Mold Making and casting

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Permalink Reply by Pig Man on March 1, 2008 at 8:13am

My first question is about Wet Clay Dams

I have found that when using wet clay for damms for my Ultracal 30 molds my plaster around the clay becomes chalky. is there a way to seal the wet clay so it dosn't affect the plaste?.

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Permalink Reply by Larry Bones on March 1, 2008 at 10:07am

Pick up a can of Crystal Clear spray and a can of dulling spray from an Art store like michaels. First seal the clay wall with 2 light coats of crystal clear. Once that is dry, put one light coat of dulling spray over that. The Crytsal clear creates a barrier but it creates surface tension that will make the ultracal bead up. The dulling spray breaks the tension so the stone will brush on smoothly.

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Permalink Reply by Pig Man on March 8, 2008 at 8:45pm

I belive I may have found another cause for my molds getting chalky. I have been hitting the sculpture and wet clay dams with a silicone spray, I belive the oil in the spray may be affecting my ultracal. My last mold I made I watered down some car wax with 90% rubbing alcohol and had pretty good results.

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Permalink Reply by Pig Man on March 10, 2008 at 8:21pm

I use Kleen clay I get from Columbus clay I belive it is sulfer free but I'm planning to do a test with a small batch of silicone. I've been thinking about doing brush on silicone molds with my clay sculptures and making wax masters, so I don't have to cry when a big piece of mold chips off. I'll just make a new mold as many times as I need. Something I plan to expeirement with I want to find out if the wax will soak into the Ultracal when I bake it out of the mold and if the latex will still gel to the surface well. I may start just doing my sculptures with wax to begin with. I've been planning to use sheet wax for dams to make smooth parting lines as with the moist clay I just cant get my flanges as flat and smooth as I would like them to be.

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Permalink Reply by Pig Man on March 29, 2008 at 1:29pm

Thought I would post some pictures of my last creation I molded actually it is from my very first 2 piece mold. He gave me the Idea to start this forum on mold making and casting I made him about 6 weeks ago and just finnally uploaded the pictures to my computer..
He is a hand puppet that I'm sure is destined to be a star this year at the Haunted Hydro as the world champion french fry eater and will kill for french frys.

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Permalink Reply by Pig Man on March 29, 2008 at 1:30pm

Sorrry about the big pictues thought they were going to be thumbnails

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Permalink Reply by BoxHead on March 30, 2008 at 7:00pm

I can't wait to see this Bad Rat in action this coming Hydro season! The Q-line had better watch there Fries.
I must Have one!!!!
Will you sell me one and how much?

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