Posted by Steve | Posted in Mold Making | Posted on 04-04-2010
Tags: art, Casting, materials, mold, plaster mold casting process, rubber
Beginner’s plaster-casting, tips and info please!?
I want to have a go at creating some plaster casts from latex moulds. Some tips please on the type of plaster to use (and where to get it!) and the process itself! Complete novice!
you can buy plaster at most hardware stores or building suppliers. Take about half of the final volume of water. Sprinkle (you can do that fast, but avoid lumps and so on) plaster into water until plaster starts not to sink into water any more. Then mix. Shake/tap container a couple of times to get airbubbles to rise. fill into your mold. Make sure before you even get started that your mold is firm enough and tight enough no plaster will run out the sides.
Let set. Maybe 20-30 mins or longer.
Unless you have a flexible mixing container, clean up immediately. Do not flush any water- plaster mix down the sink, eventually it will clog up all your drains. Let water/plaster mix from cleaning settle in a bucket, then you can pour the water off and discard the plaster into the trash.
RPM-Rubber Plaster Mold Casting Process for Aluminum
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