gelatine molds

[dmosher]

Has anyone ever tried using gelatine as a quick and dirty mold. Any idea if it would hold a cast for a quick body part mold or something similar?

D

[DEDFX]

Gelatines way too flimsy, it would never work.

[bloodymess]

it depends of the consistency; if you prepare it in a 50/50 mixture, it might work if the object is small and if you cast it in a short amount of times(minutes). however, plaster and ultracal generate heat as they set, so that could melt the gelatin if used for the cast.

if you use a material like resin for the cast, however, it could work.

but don't forget to build a mother mold, so that the gelatin can't warp.

[dmosher]

Thanks alot! Any resin you would suggest?

D

[DEDFX]

Don't use ANY plaster molds for gelatine, The water that basically makes the gelatine absorbs into the plaster and all you get is powdered gelatine.

[bloodymess]

that's true when you don't coat the mold with mold release. but why you would cast ANYTHING from a plaster mold without mold release is beyond me. a thin layer of vaselin is all you need; the oil in it seals the plaster so no water from the gelatin gets absorbed.

and btw, the topic is not about casting gelatin in a plaster mold, but using gelatin as a mold

[dmosher]

But thanks for the clarification Bloody! yes I am asking about making the actual mold out of gelatine. I want to try a leg or face mold and am wondering if it will work and if it will be flexible to get my foot out, and what to pour into if I do.

[bloodymess]

oh, life casting? then it might be a problem... in a one piece mold, it'll probably tear, and gelatin liquid enough to make the mold will be scolding hot, near boiling point. unless you want to burn yourself, pay a few bucks more and buy alginate.