[time-nuts] Fan Filters
Charles P. Steinmetz
charles_steinmetz at lavabit.com
Wed Sep 15 21:20:28 UTC 2010
>Urethane technology has come a long way since the 5370 came
>out... but given time, all urethanes seem to revert to their primordial goo.
It was for this reason that I started using the ScotchBrite
sheets. 3M originally supplied both uncoated and abrasive-coated
material (the latter marketed for metal finishing and automotive
painting applications). I have both, and it is not hard to tell the
difference. However, my stash is over 20 years old, and I do not
know what 3M makes now (in particular, whether they still supply
As others have noted, there are several sources of materials that are
intended for air-filtration service.
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