MARKING METHOD FOR PLASTIC LENS OF SPECTACLES

Japanese Patent JP3887869

B2

PROBLEM TO BE SOLVED: To eliminate the problem that a mark is stripped through ball grinding work, or the like, by making the surface of a spectacle plastic lens subjected to water/oil repellent treatment using a pad printing ink containing a pigment, a modified epoxy resin, and the like, added with a fluorine based surfactant.
SOLUTION: A progressive focal point plastic lens having an antireflection film subjected to water/oil repellent treatment and a rest contact angle of about 100° with respect to the water is marked with a horizontal line, a fitting point and a neighborhood part by stencil printing. A pad printing ink containing a pigment, a modified epoxy resin and a solvent added with a fluorine based surfactant is employed for marking. According to the method, the mark is prevented from being stripped even it the plastic lens is subjected to ball grinding. Furthermore, machining miss can be prevented because the performance on the surface of the lens is invariant after the mark is erased.

JP2002113936	SHEET-FED TYPE GRAVURE PRINTING PROCESS, GRAVURE SHEET- FED PRESS AND ITS CYLINDER FOR GRAVURE PRINTING
JP3776830	CARD WITH PHOTODIFFRACTION LAYER AND METHOD FOR MANUFACTURE THEREOF
JPH1078682	PRINTED MATTER BY ELECTROSTATICALLY CHARGED LIQUID DEVELOPING METHOD

Katsuyoshi Takeshita
Hiromi Komatsu

JP7757697A

February 28, 2007

March 28, 1997

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Seiko Epson Corporation

B41M1/30; G02C7/02; (IPC1-7): B41M1/30; G02C7/02

JP1102517A

Masahiko Ueyanagi
Osamu Suzawa

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