"Skeleton Man" <invalid@guestwho.com> wrote in message
news:SOidnU9h0aWXHMHVnZ2dnUVZ_r_inZ2d@wightman.ca. ..
| >Air duster cans containing just plain air are available ... but don't buy
| >them: they quickly run out of pressure because the contents is just
| >compressed gas. Some gasses (like R134 and "Freon") liquify at
reasonably
| >low pressure, so a can of R134 is mostly liquid that gradually returns
| >to gaseous state as it is allowed to escape. Result: a can of R134 gives
| >much more gas than a same-size can of air (which doesn't liquify at can
| >pressure), and the nozzle pressure remains constant until the last bit of
| >liquid in the can boils off.
|
| Thanks for the info. My concerns about air duster gasses are purely cost -
| all the ones I've seen are tetrafluoroethane (R134a) and cost about
$10/can!
| I figured maybe there was a cheaper alternative to this.
|
| I was thinking an air compressor would work, but that's likely too much
| pressure and moisture. The main thing I use air dusters for is cleaning
| boards and fans/air intake.

Look into one of the small (and portable) air compressors used by air brush
artist. Most have a dehumidifier and dust filters.

Alternatively pick up one of those portable tanks at the local aftermarket
auto parts stores (some wal marts have them as well) they can be filled at
most gas stations or you can use a 12 volt compressor (also available at
parts store and wal mart)