September 24th, 2011 WorkshopNovember 16, 2011Coloured glass frits are used to add colour to clear molten glassBy Minna Koistinen Previous Student making glass paperweight Next Minna and Andrea assist a student creating a glass ornament Related Posts Waiting for glass to cool down November 16, 2011 Student applying color to molten glass from the marver November 16, 2011 Shaping glass with pincetti November 16, 2011 Student cutting the jack line November 16, 2011