Factory made hot-sale Single Prescription Glasses - 1.67 MR-7 FSV High Index HMC optical lenses – Boris

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Our goal is to provide high quality products at competitive prices, and top-notch service to customers around the world. We are ISO9001, CE, and GS certified and strictly adhere to their quality specifications for Single Vision Reading Glasses, 1.71 Lens, Photochromic Anti Rad, We've been confident that there'll become a promising future and we hope we can have long lasting cooperation with consumers from all over the world.

Factory made hot-sale Single Prescription Glasses - 1.67 MR-7 FSV High Index HMC optical lenses – Boris Detail:

Production Details

Place of Origin:	Jiangsu	Brand Name:	BORIS
Model Number:	High Index Lens	Lenses Material:	MR-7
Vision Effect:	Single Vision	Coating Film:	UC/HC/HMC/SHMC
Lenses Color:	White(indoor)	Coating Color:	Green/Blue
Index:	1.67	Specific Gravity:	1.35
Certification:	CE/ISO9001	Abbe Value:	32
Diameter:	80/75/70/65mm	Design:	Asperical

MR-7 is generally used to make high-level lenses, with a refractive index of 1.677. Enjoy better visual quality than ever, even with height numbers. Compared to traditional lenses, the MR-7 is thinner and safer. MR-7 is also a material with better dyeing effect at present. Some colored lenses and myopia sunglasses are the best choice for this material.

Production Introduction

The refractive index of MR-7 and MR-10 materials reaches 1.67, and the production of high-level lenses is lighter and thinner. The thermal deformation temperature of MR-7 is 85 degrees, and that of MR-10 is 100 degrees. Both MR-7 and MR-10 are 1.67 refractive index lens materials. MR-7 is easier to dye than MR-10, so MR-7 is more suitable for myopia sunglasses, or fashion lenses. MR-10 lenses have higher hardness, better high temperature resistance, and higher processability. They are often used in workshops and custom lens processing.

Most of today’s spectacle lenses are based on resin lenses. Generally, in the case of poor heat resistance, the film on the surface of the lens will crack, which is caused by thermal expansion. Compared with the reflective film of the lens, the degree of thermal expansion of the base material is serious, and the degree of thermal expansion of the reflective film and the base material is different, and the film crack will occur.

Based on this consideration, MR-10 avoided this problem from the beginning of material design, and through continuous improvement, became a material with good heat resistance and low thermal expansion coefficient.

First, as the temperature increases, the thermal expansion coefficient tends to increase, but the thermal expansion coefficient of MR-10 is 25% smaller than that of general 1.67 materials. Compared with the general 1.67 material, MR-10 has less thermal expansion, is not prone to cracks, and is relatively less affected by heat.

Second, when the temperature is 95°C, a large number of cracks appear on the conventional 1.67 lens, while the MR-10 is completely unaffected.

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Our pursuit and company intention is usually to Always fulfill our purchaser requirements. We go on to acquire and layout excellent high quality products for both our previous and new consumers and realize a win-win prospect for our customers too as us for Factory made hot-sale Single Prescription Glasses - 1.67 MR-7 FSV High Index HMC optical lenses – Boris , The product will supply to all over the world, such as: Argentina, Israel, Netherlands, We also provide OEM service that caters to your specific needs and requirements. With a strong team of experienced engineers in hose design and development, we value every opportunity to provide best products for our customers.

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The company can think what our think, the urgency of urgency to act in the interests of our position, can be said this is a responsible company, we had a happy cooperation!