information
Place of origin: China
the material of frames: ultra-light aeronautic aluminium & magnesium.
the material of lenses: American TAC Polarized lenses
the frame color: dark gun and black;
lenses color: 2# grey;
Model No. HKA-8001
suitable object: unisex;
fit age: 16 or older;
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Product description
name of commodity: polarized sunglasses made of aeronautic aluminium & magnesium alloy
brand: HOKO
commercial specification:
length: the length of leg is 113 millimeter;
width: the distance between wings of nose is 17 millimeter;
height: the height of lens is 32 millimeter;
the width of front frame is 144 millimeter;
packing list: a pair of eyeglasses, an instructions leaflet, an eyeglasses case, a superfine glass cleaning cloth, a superfine glass cloth bag;
Introduction about materials: lenses: We make use of American TAC Polarized lenses in HOKO glasses. After improved, now it is the third generation of TAC (such as sundog, Gort). After extended, the mechanical property of the polymeric membrane will reduce, and becomes frangible. So after the extension of PVA, both sides should be attached by transparent carrier which is composed of triacetate fiber (TAC). On one hand, it is protective; on the other hand, it prevents retraction of polymeric membrane. Thickness: 0.65mm and 1.0mm. The feature of American TAC Polarized lenses: (1)Anti scuffing: It is more effective in anti scuffing than CAB polarized lenses, more than twice times. (2)The stability of contraction: In sticky weather, the minification is 70% less than that of CAB polarized lenses. (3)Haze: It reaches 0.4%, which is 99.6% less than that of CAB polarized lenses. (4)Quality: Tested by standard boiling water test to make sure there is no separation within 60 minutes. (5)The thickness of lenses: The 1.0 mm lenses are more pliable but b than 1.0mm lenses of CAB. (6)It is very suitable to add film coatings.
the polarized lens is a kind of material with seven layers, two outermost layers are abrasionproof, the second and sixth layers are anti-UV, the third and fifth layers filter the harmful rays, the middle layer is polarizing one. As for good lenses, when in design, the most important task is to filter ultraviolet radiations. And then block glare.
Polarized lenses are able to filter glare which makes drivers see clearly without fatigue, filter the sparkling on water surface which lets fishermen see fish rise to the bait, increase color saturation which makes travelers be more pleasing in seeing scenery, filter the split vision so that to do activities in a safer situation.
Frames: HOKO frames are made of ultra-light aeronautic aluminium & magnesium which is quite light in weight. It is 1/2 lighter than copper, 1/3 lighter than stainless steel. High hardness, its surface is similar to ceramic tile, as hard as steel.