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oipigface

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oipigface

When you drop a little acetone onto a piece of the packaging from a Pitbull ( I think it is expanded polystyrene, but can't be sure ), the foam packaging 'disappears' leaving no apparent residue. I imagine that gasses are produced. Anyone know what, and what the health consequences of inhaling it might be?

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Bobbyr

Try Just adding water John , it will dissolve .

            incredible really , its Biodegradable , heres a Video mate if this is the same sort of stuff

            Bob

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Biggles

This is not a chemical reaction mechanism but a dissolving mechanism. The polystyrene is literally dissolved into the acetone, like sugar in hot tea. The acetone will rapidly evaporate and theoretically leave the non volatile polystyrene behind. Because the expanded polystyrene is mostly air (or strictly the gas it has been "blown" with, thankfully for the ozone layer no longer CFCs) very little residue is left behind making it appear invisible. The biggest vapour given off is the evaporating acetone which, although not classified as hazardous, one should avoid breathing in, as one should avoid breathing in any solvent vapour.

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Phil.Taylor

John - youve just discovered the secret of a lost-foam glass fuselage...

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oipigface

Well, Phil, it's going to be carbon fibre and kevlar, but that's why I want to know.

Thanks for the detailed answer, Biggles. I knew someone on here would know.

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oipigface
14 hours ago, Bobbyr said:

Try Just adding water John , it will dissolve .

            incredible really , its Biodegradable , heres a Video mate if this is the same sort of stuff

            Bob

Cheers, Bob. 

Acetone's quicker!

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Simonbadock

Can't beat carbon and kevlar.

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