Impacts of casting condition on tinting plastic lens

Abstract

This study was study about the impact of plastic lens production by casting method on tinting plastic lens. Factors in this study are initiator concentration, temperature condition and casting processing time. By the study of rate of tinting use HOYA SUNGLASS BLACK, the result found that rate of tinting is inverse proportional to initiator concentration, temperature condition and casting processing time. Although the study of surface quality control found that in production must control these condition in suitable for keep the quality of product. From tinting follow by HOYA standard method found that for Type I, initiator concentration should be in range 3.5% to 3.6% and should be control starting temperature at 40 to 46 ํC, final step temperature should control at 80 to 85 ํC by set final step process time at least 30 min to 90 min. For Type II, initiator concentration should be in range of 2.7% to 2.9%. For production pattern found that conditionC1 to C4 polymerization pattern can use in production by set final step processing time at least 30 min to 180 min.