Method for tinting a hydrophilic contact lens

Details Method for tinting a hydrophilic contact lens Method for tinting a hydrophilic contact lens

D - Textiles, Paper

06

P

D06P 3/00 (2006.01) B29D 11/00 (2006.01) D06P 3/34 (2006.01) G02C 7/02 (2006.01)

Patent

CA 2102550

METHOD FOR TINTING A HYDROPHILIC CONTACT LENS Abstract A method of tinting an unhydrated contact lens involves the steps of providing an unhydrated contact lens; providing a dyestuff solution; providing a printing block comprising a hydrophilic polymer material containing a dye complexing agent capable of noncovalently bonding the dyestuff; placing the dyestuff solution onto the printing block; contacting the unhydrated contact lens and the printing block for a time sufficient to allow the dyestuff solution to diffuse to the lens; and removing the lens from the printing block. (Fig. 1)

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