Re: Sand blasting with Dry Ice

Posted by Dan in Ore on November 21, 2003 at 03:29:49 from (198.81.26.167):

In Reply to: Sand blasting with Dry Ice posted by Justin on November 20, 2003 at 13:22:39:

They used to use one where I work. Don't know why they quit.

The theory behind it goes something like this.

When you hit whatever you are cleaning with the dry ice, first there is a huge temperature difference that causes the grime to contract lifting it from the surface being cleaned. Then the beads of dry ice hit the surface and acts similar to sand. When the dry ice hits the atmosphere and warms up it becomes carbon dioxide and therefore there is no residue other than the stuff that you blasted away from the parent material.
I always thought it would be interesting to try it, but never got the chance.

Dan

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