On Sun, 28 Dec 2003 19:54:42 -0800, Bill Turner
wrote:

On Sun, 28 Dec 2003 23:33:02 GMT, Mike Coslo
wrote:

Most denatured alcohol is denatured with methyl alcohol.

Methyl alcohol should be avoided around plastics because it will attack
some of the softer ones. Isopropyl is the safest of all the many
alcohols.

Before I retired I was a manufacturing engineer in the aircraft
electronics industry and ran many tests of this nature. I was never
able to harm any plastic with pure isopropyl, but methyl and ethyl both
caused damage to some materials. Of course, we were able to buy pure
isopropyl in 55 gallon drums. :-)

Yes, I have seen it that way, and we used enough to need the 55 gallon
drums.

Goes to show that reading labels is important for all sorts of things.

At another time, I was at a place which had a process which required
the pure 190 proof ethanol. As this was drinkable, it had an ATF tax
stamp just like you would see on a bottle of liquor.

Since the tax is proportional to the alcohol content, the tax was more
than the alcohol itself.

Happy trails,
Gary (net.yogi.bear)
------------------------------------------------
at the 51st percentile of ursine intelligence

Gary D. Schwartz, Needham, MA, USA
Please reply to: garyDOTschwartzATpoboxDOTcom