33 Responses

  1. Judith
    Judith at |

    Hi, Jonni,
    Thank you for all the good information and the kind way you reply to all. I have been using latex molds to cast paper sculpture and have found the paper sticking to the mold.
    So, I am now ready to try silicone and have chosen Rebound 25 because it is brushable. But my models are of plasticine, specifically Van Aken because it is sulfur free. My question is, based on your experience with Rebound 25, is the plasticine too soft a material to brush on silicone? In other words, how does the viscosity compare with latex? My sculpts are very detailed so I’m concerned with pot life. I think Rebound 25 is 25 minutes. By the time you mix it, it is even less. Your sculpts are around nine inches. How long did it take you to brush the first coat on?
    Thanks again for your generosity.
    Judith
    ps I can relate to the garbage filled with rejects!

    Reply
  2. Jonni
    Jonni at |

    testing the thing to subscribe

    Reply
    1. Jonni
      Jonni at |

      testing once more

      Reply
  3. jim
    jim at |

    Some types of silicone mold materials (there are a few different chemistries) will not harden in the presence of chemicals that are in paints. I would definitely ask before using any silicone to prevent wasting that expensive material! Love your blog, Jonni! Thanks for all the tips.

    Reply
  4. How the Concrete Lion Head Came Out (Plus Tips on Using Quikwall…) | Ultimate Paper Mache

    […] And here’s an older post showing the process of making a mold with the Rebound 25: […]

  5. Tyra
    Tyra at |

    Hello,
    I have a question about undercuts when using a silicone mold. Does the silicon come out of the plaster mother mold or is it in there permenantly? If it’s permenant, doesn’t that defeat the purpose of a flexible mold? I guess I need to know more about unmolding the finished mask.
    Thanks,
    Tyra

    Reply
  6. shelly
    shelly at |

    Hello – love looking at all your beautiful paper mache art projects! I had a question about your molds – do you think you could make a mold from a finished project that has been painted already? would it ruin the paint job?

    Reply
  7. Joanne Gennarella
    Joanne Gennarella at |

    Hey Jonni – great work with the dog and cat – hope they don’t fight on the wall. But seriously, love these marvelous sculpts and subsequent molds. Curious to know – what specifically did you use to make:
    1) the original clay sculpt (which water based clay?) and

    2) what is the recipe for the clay for reproduction from the molds made?

    3) And finally, which mold material did you use?
    Lovely work that I’m sure a lot of time and careful consideration went into. Hope your holidays were great as mine. Looking forward to hearing from you. Yours, Joanne

    Reply
  8. Mike DeWolfe
    Mike DeWolfe at |

    This looks terrific. I’ve been experimenting with vinamold and I wonder if I could use it to do this process. Have you experimented with different smooth-on silicones or with vinamold?

    Reply
  9. alfredo
    alfredo at |

    hey jonni, been learning tons from your site, have it on my bookmarks, and I’m completing a series of sculptures based on your methods learned here! what kind/brand of water-based clay did you use for your animals?

    Reply
  10. Kim Hird
    Kim Hird at |

    Hi Jonni,
    Thank you for the tip suggesting I use the plaster/paper recipe instead of the paper mache clay recipe to use inside a mould. I will give it a bash.
    Also, I have gone to our hardware stores here and am not able to obtain “joint compound” in a powder form. Here, it’s all pre-mixed which is not what I need to make your paper mache clay. Would anyone out there who lives in Australia be able to advise me what I could use instead. It was suggested I use cornice cement as it has a gluey feel to it, but also dries quickly.
    Any suggestions would be really appreciated.
    Thanks again Jonni for your suggestion and I will give that a go.
    Regards
    Kim from Australia.
    (I noticed you had another Kim, so thought I would put down where I am from to differentiate between us).

    Reply
  11. zoe
    zoe at |

    i’m so happy i JUST found this AWESOME site!!! i can’t wait to go through every little detail… thank you for your wonderful ideas!!

    Reply
  12. Maggie
    Maggie at |

    Beautiful art, Jonni. I hope the new recipe works well for casting!

    Reply
  13. kim
    kim at |

    Sorry, I should clarify the silicone used @ YouTube is caulk…

    Reply
  14. kim
    kim at |

    Lovely work! I want to try the silicone.method I saw on YouTube to make a mold…have you tried that yet? If you’re interested I can find and send you the link-just email me. I love coming to your site and getting inspired!

    Reply
  15. Monica
    Monica at |

    Merry Christmas Jonni! Those are amazing! The wolf is quite realistic, but are you going to make the lower jaw? Wolves are my most favorite animal! I’d love to see it when its done!

    Reply
  16. Jessie : oil painter
    Jessie : oil painter at |

    I love these animals! They are so intense looking, and beautiful too.

    Reply

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