Factory directly Round Polarized Sunglasses - Women Stylish Rectangular Sport Sunglasses 2021-1 – Yinfeng
Factory directly Round Polarized Sunglasses - Women Stylish Rectangular Sport Sunglasses 2021-1 – Yinfeng Detail:
Production Description
Sunglasses can block uncomfortable strong light and protect eyes from ultraviolet rays. All this is due to metal powder filtration devices, which can “select” light when it enters. Colored glasses can selectively absorb part of the wavelength band of sunlight because they use very fine metal powders (iron, copper, nickel, etc.). In fact, when light hits the lens, the light is reduced based on the so-called “destructive interference” process.
In other words, when some wavelengths of light (here refers to ultraviolet A, ultraviolet B, and sometimes infrared) pass through the lens, they will cancel each other on the inside of the lens, that is, in the direction towards the eyes. The overlapping of light waves is not accidental: the combination of the peaks of a wave and the troughs of its adjacent waves leads to mutual cancellation. The phenomenon of destructive interference depends on the refractive index of the lens (that is, the degree of deviation when light passes through different substances from the air) and on the thickness of the lens. Generally speaking, the thickness of the lens changes little, while the refractive index of the lens varies according to the difference of chemical composition. And sunglasses should not be in direct contact with the sun.
FAQ
Q: Can you do customized designs and package?
A: Yes, we offer oem services:
1. you can custom your styles
2. you can custom your mirror lens
3. you can custom your packing box
4. you can custom your logo styles (engraved logo, embosses logo. metal sticker logo, printing logo, laser logo, fixed metal logo)
Q: How about your delivery time?
A: the specific delivery time depends your quantity
Q: How can i get the price?
A: pls sent the inquiry to us, we can quote the price within 12 hours
Q Can I get a test or sample order first before bulk purchase?
Yes, that’s no problem, a test or sample order is also welcomed initially.
Q. Can you refund the sample cost when I place order?
Yes, sample cost will be deducted from deposit of the mass order.
Q: What’s the warranty?
We are very confident to our products. Before sending out, we will check out each single one and pack them well. But to avoid any
subsequent trouble, please check on your glasses upon receiving, and keep us informed if there is any damaged ones. For glasses
with quality issue, we have policy to re-deliver to you for free.
Product detail pictures:
Related Product Guide:
As a way to provide you advantage and enlarge our organization, we even have inspectors in QC Crew and guarantee you our greatest assistance and product or service for Factory directly Round Polarized Sunglasses - Women Stylish Rectangular Sport Sunglasses 2021-1 – Yinfeng , The product will supply to all over the world, such as: Italy, Estonia, Surabaya, We always stick to the tenet of "sincerity, high quality, high efficiency, innovation". With years of efforts, we have established friendly and stable business relationships with worldwide customers. We welcome any of your inquiries and concerns for our products, and we are sure that we will offer just what you want, as we always believe that your satisfaction is our success.
By Laurel from Lebanon - 2018.11.11 19:52
High Quality, High Efficiency, Creative and Integrity, worth having long-term cooperation! Looking forward to the future cooperation!
By Anna from New York - 2018.10.01 14:14
