3W5W Ultraviolet laser high-precision engraving glasses  The Czech purchasing manager, Pavel, has always been in the cosmetics business. The factory will use the C02 laser marking machine to print some QR codes, logos, etc., but last year he invested in a factory for making glasses. Previously the CO2 laser marking machine used in cosmetics factories could not use laser etching on glasses, because the spectacle frame is made of plastic material and is easily deformed by heat, and the lens is made of glass, which is easy to break, so UV laser is required for marking.