Philip Optech Co., Ltd. is a manufacturer of photochromic lenses and supplier of photochromic monomers to Korea, China and world wide market. Since 1998, over 10 years, we have been not only supplying the photochromic monomers but also offering our customers technical service for casting photochromic lenses. So, our superior service of high technology for 10 years have been on the top to our customers. In the field of photochromic lens business including monomer supplying, we are always remained to be much superior to other competitors. We can offer you two types of business as follows. 1. MONOMER BUSINESS for photochromic lense RI 1.56 No residual & Standard RI 1.57 No residual & Standard RI 1.61 ( Coming soon ! Developing ) 2. PHOTOCHROMIC LENS business RI 1.56 & 1.57 No residulal color RI 1.56 & 1.57 Standard color * Technical Data ; Index : 1.56 & 1.57 Material : Solaris Abbe Value : 40<= Darkness : 85% over tinted Specific Gravity : 1.19 Diameter : (-, -)70mm / (+, -) 65mm * Features Color : Grey, Tinted over 85%, Beautiful Grey like Sunglass Brown, Tinted over 75% Beautiful Brown Speed (Darkening/Fading) : 1 minutes & few seconds Longivity : Over 1 year Light weight HMC Framless Application is good for cutting Philip Optech Co., Ltd. is a happy to introduce our Brand New, " No residual " photochromic lenses. This lens offers you almost same clearness as clear as regular lenses does indoors like CR39. They are as clear as regular lenses indoors and more over 85% tinted outdoors like sunglass. It fades away to clear lenses indoors having no residual color. It is much more superior to the standard photochromic lenses ! As a conclusion, you can have a easy choice between our standard and Brand new photochromic lenses. Philip Optech Co., Ltd. TEL: 82-31-906-2376 FAX:82-31-906-2417</p>