Casting so that something shrinks

[CSMacLaren]

Is there a way to cast something such that the resultant casting is, say, 2/3 of the master's size?

I don't want to do too many successive castings. If one or two will do it, that would be great.

This is to help someone disabled who cannot fit in something truly 1:1 scale.

Thanks in advance!

 

[GINO]

Cast the item in alginate. The alginate wil continue to (for the most part) uniformly shrink as it dries out over a day or two's time. Just keep an eye on it and make your cast when it reaches the size you desire.
It's pretty amazing just how much it will shrink.

 

[yodakiller1138]

When getting supplies for projects in the past I've come across products that do what you want. I'm going by hazy memory, but I think the company was called Pink Eye Studios that had it.:cool

 

[CSMacLaren]

Thanks guys, I'll give it a shot!

 

[Rabittooth]

Cast the item in alginate. The alginate wil continue to (for the most part) uniformly shrink as it dries out over a day or two's time. Just keep an eye on it and make your cast when it reaches the size you desire.
It's pretty amazing just how much it will shrink.

Yup...we've used this stuff to do head casts. Usually they're destroyed after molding, but the ones we did keep without molding right away shrunk quite a bit. They seem to keep their detail pretty well too, although I'm not too sure about the uniformity of the shrinkage and if all your details will look as perfect as they did proportionally.

-Rabittooth