Patent ID: 7278906

Claim:
An edging method, comprising the steps of: attaching an adhesive tape on an antifouling layer of a lens on which the antifouling layer is provided, wherein the antifouling layer is formed by using, as a main component, a fluorine-containing silane compound; and edging the lens by an edge-machining apparatus while the lens is held by a plurality of chucks such that the adhesive tape is interposed between the lens and at least one of the plurality of chucks in the edge-machining apparatus, wherein the lens is maintained by the adhesive tape which comprises an adhesive face for being in contact with the lens and having a measurement value of an adhesive strength of the adhesive face being 4 gf (0.0392 N) or more when a polyethylene terephthalate plate which has been subjected to a surface treatment with a fluorine-modified silicone parting agent is used as a test plate in an adhesive strength test method based on a 180°-peeling method as defined in JIS Z 0237 “adhesive tape/adhesive sheet test method”, and the elastic modulus of traction (Em) of the adhesive tape is in the range of from 1 kgf/mm 2 to 450 kgf/mm 2 .