Armature for Polymer Clay
Armature is an internal structural support for a sculpture. The armature could be made out of wire, foil, paper, or other materials. It is widely used with polymer clay to add strength to sculpted pieces and to reduce the amount of clay needed for sculpting (big polymer clay beads, for example, may be formed around balls made out of aluminum foil). Armature may be permanent (left in the clay sculpture) or temporary (removed after baking).
See also: Light Bulb Vessel and Hollow Beads.