DYEING METHOD FOR PLASTIC LENS

• Main Author: MINOWA TOSHIAKI
• Format: Patent
• Language: English
• Published: 27.05.1988
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; CONTACT LENSES; DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM; DYEING OR PRINTING TEXTILES; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL PROCESSES OF COMPOUNDING; LAUNDERING; METALLURGY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PHYSICS; SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF TEXTILES OR THE LIKE; WORKING-UP

PURPOSE:To make the boundary line of a dyed part and an undyed part distinct by applying a film consisting of a coating agent which cannot be dyed, to the whole surface of a plastic lens, cutting and eliminating a part of the film, and dyeing its excised part. CONSTITUTION:A film 2 consisting of a coating agent which cannot be dyed, for instance, a polysiloxane series film 2 is applied to the whole surface of a plastic lens 1 by a spraying method, etc. Subsequently, a part of the film 2 is eliminated to a desired shape 3 by using a diamond grind stone, etc. Next, the lens 1 which has been cut and eliminated is immersed in a prescribed dyeing liquid for a prescribed time and dyeing is executed. After the dyeing, the lens 1 is washed enough by flowing water and dried, by which the object dyed lens 1 can be obtained.