Quote Originally Posted by gwatson View Post
Hi Ian

I might be able to expand a little on the method Ian G suggests, since this sounds like the method I use.

Ruby lith film is basically a sheet of mylar with a clingfilm-like layer of lith film. You score your mask on the film side and peel away the red film. The mylar sheet can then go between the neg and light source (film-side down). I have only found the film on *bay in the UK, but I'm sure you can get it elsewhere.



PS: Sorry to Ian G if this is not the method he suggests.
Quite different, we used to make a photographic mask often from a drawn piece of artwork on lith/line film, processed in Formalith developer, (AN79/D85) these developers give good sharply defined edges. Often we'd make a 5x4 positive and then enlarge it to make a larger negative.