Company description
Equipped with metal computer glasses frames, usable hand gently turn the lens ring or mirror legs, see its degree of hardness and softness, soft found hard, general is based on the material of brass alloy production; Stainless steel hardness is larger; It is hard. High-grade frames using nickel alloy material production, high strength, good elasticity, deformation can be worn for a long time. Optional fiber frame, plastic frame, should be selected in the soft hard material, said very hard plastic, when using a lack of flexibility.
A, see the surface
Try to choose the surface is clear, luster, no scratches, dent, corrosion problems such as frames.
Second, see mark
Normal manufacturer of production computer eyewear frames, in addition to print the article number, specification, size, with a brand (or pinyin, English).
Three, the structure of the watch
Spectacle frame legs away, flat on computer glasses or mesa, lens barrel and its leg tilting 10 ~ 12 degree Angle, two circle to as large as the mirror, the two should be as long as the mirror, two nose to be as high as.
Four, the combining site
Check the hinge of the frame and its leg is consistent. Metal frames have a lot of welding point, to check whether the welding place is strong and agile.
Five, the test frame material
Equipped with metal frames, usable hand gently turn the lens ring or mirror legs, see its degree of hardness and softness, soft found hard, general is based on the material of brass alloy production; Stainless steel hardness is larger; It is hard. High-grade frames using nickel alloy material production, high strength, good elasticity, deformation can be worn for a long time. Optional fiber frame, plastic frame, should be selected in the soft hard material, said very hard plastic computer eyeglasses, when using a lack of flexibility.
