Learn about the 'Know-how' technology for surface colouring of eyeglass polymeric lenses, which allows for double-sided multicolored solid and gradient colouring, as well as decoration with images and logos. This technology also permits colouring lenses with account of the distance between the client’s pupils, making it possible to create glasses in a single copy for VIP clients and for different groups of people. Gain a competitive edge with this technology.