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Title:
METHOD FOR DYEING PLASTIC LENS
Document Type and Number:
Japanese Patent JPH03249617
Kind Code:
A
Abstract:
PURPOSE:To allow uniform and stable dyeing with good color tones without unequalness by previously treating the surface of a plastic lens with an org. solvent soln. of a phenolic compd. CONSTITUTION:The surface of the plastic lens is previously treated with the org. solvent soln. of a phenolic compd. at the time of immersing the plastic lens in an aq. disperse type dye soln. to dye the plastic lens. The phenolic resin to be used for the purpose of the treatment is not particularly limited insofar as the compd. does not attack the surface of the plastic lens; more specifically, phenol, o-methoxyphenol, o-cresol, quinazarine, etc., are exemplified. The uniform and stable dyeing with the good color tones without the unequalness is thus executed at a desired dyeing speed without impairing the characteristics intrinsic to the plastic lens.

Inventors:
MINORIKAWA NAOKI
OTAKE ISAO
ARAKAWA TSUTOMU
MARUYAMA SATOSHI
Application Number:
JP4903090A
Publication Date:
November 07, 1991
Filing Date:
February 27, 1990
Export Citation:
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Assignee:
SHOWA DENKO KK
International Classes:
G02C7/00; D06P3/00; G02B7/10; (IPC1-7): D06P3/00; G02B7/10; G02C7/00