{"id":1372,"date":"2020-08-26T10:37:49","date_gmt":"2020-08-26T17:37:49","guid":{"rendered":"http:\/\/labs.wsu.edu\/field\/?p=1372"},"modified":"2020-09-02T13:57:38","modified_gmt":"2020-09-02T20:57:38","slug":"compo","status":"publish","type":"post","link":"https:\/\/labs.wsu.edu\/field\/2020\/08\/26\/compo\/","title":{"rendered":"Compo"},"content":{"rendered":"<p><img decoding=\"async\" loading=\"lazy\" class=\"alignleft wp-image-825 size-medium\" src=\"https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/1108\/2016\/03\/compo-396x545.jpg\" alt=\"\" width=\"396\" height=\"545\" srcset=\"https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/1108\/2016\/03\/compo-396x545.jpg 396w, https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/1108\/2016\/03\/compo-144x198.jpg 144w, https:\/\/wpcdn.web.wsu.edu\/wp-labs\/uploads\/sites\/1108\/2016\/03\/compo.jpg 600w\" sizes=\"(max-width: 396px) 100vw, 396px\" \/><\/p>\n<p>Used in architectural restoration, compo (short for composition) is a\u00a0mix of\u00a0calcium carbonate, gelatin, pitch, and other ingredients.<\/p>\n<p>As a molding material compo holds unique qualities suitable for manipulation. It can be used in making press molds, but unlike clay it needs no firing to achieve hardness and durability. Its &#8220;plastic&#8221; phase is reportedly generous, allowing for further working of the material as it approaches a leather-hard state. It then sets like plaster (but is reversible with steam heat).<\/p>\n<p>One drawback is that calcium carbonate is a dust that likes to travel and settle on studio surfaces. Typically a foundry (or university art department) has a room dedicated to plaster. But this is not feasible for everyone, and I am interested primarily in ways the home user and maker can design and create original objects. What if plaster and other forms of calcium carbonate were eliminated from the equation?<\/p>\n<p>How could one achieve this and still produce a material\u00a0with the same properties of compo? Would it require a complete reconstitution, or could something less environmentally harmful simply be used in place of the calcium carbonate?<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Used in architectural restoration, compo (short for composition) is a\u00a0mix of\u00a0calcium carbonate, gelatin, pitch, and other ingredients. As a molding material compo holds unique qualities suitable for manipulation. It can be used in making press molds, but unlike clay it needs no firing to achieve hardness and durability. Its &#8220;plastic&#8221; phase is reportedly generous, allowing [&hellip;]<\/p>\n","protected":false},"author":1999,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[409,410,425,412],"wsuwp_university_location":[],"wsuwp_university_org":[],"_links":{"self":[{"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/posts\/1372"}],"collection":[{"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/users\/1999"}],"replies":[{"embeddable":true,"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/comments?post=1372"}],"version-history":[{"count":2,"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/posts\/1372\/revisions"}],"predecessor-version":[{"id":1380,"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/posts\/1372\/revisions\/1380"}],"wp:attachment":[{"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/media?parent=1372"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/categories?post=1372"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/tags?post=1372"},{"taxonomy":"wsuwp_university_location","embeddable":true,"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/wsuwp_university_location?post=1372"},{"taxonomy":"wsuwp_university_org","embeddable":true,"href":"https:\/\/labs.wsu.edu\/field\/wp-json\/wp\/v2\/wsuwp_university_org?post=1372"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}