section_path: Materials and techniques
section_name: Materials and techniques
paragraph_text: Materials and techniques
  
  The materials used in sculpture are diverse, changing throughout history. The classic materials, with outstanding durability, are metal, especially bronze, stone and pottery, with wood, bone and antler less durable but cheaper options. Precious materials such as gold, silver, jade, and ivory are often used for small luxury works, and sometimes in larger ones, as in chryselephantine statues. More common and less expensive materials were used for sculpture for wider consumption, including hardwoods (such as oak, box/boxwood, and lime/linden); terracotta and other ceramics, wax (a very common material for models for casting, and receiving the impressions of cylinder seals and engraved gems), and cast metals such as pewter and zinc (spelter). But a vast number of other materials have been used as part of sculptures, in ethnographic and ancient works as much as modern ones.
  
  Sculptures are often painted, but commonly lose their paint to time, or restorers. Many different painting techniques have been used in making sculpture, including tempera, oil painting, gilding, house paint, aerosol, enamel and sandblasting.
  
  Many sculptors seek new ways and materials to make art. One of Pablo Picasso 's most famous sculptures included bicycle parts. Alexander Calder and other modernists made spectacular use of painted steel. Since the 1960s, acrylics and other plastics have been used as well. Andy Goldsworthy makes his unusually ephemeral sculptures from almost entirely natural materials in natural settings. Some sculpture, such as ice sculpture, sand sculpture, and gas sculpture, is deliberately short-lived. Recent sculptors have used stained glass, tools, machine parts, hardware and consumer packaging to fashion their works. Sculptors sometimes use found objects, and Chinese scholar's rocks have been appreciated for many centuries.