Re: [ATM] Does glass retain moisture?

["Bob May" <bobmay@nethere.com>]

When you start discussing such things as water in glass and so forth, you
really need to sit down and consider at what level water in glass is real
and when it isn't.  For example, today's silicon ICs would only 50 years ago
be considered pure silicon that was barely able to be processed in the
laboratory yet tody, not only do we make the stuff in huge quantities, but
all of the impurities that are in the silicon are on the top side of the IC
where they do functions with some electricity!
Thus, water in the glass may be very tiny but there is indeed some if you
really look for it.  What you may think of as pure today may have all kinds
of impurities in it in some future time.
As to adsorbing water into dental stone, yes, dental stone will accept a
fair lot of the stuff but it is a mechanical thing rather than a chemical
thing after the stuff is cured.  This is why the plaster industry doesn't
call dental stone waterproof as it does accept water into the spaces inside
the material - it just doesn't cause any chemical activity like plaster of
paris does.
Bob May
http://nav.to/bobmay
bobmay@nethere.com
NEW! http://bobmay.astronomy.net


_______________________________________________
ATM mailing list http://www.atmlist.net/