Knew I had some references somewhere;

http://books.google.com/books?id=Cc6...xTSJzgWUtCrAN4

http://books.google.com/books?id=zaP...MAw-zI4RnUH1uM

http://www.flyanglersonline.com/feat...es/part88.html

If you do a search on dental floss and flies you will come up with a
lot more.

It is very strong and versatile stuff.The very large array of
synthetic flosses and threads now available is a modern phenomenon. At
one time silk was used more or less universally as dressing thread. A
material like dental floss, which is extremely strong, cheap, and
could be easily manipulated and coloured was of very considerable use
to many at the time.

TL
MC