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Navajo sandpainting, photogravure by Edward S. Curtis, 1907, Library of Congress. In the sandpainting of southwestern Native Americans (the most famous of which are the Navajo [known as the Diné]), the Medicine Man (or Hatałii) paints loosely upon the ground of a hogan, where the ceremony takes place, or on a buckskin or cloth tarpaulin, by letting the coloured sands flow through his fingers ...
Collectors became so enamored of the new art that some were accused of deliberately smashing valuable pottery so it could be repaired with the gold seams of kintsugi. It is also possible that a pottery piece was chosen for deformities it had acquired during production, then deliberately broken and repaired, instead of being trashed.
The name is from the Spanish word placer, meaning "alluvial sand". Placer mining is an important source of gold, and was the main technique used in the early years of many gold rushes, including the California Gold Rush. Types of placer deposits include alluvium, eluvium, beach placers, aeolian placers and paleo-placers. [2]
The sand that is in contact with the casting is called facing sand, and is designed for the casting on hand. This sand will be built up around the pattern to a thickness of 30 to 100 mm (1.2 to 3.9 in). The sand that fills in around the facing sand is called backing sand. This sand is simply silica sand with only a small amount of binder and no ...
The foam supports the sand, allowing shapes that would be impossible if the process had to rely on the sand alone. The metal is poured in, vaporizing the foam with its heat. In dentistry, gold crowns, inlays and onlays are made by the lost-wax technique. Application of Lost Wax technique for the fabrication of cast inlay was first reported by ...
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