China Wholesale Bamboo Sunglasses Suppliers – 22313 Aluminum Titanium Sunglasses Driving Sun Glasses 100% Uv Blocking Stainless Steel Screw Less Sunglasses Stainless Steel Vintage Sunglasses – Centar Optics

Parameters

High quality Brand Design Sun Glasses,Classic high-end sunglasses

Sunglasses are a kind of vision care products to prevent the damage to human eyes caused by strong sunlight. With the improvement of people’s material and cultural level, sunglasses can be used as special accessories for beauty or personal style. Our eyeball (lens) is very easy to absorb ultraviolet rays, and the damage of ultraviolet rays to the eyes is invisible. In order to protect the eyes, we must always wear sunglasses. Ophthalmologists recommend that you must always wear sunglasses to protect your eyes; this is because our eyeball (lens) is very easy to absorb ultraviolet rays, and the damage of ultraviolet rays has two prominent characteristics: 1. The damage of ultraviolet rays will accumulate. Since ultraviolet light is invisible light, it is difficult for people to perceive it intuitively. 2. The damage of ultraviolet rays to the eyes is irreversible, that is, irreparable. Such as: cataract surgery can only be replaced by intraocular lenses. Long-term damage to the eye can easily lead to damage to the cornea and retina, clouding of the lens until cataract occurs, resulting in permanent visual damage.

The mystery of color-changing glasses is in the glass. This special glass is called “photochromic” glass. In the manufacturing process, it is pre-doped with light-sensitive substances, such as silver chloride, silver bromide (collectively referred to as silver halide), etc., as well as a small amount of copper oxide catalyst. The spectacle lenses change from no color to light gray and dark brown, and then from black glasses to sound-tone glasses, all of which are magic of silver halide.” In the glass of color-changing glasses, there is a change very similar to the exposure image of photosensitive film. Process. Silver halide is decomposed by light and becomes many black silver particles, which are evenly distributed in the glass, so the glass lens appears dim and blocks the passage of light, which is black glasses. However, it is different from the situation on photosensitive film. , the silver atoms and halogen atoms generated by the decomposition of silver halide are still closely together. When returning to a slightly darker place, under the promotion of copper oxide catalyst, silver and halogen recombine to form silver halide, glass lens became transparent again.

Many sunglass manufacturers use a process called constant density to tint the lenses. This is the oldest manufacturing process for sunglasses, and the entire glass or polycarbonate blend material has the same color. Therefore, in the process of manufacturing the lens, the color is inside the lens. Coating a layer of light-absorbing molecules on the surface of pure polycarbonate is also a dyeing method. The most common way to tint polycarbonate lenses is to soak them in a special liquid that contains a tinting substance that will slowly absorb into the plastic. For a darker color, simply extend the time the lens is immersed in the liquid.

FAQ

1. Can I get a samples?

Yes, we could send the samples to you.But, we need take charge for first time,the sample fee will be return after you place order. Or you can provide your FEDEX or DHL,UPS account.

2. How about the quality?

Have the acquired the CE.100% QC in produce process .Our products manager have 18 years experience in eyewear manufacturing.

3. Could I use my own LOGO or design on goods? Are they free?

Yes,customized logo and design on mass production are available.

4. What is the Delivery Time?

The stock frames are within one week after payment received.
For OEM order, the delivery time is around 20– 35 days which depends on the material and Design.

5. Can I trust you?

Absolutely YES. Wenzhou Centar Optics Co., LTD. is a specialized manufacturer and exporter of eyewear. We have been in this field for more than 18 years.Has been the customer’s praise and affirmation.

6. What is the payment terms?

T/T,Western Union.