Or a really big CO2 cartridge. An upside down can of air like used for
dusting out computers held upside down will squirt liquid CO2 at around -100
F. If you try this wear a very thick and well padded glove.

Tony

Liquid CO2? Are you sure that those computer dusting cartridges arent
using some sort of flourocarbons?





I've heard this old saw so often even I was beginning to believe it.
While it is based on fact, it's not seriously practical.

When released (in)correctly, it is true that a CO2 extinguisher will
make a pile of dry ice. But it's a very small pile compared to the
amount of CO2 gas released. It would have to be a Very Very Big (TM)
can in order to chill a that big of a slug of steel to below 0.


Discharging a CO2 extinguisher does not generate dry ice. The
expansional cooling of the compressed gas causes moisture in the air to
condense and freeze. The ice generated is the typical wet variety. Check
your sources.


Simple thermodynamics, dudes.

Sounds oversimplified.



Richard (woolly coat and all) Lamb

Dave