Patent ID: 6669338
Filing Date: 2003-12-30
Classification: G02B

Abstract:
The method of using tablets or coated tablets to introduce tint, UV absorbers, decolorant, conditioners and other optical chemistry into dyebaths for coloring and otherwise treating plastic non-contact spectacle lenses and optical filters, said method comprising the following steps of:a. providing a combination of powdered or granular tint, powdered or granular UV absorbers, powdered or granular decolorant along with powdered or granular surfactants all in the form of powders or granules and designed to produce the desired tinting color, UV absorption or other treatment for non-contact spectacle lenses or optical filters; b. compressing the powders or granules in a mold by the pressure needed to produce a strong, solid tablet which can be molded in various geometrical shapes; c. introducing the solid tablet into liquid in a dyebath, thereby obtaining a solution for coloring and otherwise treating plastic non-contact spectacle lenses and optical filters.