Soon after 1873, Hugo installed a chemical lab and a two-pot experimental kiln in Polaun. It was here that new coloured glass and other technological innovations were created and patented. Hugo initiated the production of ruby glass coloured with Dukat Gold, added fine turbid and wound cones used to layer glass, invented Rozalin, came up with new processes to decorating glass with enamel and even designed some of the decorative glass. In 1876, the Polaun glassworks completely switched to coal in its kilns.