Turn Grey / Brown Photochromic Lenses , HMC EMI Semi Finished 1.60 Index Lenses

Turn grey/Brown 1.60 Photochromic HMC EMI Semi Finished Lens Blanks Transition Optical Lenses

 I. Technical Data:

II. Semi finished: 

The starting point for freeform production is a semi-finished lens, also known as a puck due to its resemblance to an ice hockey puck. These are produced in a casting process that is also used to manufacture stock lenses. The semi-finished lenses are produced in a casting process. Here, liquid monomers are first poured into moulds. Various substances are added to the monomers, e.g. initiators and UV absorbers. The initiator triggers a chemical reaction that leads to hardening or "curing" of the lens, while the UV absorber increases the UV absorption of the lenses and prevents yellowing.

III. Photochromic lens:

1) What are the photochromic lens?   Photochromic lenses are made of many lens materials including plastic, glass or polycarbonate. They are typically used as sunglasses that conveniently switch from a clear lens indoors, to a sunglasses depth tint when outdoors, and vice versa. They typically take around 30 seconds to fully darken and approx 2 - 5 minutes to return to a clear state.

2) The advantages of the photochromic lens?

① Reduced costs – buying a single pair of dual purpose photochromic glasses that can provide vision for both indoors when clear and providing sunglasses protection outside is more cost effective than buying two separate pairs.

② UV protection - Photochromic lenses provide full protection against the harmful UV rays of the sun and direct exposure to sunlight can cause serious eye problems and in some cases blindness.

③ Convenience - You only need to own 1 pair of glasses for both indoors and outdoors in the sun as opposed to needing to switch between 2 pairs of regular glasses to sunglasses. You only need to remember to take one dual purpose pair of glasses with you as no doubt at some point we have all forgotten to take our sunglasses out with us only to be caught out by the glare of the sun or even left them behind never to be seen again.

④ Eye Health – Reducing your exposure to the suns harmful UV rays can lower the risk of cataracts or other eye/age related problems

IV. Coating:

Hard Coated(HC): Making the uncoated lenses are easily subjicted andexposed to scratches   Hard Multi Coated(HMC/AR): Protecting the lens effectively from reflection, enhance functional and charity of your vision   Super hydrophobic Coating: Making the lenswaterproof, antistatic, anti slip and oil resistance

V. The process of AR coating:

VI. Packing:

1. Envelope:

a) standard white envelope

b) color envelope with customer design (Weight: 157g, Size: 9*9*9cm)

2. Outer Box

a) standard export paper carton (Size: 38*48*35cm, 0.064CBMS)

b) Include about 500 pairs of finished lens (Weight: about 21kg) or include about 100 pairs of 100 semi finished lens (Weight: about 15kg)

VII. Shipping:

1. Samples:

a) Delivery time: 3-7 days (by Fedex, DHL, UPS, TNT etc.)

b) Sample is free, but accroding to our company rule, the shipping cost need to be assumed by customers.

2. Batch Goods:

a) Delivery time: 10-30 days (depend on your quantity, by air, sea or express)

b) Carrier: We can choose for you or offer us your cooperative company