> Andy writes > if you use FB paper you can wax/oil them, hence increasing their > transparency.
A recent article in my local paper (The Boston Globe)
reports on an article in New Scientist of Dec 16, 2000, that
Mistral Security of Bethesda, MD has developed a spray
called See-Through that turns paper transparent for 10-15
minutes and then vanishes without a trace. For police use
of course. :-)
http://www.mistraldetection.com/seethrough.htm
