![\"\"](\"http:\/\/randallwolff.com\/wordpress\/wp-content\/uploads\/2014\/10\/d5fired-e1414994789538.jpg\")
<\/a><\/p>\nIn order to “convert” it to enable making them in fired pressed clay, I would have to make a positive cast in rubber and then make a 5 piece plaster mold of that positive rubber cast. The idea of the rubber positive is the rubber is soft and “gives” so that pulling a hard plaster shell mold off it, undercuts slide right out easily.<\/p>\n
Once I have the positive rubber I can make molds from that as needed, making one to start with. When the plaster mold is dry then the clay can be hand-pressed into it, allowed to stiffen slightly, removed, dried completely and then fired in the kiln.<\/p>\n
One thing with the “converting” is that\u00a0 in the processes there is about a 5% shrinkage of the clay from wet to dry and another 5% shrinkgage during firing for a total of about 10% or 1″ loss per 10″ which on this panel will result in it being about 2″ less wide and maybe 1-1\/4″ less tall.<\/p>\n
Actually, I decided to go ahead and order the $200 worth of mold rubber I need to make the replacement mold for this since the original mold rubber by Quantum Silicones that I used in 2007 to make the first mold turned out to be total\u00a0 garbage. Hopefully this weekend if the rubber arrives before Friday I will have the master cast all set up and ready to mold Saturday.<\/p>\n I should have enough left over from the two gallons added to the left-over rubber I have on hand to make the positive mold too- on Sunday if all goes well.<\/p>\n At least with this I can get the process started, I don’t have any molding plaster on-hand to make the press-mold with though, and the regular cast stone is not suitable for this as it hardens up extremely hard and is not absorbant as the molding plaster is.<\/p>\n I might just get a bag sent to me\u00a0 UPS as I don’t want to order a pallet load of material right now.<\/p>\n <\/p>\n <\/p>\n <\/p>\n","protected":false},"excerpt":{"rendered":" I now have my kiln back in my home studio after removing it from the gallery basement which seemed like the ideal place for it at the time I bought it. So it’s set up now at home where it’s much more convienient to monitor. I fired a couple of older raw clay original models with complete success, including the Astor Place subway beaver model which was just 1\/4″ less tall than the inside of the kiln with the lid closed. I’m considering “converting” the Art Deco D5 model into a terracotta line, here’s the original clay model that I fired in the kiln a year ago after making the rubber mold for casting it in interior cast-stone and concrete: In order to “convert” it to enable making them in fired pressed clay, I would have to make a positive cast in rubber and then make a 5 piece plaster mold of that positive rubber cast. The idea of the rubber positive is the rubber is soft and “gives” so that pulling a hard plaster shell mold off it, undercuts slide right out easily. Once I have the positive rubber I can make molds from that as needed, making one to start with. When the plaster mold is dry then the clay can be hand-pressed into it, allowed to stiffen slightly, removed, dried completely and then fired in the kiln. One thing with the “converting” is that\u00a0 in the processes there is about a 5% shrinkage of the clay from wet to dry and another 5% shrinkgage during firing for a total of about 10% or 1″ loss per 10″ which on this panel will result in it being about 2″ less wide and maybe 1-1\/4″ less tall. I think this fall\/winter I’m going to do this. Actually, I decided to go ahead and order the $200 worth of mold rubber I need to make the replacement mold for this since the original mold rubber by Quantum Silicones that I used in 2007 to make the first mold turned out to be total\u00a0 garbage. Hopefully this weekend if the rubber arrives before Friday I will have the master cast all set up and ready to mold Saturday. I should have enough left over from the two gallons added to the left-over rubber I have on hand to make the positive mold too- on Sunday if all goes well. At least with this I can get the process started, I don’t have any molding plaster on-hand to make the press-mold with though, and the regular cast stone is not suitable for this as it hardens up extremely hard and is not absorbant as the molding plaster is. I might just get a bag sent to me\u00a0 UPS as I don’t want to order a pallet load of material right now. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-2488","post","type-post","status-publish","format-standard","hentry","category-sculptures"],"_links":{"self":[{"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/posts\/2488","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/comments?post=2488"}],"version-history":[{"count":0,"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/posts\/2488\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/media?parent=2488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/categories?post=2488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.randallwolff.com\/wordpress\/wp-json\/wp\/v2\/tags?post=2488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}I think this fall\/winter I’m going to do this.<\/del><\/p>\n