Does any one know where I can get a film I used one time that is like the
ones screen printers use, is coated blue and once exposed can be used as a
stencil for etching over and over again a good many times?
After being exposed it is put in a developer and developed for about 30
seconds. The great thing about this stuff is that it can be used as a
stencil repeatedly instead of having to expose a new board each time. You
can just keep using the stencil.

Thanks