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Jon W

Member Since 15 May 2017
Offline Last Active May 18 2017 07:50 PM

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Slip Casting Model (Master) Material

15 May 2017 - 10:14 PM

Newbie here. I'm going to try slip casting and was wondering about the materials used for my master (is that the right term?). I'll be doing small figurines (about 7 to 8 inches tall) and they'll be separated for mold making and pouring. The sections will be head, torso w/out arms, arms, and finally legs w/feet from the waist down. I see videos of plaster molds made with the master formed using modeling clay that is leather hard and was wondering if that is the only option? I've made a couple of models already using a high quality air dry clay that has hardened and then been coated with clear acrylic spray. I was going to make silicone molds and resin pour them but my daughter does ceramics and I love the slip casting process. Are these "hard" masters usable or are they too brittle? Is the acrylic coating an issue concerning the plaster? The coating makes them quite strong actually. Thanks!