on Tue, Oct 30, 2001 at 10:25:54AM -0800, mmotyka@lsil.com (mmotyka@lsil.com) wrote:
Well, I was watching CNN and it looks like the Postal workers now are armed with a new weapon.. Against terror of course. THe whole cant read someone elses mail thing is out the window it looks like, they can spray this go on the letter and read through the envelope.. It seems implausable but its CNN, they dont lie right? well ANYWAYS, I now have a nice stash of black construction paper...
Yes, that would work nicely as the outside sheet.
Or "security" envelopes, possibly.
"You spray it on and it temporarily makes the envelope clear," said Robert Schlegel, vice-president of the makers, Mistral Security, of Maryland. "It leaves an odor for 10 to 15 minutes, but there is no smudging of ink, no stain, no evidence at all. The envelope is transparent for a few minutes and you can respray it hundreds of times without leaving any stain."
I would bet that there is SOMETHING that is dissolved by liquid freon. Just mark your letters with the stuff and look for the integrity of the mark at the other end.
First, is that what this spray is? Any information on the chemical composition? Freon's pretty chemically inert. That's among its advantages, though it's a liability in the upper atmosphere. Other options might be some indicator that notes a rapid change in temperature (evaporating refrigerant does a nice job of lowering temperature quickly), or presence of a fluid. Even a nonreactive chemical could float something loosely applied to a letter. Peace. -- Karsten M. Self <kmself@ix.netcom.com> http://kmself.home.netcom.com/ What part of "Gestalt" don't you understand? Home of the brave http://gestalt-system.sourceforge.net/ Land of the free Free Dmitry! Boycott Adobe! Repeal the DMCA! http://www.freesklyarov.org Geek for Hire http://kmself.home.netcom.com/resume.html [demime 0.97c removed an attachment of type application/pgp-signature]