Just thought I'd throw this in.  "Duct tape" is properly "duck
tape" as it was first made for WW2 to seal the containers of ammo.
Waterproof, high tack and sealing, but it could be removed.  The GIs
quickly found other uses for it and when they got home they spurred
the demand for it.  When the building boom of the 1950s hit it was
deemed a cheap, fast way of having unskilled labor assemble the duct
work in homes, so it was made with an aluminum outer skin.

As with Xerox, Coke and so many other terms in our culture, the word
has come to be a generic, sometimes misused word.  They did a whole
TV show on modern marvels of tape and had a section on duck tape.

Glen R. Perye Jr.

 [ See http://www.ducttapeguys.com/duckvsduct.html
 [ -- Robbie