Can a latex copy be made from a latex mold?

[dropshipbob]

I have an object I'm trying to make a mold from.

I have plaster, but the item I need to copy has very thin walls and I'm worried that if the plaster gets stuck in any undercuts, and I try to remove it, that I will shatter the object.

So my question: If I use liquid latex to make a mold, can I then use latex to make the copy? I know about mold release, but will it work in a situation like this?

What I'm trying to do: make a latex copy of part of a Terminator endoskull I have without destroying it, but using the materials I have on hand. This, for a Halloween costume.

Thoughts?

 

[dropshipbob]

*gasp*

Can it be? Has there been a question submitted to the mighty RPF....that it cannot answer???
Has the world gone mad??!!

 

[patsmear]

Of course not, just one we haven't seen yet!

I would be afraid of the latex sticking together, although, it may work with a layer of vaseline. When I do make up bladders for blood effects, I use a thin sheet of plastic bag beween the layers. I have a feeling vaseline would do the same thing.

what I would do is pour/paint some latex on a piece of glass. Let it dry completely, then put some on top of it.

When that sets, see how easy it would be to pull apart.


BUT with that said, you should be able to do a plaseter mold directly on the latex piece. Do you have a pic so we can see where the undercuts would be?

Is the piece solid? If so hard or soft?

Pat

 

[clonesix]

Ok, I read your question and decided to let the more experienced people handle it, but I'll give it a shot.

For an expert, with lots of experience with the material: It is possible.

For someone trying this for the first time: It isn't going to work very well.

For someone trying this for the first time, and needs it by halloween: NO, don't cause yourself this big of a headache. Go to ebay and buy a mask and cut it up for the piece you need.

 

[SgtFang]

Spray your mold with a few good coats of spray paint- it'll keep the latex from sticking to itself, but make sure you get the edges totally covered too.

-Sarge

 

[Danaedhel]

It maybe difficult; If you make a latex mold and a CLAY positive, you will be able to make another plaster mold of the clay piece. Then pour latex into plaster mold.

Maybe I'm having a shortcut :S

 

[vanpyre]

use baby oil on your ariginal and then cast if you dont the two latex creations will stick together and become useless the oil will was of after woods and presto you have your mould and if your talking the ear pieces by chance it shouldnt be hard to do
hope this helps
\

 

[aschultz]

Actually all you need is PVA parting film i got some from polymercompositesinc.com The film can be brushed on or sprayed with an airbrush.

 

[lonepigeon]

I've done some latex casting in the past and from my experience I'd say, no.
Latex 'dries' in a mold because the moisture is sucked out into the plaster. The longer you leave it, the thicker the skin. If you seal that inner wall of the mold with something the latex won't cure.

 

[stagelife]

yea it can be done depeonding how much of the rear (open) part fo the mold is open to air but basically if you have the means and the time make a resin casting then another "mold" to make you part. any pics so we can better see what your doing?