kenk Posted June 25, 2015 Report Share Posted June 25, 2015 does any one have a link to a video that teaches you how to make a plaster mold, for a cup, bowl? Link to comment Share on other sites More sharing options...
Chilly Posted June 25, 2015 Report Share Posted June 25, 2015 Look on YouTube, there's quite few, both one-piece drop moulds and multi-part moulds. Link to comment Share on other sites More sharing options...
CroneRanger Posted June 26, 2015 Report Share Posted June 26, 2015 Grease up the bowl or cup you want to use with wd-40 or Armour All (my favorite.) Mix the amount of plaster needed and for the mug or bowl to the top. Make sure you use bowls and cups do not have inner curves or the mold won't come out. I make molds out of all sorts of found objects. There are lots of good trays and bowls at Target or places like that. Have some fun! Beth Link to comment Share on other sites More sharing options...
kenk Posted June 29, 2015 Author Report Share Posted June 29, 2015 thanks for the advise. Ken Link to comment Share on other sites More sharing options...
perkolator Posted June 29, 2015 Report Share Posted June 29, 2015 DO NOT use grease, WD-40, vaseline or any other oil-based substance like suggested above, as your mold release. The whole point of using plaster is to take advantage of the capillary/wicking action of the material, to pull water from the clay and set it up faster - if you go and use something oil-based as a mold release, you've now clogged the pores and severely diminished capillary action, if any at all. Use actual "mold soap" or purelube/greensoap, which are the products that should be available from any ceramics supply. Alternative is diluted Murphy's Oil Soap. Link to comment Share on other sites More sharing options...
CroneRanger Posted July 5, 2015 Report Share Posted July 5, 2015 DO NOT use grease, WD-40, vaseline or any other oil-based substance like suggested above, as your mold release. The whole point of using plaster is to take advantage of the capillary/wicking action of the material, to pull water from the clay and set it up faster - if you go and use something oil-based as a mold release, you've now clogged the pores and severely diminished capillary action, if any at all. Use actual "mold soap" or purelube/greensoap, which are the products that should be available from any ceramics supply. Alternative is diluted Murphy's Oil Soap. I guess all my molds that I have been using for years don't work. Perk, have you ever considered there is not only one way to do something?? I've been making pottery and using molds for a long long time I would not mislead someone. edited by Pres Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted July 5, 2015 Report Share Posted July 5, 2015 Dish soap also works in a pinch. I was taught that if you use an oil based release agent (since not all of us need a lot of mould soap in our lives,) you should use acetone to clean the release out of the mould before the first casting. There are many roads. Link to comment Share on other sites More sharing options...
Judy_in_GA Posted July 5, 2015 Report Share Posted July 5, 2015 One of the many reasons that I love this forum is because everyone is typically polite with no naming calling or piling on. Link to comment Share on other sites More sharing options...
Lampman Posted November 22, 2015 Report Share Posted November 22, 2015 DO NOT use grease, WD-40, vaseline or any other oil-based substance like suggested above, as your mold release. The whole point of using plaster is to take advantage of the capillary/wicking action of the material, to pull water from the clay and set it up faster - if you go and use something oil-based as a mold release, you've now clogged the pores and severely diminished capillary action, if any at all. Use actual "mold soap" or purelube/greensoap, which are the products that should be available from any ceramics supply. Alternative is diluted Murphy's Oil Soap. Link to comment Share on other sites More sharing options...
ronfire Posted November 22, 2015 Report Share Posted November 22, 2015 I like to use Pam spray on the solid plastic moulds I use as it is non toxic and cheap. Link to comment Share on other sites More sharing options...
Mug Posted November 22, 2015 Report Share Posted November 22, 2015 James Adams gives some of the best jaw dropping Instruction I have seen on how to make plaster molds I would look at his videos they were really helpfull to me Link to comment Share on other sites More sharing options...
Mug Posted November 22, 2015 Report Share Posted November 22, 2015 This is a better link basic mold Link to comment Share on other sites More sharing options...
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