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Why do large clay models need an armature for support?
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Sculpture
Visitors viewing A Subtlety, or the Marvelous Sugar Baby, a sugar-coated polystyrene sculpture by Kara Walker, 2014, part of a temporary installation at the former Domino Sugar Refinery in Brooklyn, New York.
In sculpture, a large clay model requires an armature because it serves as a necessary internal skeleton or framework to provide structural support.12
While small, compact designs can be modeled solidly without assistance, larger models involve a significant weight of clay that would otherwise collapse under its own mass. The armature, typically constructed from rigid materials like wood, iron rods, or pipes, allows the sculptor to build up the main masses of the figure firmly. By providing this essential foundation, the armature ensures the stability of the sculpture while the artist shapes the form and adds finer details.21