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FROM THE June 2009 ISSUE

Making a mold dam

Tip: I recently bought an all-in-one "starter" casting kit at the local hobby/craft store, and soon realized I needed to make a mold dam.

I didn't have any Legos, and didn't want to waste my stock of sheet styrene, so I went through my collection of blister-pack scraps - the clear plastic packaging that everything come in these days. I save it all for dashboard and headlight lenses, windows, etc.

So far I've only cast a few pieces, but each time I've managed to come up with just the right size and shape of blister pack to do the job. They're also clear, so you can see any air pockets or bubbles in the casting material.

- Arnie Chamberlain
Tempe, Arizona

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