Tinted contact lens and method of tinting with reactive dye and

Details Tinted contact lens and method of tinting with reactive dye and Tinted contact lens and method of tinting with reactive dye and

1989-03-14

1990-09-04

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Nontextile, dyeing process or product, including inorganic...

Contact lens

8543, 8549, 8606, 8509, D06P 500

Patent

active

049541323

ABSTRACT:
An improvement in a process for preparing a contact lens tinted over at least a portion of its surface, having the steps of forming a tinting solution having a reactive dyestuff and applying the tinting solution to a polymeric hydrogel contact lens material, wherein the improvement comprises adding an effective amount of an ammonium quaternary salt to the tinting solution before the applying step.

REFERENCES:
patent: 3476499 (1969-11-01), Wichterle
patent: 4468229 (1984-08-01), Su
patent: 4553975 (1985-11-01), Su
patent: 4559059 (1985-12-01), Su
patent: 4668240 (1987-05-01), Loshaek

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