{"id":7996,"count":1,"description":"A crucible is a container that can withstand very high temperatures and is used for metal, glass, and pigment production as well as a number of modern laboratory processes. While crucibles historically were usually made from clay, they can be made from any material that withstands temperatures high enough to melt or otherwise alter its contents.\nThe form of the crucibles has varied through time, with designs reflecting the process for which they are used, as well as regional variation. The earliest crucible forms derive from the sixth\/fifth millennium B.C. in Eastern Europe and Iran.\nCrucibles used for copper smelting were generally wide shallow vessels made from clay that lacks refractory properties which is similar to the types of clay used in other ceramics of the time. During the Chalcolithic period, crucibles were heated from the top by using blow pipes. Ceramic crucibles from this time had slight modifications to their designs such as handles, knobs or pouring spouts (Bayley &...","link":"https:\/\/www.skateboarding-lessons.com\/go\/tag\/crucible\/","name":"Crucible","slug":"crucible","taxonomy":"post_tag","meta":[],"_links":{"self":[{"href":"https:\/\/www.skateboarding-lessons.com\/go\/wp-json\/wp\/v2\/tags\/7996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skateboarding-lessons.com\/go\/wp-json\/wp\/v2\/tags"}],"about":[{"href":"https:\/\/www.skateboarding-lessons.com\/go\/wp-json\/wp\/v2\/taxonomies\/post_tag"}],"wp:post_type":[{"href":"https:\/\/www.skateboarding-lessons.com\/go\/wp-json\/wp\/v2\/posts?tags=7996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}