100 90 80 70 60 50 40 30 20 10 Transmission % 500 360 UV 400 UV 380 Wellenlänge (nm) Prescription safety spectacles Lens material Polycarbonate • mechanical strength 'F' (45 m/sec) • organic material with very high breaking strength • only partially chemical-resistant • PC+ – polycarbonate with increased centre thickness and mechanical strength 'B' (120 m/sec), especially for the uvex RX goggle • PC and PC+: Identification code: 2C-1.2 as per EN 170 Trivex™ • mechanical strength 'F' (45 m/sec) • best all-round lens material • excellent resistance to cleaning agents, oils and cosmetics and good scratch resistance • lightweight, suitable for even higher prescription values CR39, modified (plastic) • mechanical strength 'S' (ball drop test) • lightweight organic material suitable for chemicals and painting • good scratch restistance due to hard coating (optional) HI (high index) Organic lenses with high refractive index – 1.6 or 1.67 • mechanical strength 'S' (ball drop test) • organic material suitable for chemicals and painting • the lens is thinner and more aesthetically pleasing HI 1.6 recommended for a prescription > +/-4.0 dpt. HI 1.67 recommended for a prescription > +/-6.0 dpt. Hard glass, modified (crown glass, silicate, mineral glass, glass) • mechanical strength 'S' (ball drop test) • highly scratch-resistant surface suitable for working with chemicals and paints • heavy, not recommended for prescription values greater than +/-4.0 dpt. • spark penetration when welding or grinding UV blue protect A special absorber has been added to the lens material that completely filters out UV rays and reduces the blue light content. • the lenses absorb UV radiation up to 400 nm at 100%, filter short-wave blue light until 410 nm almost completely and reduce the range from 410 nm to 420 nm around 86%. • uvex UV blue protect lenses enhance contrast and effectively prevent signs of fatigue and age-related macular degeneration (AMD) • UV blue protect is optionally available for polycarbonate (PC) lenses and HI 1.67 • the mechanical strength of the lenses is guaranteed — clear lenses with UV blue protect are marked 2C-1.2 according to EN 170 uvex UV blue protect Wavelength (nm) Transmission % 406
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