| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing a spectacles frame using an ultraelastic material which is supple and gives excellent wearing feeling at the time of wearing spectacles and has a small residual bend. SOLUTION: When the spectacles frame is manufactured by subjecting the ultraelastic material of a Ni-Ti-Co ternally alloy system to cold working, to molding into a prescribed spectacles frame shape and then to a shape memorizable heat treatment in a state holding the molded shape, the shape memorizable heat treatment is executed at a temperature of 400 deg.C to 440 deg.C for >=15 minutes. When ultraelastic material of a Ni-Ti binary alloy system is used, the shape memorizable heat treatment is executed at a temperature of 510 deg.C to 540 deg.C for >=15 minutes.
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