BIOCOMPATIBLE INKS AND CONTACT LENSES COLOURED WITH SAID INKS

摘要

An aqueous ink comprising containing a colorant and a radiation-curable oligomer or polymer containing H-active groups bonded to the oligomer or polymer backbone, some or all of whose hydrogen atoms have been substituted by radicals of a N-hydroxyalkyl (meth)acrylamide. Methods for printing the inventive inks upon medical devices, such as contact lenses, are also disclosed.