Composite strength: Currently, all the world's polarizing technology used in optical industry have adopted complex process, composite layer and the PVA layer of weathering and water resistance should be an important indicator of the quality of the role of evaluation.
The general method used warm water immersion test. The length of time on the quality of high and low.
Anti-Scratch: sunglasses during use will inevitably be used by environmental pollution, it is necessary to use glasses cloth, glasses cloth with qualified products, they should not stay in screen printing.
Third, the current domestic and international side lenses polarized lenses the main gaps:
The domestic enterprises are tackling tough problems using hot bending forming process, thick lenses difficult.
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