{"id":1455,"date":"2010-10-19T20:59:14","date_gmt":"2010-10-20T02:59:14","guid":{"rendered":"http:\/\/alliwalk.com\/blog\/?p=1455"},"modified":"2010-10-19T20:59:14","modified_gmt":"2010-10-20T02:59:14","slug":"casting-with-plaster","status":"publish","type":"post","link":"https:\/\/alliwalk.com\/blog\/2010\/10\/casting-with-plaster\/","title":{"rendered":"Casting with plaster"},"content":{"rendered":"

In Materials class, we covered molding and casting with plaster. I really liked the assignment for this week, which was just to make a cast of my hand. <\/p>\n

The steps are pretty simple, though easy to mess up. Basic run through: Just cover your hand in Vaseline, stick it in some Alginate, wait for Alginate to harden. Alginate is mixed at a 1:1 ratio – one part Alginate, one part cold<\/strong> water. (Hot water makes it harden much faster than you expect, and possibly before you’ve put your hand in the Alginate.) When the Alginates done, slowly remove your hand. You’ll have a negative mold of your hand. Pour into this some molding plaster – 2:1 ratio, plaster to water – and wait for it to harden. The plaster will take under an hour to harden, but it will take a few days to completely dry. When it’s thoroughly dry, you can use it in silicone rubber or polyurethane rubber molds.<\/p>\n

Now photos!