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Hydrospan 100 is a special “englarging” casting resin that swells, on curing, to 160% of its cast size. Surface details are well-preserved.

Continuing our monthly materials themes for 2012, in October we’re featuring materials used in molding and casting. That’s a broad area, so in keeping with the spirit of the spooky season we’re focusing in mostly on non-metals—polymers and composites and stuff—of the type that are commonly used to cast costume parts and props. From plaster-of-Paris to platinum-catalyzed silicone rubber, if it can be poured into or around a mold, and then sets up to form a more-or-less solid part, it’s fair game!

As always, if you’ve got a hot link or a subject you’d especially like to see covered under this theme, don’t hesitate to let us know, below!

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Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.


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