The Colour division of US-based Ferro Corporation supplies glass manufacturers throughout the world with colour technology to produce short runs of a variety of coloured glass using its Forehearth Colouring System. According to Ferro, advantages the Forehearth Colouring System for glass manufacturers, as well as the glass packaging end-user include: custom colour matching; glass samples for marketing; trial production runs; technical support; prompt service response; just-in-time supplier programme. Basically, the forehearth colouring process consists of adding Ferro's specially formulated colour concentrates to colourless or flint glass after it has left the furnace and entered the forehearth. At this point, a unique feeder/stirrers blending system is sued to mix the colour concentrate uniformly to produce coloured glass.
