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CR-39 is made by polymerization of diethylene glycol bis allyl carbonate (ADC) in presence of a diisopropyl peroxydicarbonate (IPP) initiator
CR3-9 has the highest Abbe value of any lens
Hollywood Aqua | Round Shape
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Halfway Blue UNISEX CR-39 is made by polymerizationHalfway Blue Round Shape. Frame Color: Black Lens Color: Blue 1 Year Warranty Technical Information: Hand PolishedWidth Nose Gap Height Measurements of this pair: 145 23 46mmHinge: Five barrelFront thickness: 6. 0 mm Temples thickness: 4. 0 mm Lenses Technology: CR 39 Lenses. CR 39 is made by polymerization of diethyleneglycol bis allylcarbonate (ADC) in presence of diisopropyl peroxydicarbonate (IPP) initiator."CR 39" is an abbreviation of Columbia