The actual material being printed on is usually paper which is out of wood, how ever the printer may be made out of metal, and I am confused on which one you are asking about.
Glass crafts are made by heating sand silica until it melts into a liquid state. The melted glass can then either be shaped by blowing the liquid glass or by pouring the melted glass into a mold. The shape and size of the finished piece depend on the tools and method used by the artist.
