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Casting Two-tone resin/Which brands of silicone/resin do you use for casting?/Casting bubbles

Aug 12, 2011

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    1. I have never casted before and am planning to cast my own dolls in resin. They will be two-tone dolls if I find out how to do it. Does anyone have a good way to do two-tone casting?

      Also, which brands of silicone/resin do you use for casting? Why do you like it? I've seen lots of different brands of silicone and resin but I don't know which one I should pick...

      Another big question: I'm really set on keeping bubbles out of my silicone/resin. I know without vacuum pots/pressure pots it's more difficult, but my mom has said a definite "no" to pressure pots, and "probably not, maybe" to vacuum pots. I heard somewhere that using an airbrush to get rid of bubbles can help, does anyone have any other tips or have doubts about the airbrush idea?
       
      #1 StarryDream, Aug 12, 2011
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    2. When you say two-tone do you mean a single part cast using two different colours? I know Enabi cast a cyborg a while back doing two-part pours - its intense and problematic in as much as huge amount of time to prep and so easy to make a mistake.....

      Keeping bubbles out of your silicone without the right equipment neednt be problematic if you put a brush-coat on the master first and then high-pour the silicone in a thin stream to encourage the bubbles to break as you pour also using a low viscosity silicone like Oomoo or Pinkysil will reduce the number of bubbles in your molds. For preventing bubbles in your resin if you are certain to put your sprues, vents and pour gates in the right place with no undercuts where air can get trapped the majority of your bubbles with rise up and out of the main part of the mold.... Dan Perez explains it well in this tutorial:
      http://www.danperezstudios.com/workshoppages/molding_casting.htm

      I've never heard about airbrushing but if you have surface bubbles that are worrying you a blast of air will help break them :)
       
      #2 whitewings, Aug 14, 2011
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    3. @whitewings - Yes, that's what I mean. Sorry for not being able to explain more properly. ^_^"

      What a great tutorial! Thank you so much for the link.
      I think I've heard of that method before but I wasn't quite sure how it would work...I think the link helped a lot. :)

      Ohh, I do have an air canister for keyboard dust, I guess I could just purchase a spare and use that! Much less expensive and it still serves it's purpose. Thank you again for your help!
       
      #3 StarryDream, Aug 15, 2011
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    4. I did a little research into how to get bubble free silicon and resin, and just a pressure pot should do the trick according to this page http://www.conceptart.org/forums/archive/index.php/t-101749.html
      This video also shows how to make a mold bubble free using a pressure pot and also a bubble free pouring technique http://www.youtube.com/watch?v=NVvGc7VDFvc&feature=related

      If you're worried about costs, maybe you should rethink casting altogether. I don't want to discourage you! But even just the resin and silicon will end up being expensive. My own attempt was pretty discouraging, and I'm still not ready to try again.
       
      #4 Yukamina, Aug 16, 2011
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    5. I'm also curious about two-tone one piece casting. I may or may not wind up using it, but I'd still like to know how to do it. It seems very interesting.
       
      #5 eristell_neko, Sep 9, 2011
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