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Post  Herr Döktor Mon Oct 27, 2008 2:30 am

Oh BOY! Now, there's a question! Simple answer: I've been making moulds and castings in various different materials for twenty years, and I'm still learning! It's become second nature, but I've had a quick scan of the web, and found what looks to be good explanation on Instructables: Click!

Because of the way silicone is, you really don't need a release agent; as for air bubbles, you need to make sure there are 'vents' to let the air out, you need to work out where the high ponts of your casting will be when you pour it; I use cocktail sticks attached to the original, and remove them to leave a smooth tapered riser.

Hope this is of help!
Herr Döktor
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Post  Alexander Edmund Clough Mon Oct 27, 2008 3:29 am

Many thanks Her Doktor old chap...

Had a look at that link, and I'm scared! Shocked

I wonder if (for a suitable fee) I might be able to secure your services as a mould maker for a one off custom moulding?

Alexander Edmund Clough
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Post  von Corax Mon Oct 27, 2008 5:18 am

Alexander Edmund Clough wrote:
How would I make sure I didn't get big air bubbles in the epoxy when I pour it?

Concrete slipformers and other concrete-forming systems use vibrators to remove air bubbles from the pour (and yes, aside from the much greater size, they look exactly like what you're imagining right now Embarassed ). Could something similar be used to remove air bubbles from an epoxy pour? (I suspect some sort of vibrating bench or work surface would be more practical than thrusting into the mould with an electric— Right, that's quite enough of that!)

von Corax
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Post  JingleJoe Tue Oct 28, 2008 5:32 am

Speaking of glowing things, anyone got some tritium vials I could have? Laughing
If so, lets do business!

_________________
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Post  Alexander Edmund Clough Wed Oct 29, 2008 4:27 am

I use a respirator when doing epoxy pours too. Seeing Herr Doktor's mention of his 3M one reminded me of that...

Von Corax old chap... I doubt a battery operated "anti hysteria device" would do the trick, but if I could get one of those mains operated "shoulder massagers" that might work Laughing

JingleJoe - Tritiums - you can order them from the chap who makes the WEE torches - http://web.mac.com/Lummii/Lummi2/Lummi_Home.html They don't show up in his online store, but if you email him and ask nicely he'll let you know how much they cost.

Alexander Edmund Clough
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