Heat treatment coating of optical lenses; tinting of lenses; grinding of lenses; contact lens tinting; 3D printing; molding of plastic materials; processing of hydro carbon derivatives; processing of hydrocarbons; processing of plastics; treatment of optical components to alter optical properties; treatment of synthetic polymers against bacteriological infections; treatment of synthetic polymers against fungal attacks; custom manufacture of ophthalmic lenses for eyeglasses; grinding and polis...

ESTERS, MIXTURES OF ESTERS, AND ESTERS OR MIXTURES OF ESTERS COMPOUNDED WITH MODIFYING AGENTS SUCH AS RESINS, FATTY OILS, MINERAL OILS, SULPHONATES, SOAPS, AMIDES OR OTHER MATERIALS, HAVING A GENERAL USE IN THE INDUSTRIAL ARTS; BUT EXCLUDING QUATERNARY AMMONIUM GERMICIDAL COMPOUNDS FOR USE IN SUCH ARTS