Harry Potter Posted June 12, 2012 Report Share Posted June 12, 2012 I use cooking spray as a release agent on some molds. On pieces that dont work out, is it ok to put this clay "with canola oil on it" in the trimming bucket to reuse later. Will the oil affect the clay? Link to comment Share on other sites More sharing options...
Matt Oz Posted June 12, 2012 Report Share Posted June 12, 2012 I did it a few times and didn’t notice any difference. If it sits around wet for a while in the reclaim bucket, it could make your clay stinky when the oil goes bad, a lot of it might make your clay less plastic, but that’s it. Link to comment Share on other sites More sharing options...
justanassembler Posted June 12, 2012 Report Share Posted June 12, 2012 I use cooking spray as a release agent on some molds. On pieces that dont work out, is it ok to put this clay "with canola oil on it" in the trimming bucket to reuse later. Will the oil affect the clay? it probably wont affect the clay, but it really defeats the purpose of a plaster mold (if that is what you're using). The oil will seal the pores of the plaster, thus rendering it unable to absorb moisture and release clay on its own. The entire purpose of a plaster (or bisque, or wood for that matter) mold is that those materials absorb moisture from the surface of the clay allowing it to shrink away from the mold surface and release on its own. Mold release when press molding or slip casting clay is not necessary. Link to comment Share on other sites More sharing options...
Lucille Oka Posted June 13, 2012 Report Share Posted June 13, 2012 I use cooking spray as a release agent on some molds. On pieces that dont work out, is it ok to put this clay "with canola oil on it" in the trimming bucket to reuse later. Will the oil affect the clay? What kind of molds are you using? Link to comment Share on other sites More sharing options...
Harry Potter Posted June 13, 2012 Author Report Share Posted June 13, 2012 I use cooking spray as a release agent on some molds. On pieces that dont work out, is it ok to put this clay "with canola oil on it" in the trimming bucket to reuse later. Will the oil affect the clay? What kind of molds are you using? Link to comment Share on other sites More sharing options...
Harry Potter Posted June 13, 2012 Author Report Share Posted June 13, 2012 Sorry I didn't specify my mold type. I use the oil spray only on glass slump molds. Mostly items I find at the thrift stores. Also on some hard plastic molds. I also use corn starch but the cooking spray seems to work better on glass. Thanks for your replys. Link to comment Share on other sites More sharing options...
Harry Potter Posted June 13, 2012 Author Report Share Posted June 13, 2012 I use cooking spray as a release agent on some molds. On pieces that dont work out, is it ok to put this clay "with canola oil on it" in the trimming bucket to reuse later. Will the oil affect the clay? What kind of molds are you using? Link to comment Share on other sites More sharing options...
Harry Potter Posted June 13, 2012 Author Report Share Posted June 13, 2012 Lucille, verius verba numquam dictum. (Truer words were never spoken) Link to comment Share on other sites More sharing options...
Lucille Oka Posted June 15, 2012 Report Share Posted June 15, 2012 The oil left on your clay may cause an unwanted resist surface for underglazes and glazes. Psalm 100 Link to comment Share on other sites More sharing options...
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