| 摘要 |
Provided is a process for producing a dyed plastic lens in accordance with which in accordance with which deformation and change in the color of the plastic lens can be suppressed and a plastic lens having a refractive index of 1.7 or greater and, in particular, a refractive index of 1.7 to 1.8, can be preferably dyed uniformly to a great density without unevenness. Specifically, the process for producing a dyed plastic lens comprises: Step (1) of coating a substrate comprising glass with a sublimation dye; Step (2) of, after placing a plastic lens in a manner such that a face for dyeing of the plastic lens and a face of the substrate coated with the sublimation dye face each other, sublimating the sublimation dye coating the substrate obtained in Step (1) by heating the substrate under a degree of vacuum of 1×104 Pa or smaller to attach the sublimated dye to the face for dyeing of the lens without permeation into the lens; and Step (3) of allowing the sublimation dye attached to the plastic lens to permeate into the lens by treatment of heating the plastic lens having the attached sublimation dye obtained in Step (2). The plastic lens becomes likely to be dyed uniformly without unevenness to a great density by using a plastic lens whose face for dyeing is subjected to treatment with plasma.
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