Melting Acrylic/Plastic

[JAZZCNC]

How to tell whether its extruded or cast:
"Burn a piece , extruded burns silently and will drip molten balls , cast burns with a crackly/smokey flame and wont drip. "
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"Another point worth mentioning is that extruded stinks when it's cut but cast has an almost sweet smell."

Both are true but I'd say the sound is more a Sizzling that crackling sound. The smell is definately sweet smelling.

And on this forum, from John S in Feb 2013
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"Extruded has white backing on one side and clear on the other.
Cast has clear backing on one side and white on the other."
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Personally, I would only trust John.

You do realise John's favorite pass time was taking the Piss.!!

[cropwell]

You do realise John's favorite pass time was taking the Piss.!!

Who'd a thunk it. - Yes, I realise what the man is about, but I respect his opinion as an engineer.