11. Graphite Pencil Leads, Clarinets, Special Effects
Aired: 12/11/2009
Graphite and clay are blended, extruded into slender rods, fired and treated to produce smooth, durable pencil leads. Seasoned wood is drilled, turned and fitted with a complex key mechanism to make clarinets, while special-effects artists use sculpting, mould-making, flexible materials and mechanical devices to create convincing physical illusions.