The contents of my Dust-off can include difluorethane. This is a
refrigerant also known at HFC-152a.
As with all refrigerants, as the liquid in the can expands to a vapor as you
spray it, it absorbs heat from the surroundings (the latent heat of
vaporization). That's why the can gets real cold!
Tune in again another time for more from Dr. Science ......
PS for those who are just dying to know, HFC stands for hydrofluorocarbon.
These materials don't deplete the ozone layer but may contribute to global
warming
end
Regards
Bruce Appelbaum
Yorktown Heights, New York
----- Original Message -----
From: <Doggre@xxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Sunday, February 04, 2001 7:11 PM
Subject: [OM] Lens Cleaning Solutions, Part II
> Oh, and for those who haven't tried it, the canned air ("Dust Off", in my
> case) gets cold as you use it (REAL cold, if you use enough), and the
> pressure falls off correspondingly. Had to warm it with my hands, wait,
give
> another shot, warm it, etc. Of course this wouldn't present a problem
doing
> just one lens.
>
> The little air "bulb" would seem safer, more convenient, and FAR cheaper.
>
> Anybody wanna buy about $8.21 worth of canned air?
>
> Rich
>
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