Negotiable
The date of payment from buyers deliver within days
Hebei
Long-term effective
2018-11-25 18:15
506
Company Profile
By certification [File Integrity]
Contact：qddwhg(Mr.)
Email：
Telephone：
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Area：Hebei
Address：Hebei
Website：http://www.tcmchem.com/ http://qddwhg.sz-adapter.com/
Introduction:
Photochromic lenses are optical lenses that darken on exposure to specific types of light of sufficient intensity, most commonly ultraviolet (UV) radiation. In the absence of activating light the lenses return to their clear state.
Photochromic lenses may be made of glass, polycarbonate, or another plastic. They are principally used in eyeglassesthat are dark in bright sunlight, but clear in low ambient light conditions. They darken significantly within about a minute of exposure to bright light, and take somewhat longer to clear. A range of clear and dark transmittances are available.
Storage:
Keep sealed in a dark, cool place, away from direct sunlight.
Color changing principal:
⇒
Image for application:
http://www.tcmchem.com/
