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Thread: mold release....

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  1. Default mold release.... 
    #1
    Join Date
    Feb 2012
    Location
    Farmington MO
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    95
    i have cast my first few mask and im noticing on my 2nd pull they are more difficult to pull then my first, is there something that will work as a mold release on the self at walmart. i dont really want to have to buy it online but if i do who has it cheap!! thanks for the help guys!!
     

  2. Default  
    #2
    Join Date
    Aug 2003
    Location
    Guatay, California
    Posts
    515
    What is the mold made of and what are you casting with?
     

  3. Default sorry should have said that 
    #3
    Join Date
    Feb 2012
    Location
    Farmington MO
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    mold is made of Ultra cal 30 and pulling mask latex
     

  4. Default  
    #4
    Join Date
    Nov 2008
    Location
    Mesquite, TX
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    2,788
    You should not need a release at all for that. Make sure the cast id completely dry and you should be fine.
     

  5. Default cool 
    #5
    Join Date
    Feb 2012
    Location
    Farmington MO
    Posts
    95
    thanks! i think maybe the 2nd time i had the latex to thin!! Hey Allen should have you new DVD showing up here in the next day or two. really looking forward to it. thanks again!
     

  6. Default  
    #6
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    Aug 2003
    Location
    Guatay, California
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    Any mold release will inhibit the absorption of the liquid and keep the latex from getting any thicker than a very thin skin. Because any plaster is absorbent, there will always be a little pullback when demolding, especially if there is a lot of texture. It's normal.
     

  7. Default that helps 
    #7
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    Feb 2012
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    Farmington MO
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    95
    thank you guys
     

  8. Default  
    #8
    Join Date
    Jun 2012
    Location
    New York
    Posts
    7
    ALL molds need release agents, except for some silicone applications. Especially if they are not sealed.

    Use steric acid. It is normally used as a release agent for GM foam latex. It is available from Alcone. It is cheap and works well for absorption casting.
    www.alconeco.com

    Derek B.
     

  9. Default  
    #9
    Join Date
    Nov 2008
    Location
    Mesquite, TX
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    2,788
    No, they do not. Unless the thousand or so masks I have pulled from my plaster molds have been a fluke.
     

  10. Default  
    #10
    Join Date
    Jun 2012
    Location
    New York
    Posts
    7
    If you use a release agent, the molds and the pieces pulled from those molds will be a better quality and last longer, that is why they make it.
    Does your piece have a white dust on the surface when you pull it? That white color is the surface of you mold.

    Slush latex it more forgiving. It is great for first timers.

    Try your technique in ANY with any other medium and your pieces will not look as good as the sculpture, if you can get them out. Also your molds life will be GREATLY decreased. Who wants to re-sculpt?

    I rather pull a thousand pieces from one mold then one piece from a thousands molds.
     

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