Substitue for Plaster of Paris?

M

mattd43

New Member

• Jun 24, 2010

• #1

Hey guys, well I made my first ever successful negative head mold last night and plan on pouring soon. However, what I have to pour the positive is a type of plaster of paris. Now, I've had some experience with plaster of paris, i even made a teeth cast and it breaks easy. I'm planning on being able to model prothstetics on this so I need a stronger material. Preferably some that I can pick up at a lowes or walmart. Suggestions?

 

rundown

Sr Member

• Jun 24, 2010

• #2

i hope your not serious on molding prothstetics :/
That isn't a thing you just wanto do for fun. It has to be ergonomic and user friendly. Most prothstetics are designed by people who have the knowhow, programs, machines, products to do this.

 

M

mattd43

New Member

• Jun 24, 2010

• #3

Merely film prosthetics my friend. Latex. Not like medical. You think quickrete would work?

 

P

piehead

Well-Known Member

• Jun 24, 2010

• #4

if your in the U.S. you would be better to use hydrocal or ultracal stone better yet urethane plastic or fibreglass (what we tend to use in the u.k.) also there some realy hard dental stones out there like dentstone k.d , diekeen etc

 

Raffles

Sr Member

• Jun 24, 2010

• #5

Definately some sort of dental plaster. You can grab it really cheap and it's very easy to work with.

 

00MrNotWrong00

Sr Member

• Jun 24, 2010

• #6

If you just want something cheap and hard you can give me a call :lol

No no I meant to say I'd use mortar mix and mix it up sloppy wet, that way you will get the smoothest possible surface. Agitate it with a stick like you would use a float to bring moisture to the surface and force out air bubbles.

This will most likely ruin your mold so if you want more than one you may have to take a cast for each head you want to make.

Also this stuff is heavy so you may want to do this a little at a time, so not to warp or brake your mold. Don't forget to paint the inside of your mold with a waterproof coating so the moisture doesn't soak into your mold and turn it into mush.

 

chuckyAPP

Sr Member

• Jun 24, 2010

• #7

I llike Durams water putty, you can mix it to be pourable and it cures rock hard

 

ChickenHaunt

Sr Member

• Jun 24, 2010

• #8

Ultracal-30 is what I use, and it seems to be the material of choice for inexpensive molds for the pros. You may not be able to find it at Lowe's or Walmart, but any molding/casting supply store should have it. I also hear you can speak to store owners who carry other US Gypsum products (like concrete) and request it. I get mine here: Douglas and Sturgess - Ingredients for Art - artstuf.com