Behind every lens is a blank, and behind every blank a monomer or resin: CR-39 (ADC) from PPG, MR-series high-index monomers from Mitsui, polycarbonate resin, and Trivex. Blank casting is concentrated in China, Thailand, Korea, Japan and Mexico.
Varieties (worldwide)
CR-39 semi-finished blanks1.56 semi-finished blanksMR-8 (1.60) semi-finished blanksMR-7 (1.67) semi-finished blanksPolycarbonate semi-finished blanksFinished stock lens blanksADC (CR-39) monomerHigh-index monomers