Abstract: A method of dyeing a plastic lens including applying a sublimation dye to a dyeing substrate, holding the dyeing substrate on a holding member, holding a plastic lens on the holding member at a position above the dyeing substrate, evacuating a vacuum vessel which accommodates the holding member, transferring the dyeing substrate from the holding member to a heating device provided in the vacuum vessel, so that the dyeing substrate is held to be heatable by the heating device, by vertically moving at least one of the holding member and the heating device, bringing the plastic lens in close proximity to the dyeing substrate by vertically moving at least one of the holding member and the heating device which holds the dyeing substrate, and dyeing the target surface of the plastic lens with the sublimation dye by sublimating the sublimation dye by heating the dyeing substrate using the heating device.

Abstract: A process which enables a plastic lenses having a refractive index of 1.7 or greater and, in particular, plastic lenses having a refractive index of 1.7 to 1.8 to be dyed uniformly to a great density without unevenness, which is, specifically, a process for producing a dyed plastic lens which comprises conducting following steps (1), (2) and (3) in this order: Step (1): a step comprising coating a substrate at 60° C.

Abstract: 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.

Abstract: A process which enables a plastic lenses having a refractive index of 1.7 or greater and, in particular, plastic lenses having a refractive index of 1.7 to 1.8 to be dyed uniformly to a great density without unevenness, which is, specifically, a process for producing a dyed plastic lens which comprises conducting following steps (1), (2) and (3) in this order: Step (1): a step comprising coating a substrate at 60° C.

Abstract: A method of dyeing a plastic lens includes the steps of applying a sublimation dye to a dyeing substrate, holding the dyeing substrate on a holding member, holding a plastic lens on the holding member at a position above the dyeing substrate, evacuating a vacuum vessel which accommodates the holding member, transferring the dyeing substrate from the holding member to a heating device provided in the vacuum vessel, so that the dyeing substrate is held to be heatable by the heating device, by vertically moving at least one of the holding member and the heating device, bringing the plastic lens in close proximity to the dyeing substrate by vertically moving at least one of the holding member and the heating device which holds the dyeing substrate, and dyeing the target surface of the plastic lens with the sublimation dye by sublimating the sublimation dye by heating the dyeing substrate using the heating device. An apparatus for dyeing a plastic lens is also disclosed.