Colorless Round Cat Eye Glasses lenses commonly known as white plate, also known as white. Can be divided into ordinary and optical white two. The main composition of ordinary white Cute Round Glasses plate is sodium calcium silicate system, refractive index is 1.51, the transmittance of visible light is more than 89%, can absorb ultraviolet light below 280nm. The main composition of optical white sheet is sodium-calcium silicate system, refractive index is 1.531, Abbe number is 60.5, light transmittance Round Cute Glasses is above 91%, uv protection performance is the worst. UV optical white is in the optical white composition to add a small amount of titanium oxide and cerium oxide, so that it has the performance of ultraviolet absorption, refractive index is 1.523, Abbe number 58.7, transmittance is 91%, can absorb 330nm below ultraviolet. And good mechanical properties and chemical stability, is widely used at home and abroad a kind of ultraviolet absorption white high quality Black Round Glasses lens.
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