File puptcrit/puptcrit.0602, message 108


Date: Mon, 13 Feb 2006 14:41:08 EST
To: puptcrit-AT-lists.driftline.org
Subject: Re: [Puptcrit] Can you make a plaster of paris mold directly from


Hi Serra:
I'm sure you'll get several replys. Here's mine....

IF the head is made of Plasticene as you say   - the clay already has oil in 
it. In my experience of using oil clay (plasticene) I have never needed 
anything else to release the plaster from the model. Nothing.

In fact, if you put vaseline on the plasticene, I'm thinking that anything 
you put into the mold to make the head will pick up a coating of the vaseline 
which may be a problem when it somes to painting the head...

Couple of hints.... Plaster expands a bit on setting. So pulling it off the 
model will take a bit of effort. Try not to have too many undercuts in your 
model. Some details can be put in later.

Good Luck.
Fred Thompson

> I am working on a project where I need to make 4 duplicates of the same
> head...I am very short on time and need to crank them out asap...I
> would like to make a mold to make my life easier.=A0 Can I lather up some
> vaseline on the sculpted clay and do a plaster of paris negative mold
> in a shoe box with the sculped head in two halved parts? Then I could
> use celluclay or some such material to push into the negative mold of
> the head...? Or do I need do a plaster bandage strip cover on the
> sculpture and then make a positive mold, like I do when making masks?=A0
> It's a small head, so I fear it would lose detail this way...
> Any info is appreciated.
> Serra
> ____________________
> 

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