Hard Coating Semi Finished CR 39 Lenses , 1.56 NK55 Reading Glasses Lenses Blank

1.56 NK55 Hard Coating Cr39 Semi Finished Lens For Reading Glasses
 
I. Specifications:

 
II. Semi-finished lenses:

1. The definition and production of semi-finished lenses   Semi-finished lens is the raw blank used to produce the most individualized RX lens according to thepatient's prescription. Different prescription powers request for different semi-finished lens types or base curves.   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.

2. Minus and plus semi-finished lenses   Lenses with different dioptric powers can be made from one semi-finished lens. The curvature of the front and back surfaces indicates whether the lens will have a plus or minus power.

III. Index 1.56: 

• Aogang Middle Index 1.56 series lens represents the thinnest plus power lenses, give your frame what it really needs!

• Lenses with a 1.56 index are considered the most cost effective lens on the market. They possess 100% UV protection and are 22% thinner than CR39 lenses.

• 1.56 lenses can cut to fit the frames perfectly, and these lenses with knife edge finishing would suit those irregular frame sizes (small or large) and would make any pair of glasses look thinner than ordinary.

• 1.56 single vision lenses have higher Abbe value, can offer wearers excellent wearing comfort.

IV. The process of hard coating lens:

V. Packing & Shipping:
 

VI. Why choose us:

1. We are equipped with world advanced machines and facilities; cooperating with some international branded monomer company; using European quality and management system. All of these guarantee the stable good lens quality.

2. 20 years’ experience in manufacturing and export of optical lenses, which makes us own more than 300 customers spread over 60 countries.

3. Lens items are quite complete including SV, BIFOCAL, PROGRESSIVE, PHOTOCHROMIC, BLUECUT, SUNLENS, POLARISED LENS, FINISHED & SF etc. You can get full range of optical lens from Aogang.

4. Expert new products research department makes us differ from others and new products can be suggested to our customers in due time.

5. Every year, we will exhibit at some optical exhibitions. You can find suitable time and place to talk with us face to face.