Mold making help needed

[Wellss01]

I borrowed a fibreglass bust mold from work today and i am wondering if it is possible to take a plaster pull from it. It is a two part mould with no undercutting. What release is needed?


Check me out:
www.facebook.com/steamjunkprops Or Steamjunkprops.deviantart.com

 

[TessLaeh]

I work at a mannequin factory and we do fiberglass castings in a fiberglass mold all the time. I haven't seen plaster in a fiberglass mold- if anything I think the piece would break before the mold- but be careful if its something you are borrowing from work.

We use green soap (I think the technical term is Tincture of Green Soap) and Frekote.

Another good release for plaster is vaseline, but I would do the other two over that.

 

[CreatureFX]

I don't know if its a good idea to make a plaster cast out of it. Typically flexible molds are used to cast hard objects and hard molds are used to cast flexible objects.

 

[fettster]

As long as you are sure there are no undercuts, then it shouldn't be a problem, I second the use of dish spam as a release. Brush it in and let it dry

 

[Wellss01]

I had a successful pull with the plaster. I used Vaseline as a release, it has some air bubbles but for my first pull it turned out nicely.View attachment 138243


Check me out:
www.facebook.com/steamjunkprops Or Steamjunkprops.deviantart.com