In article m,
David Nebenzahl wrote:

For contact printing, nothing beats a decent contact frame (like my
homemade one) or just a piece of glass, and a single small light bulb
suspended over it.

Rubylith? Just use your enlarger timer; no need for masking.

The rubylith is for nice neat edges -- paper sizes not always lining up
perfectly to the film size, of course. It also helps with newton rings
sometimes -- you put it between the glass and the film, not on top of
the glass.

--
Thor Lancelot Simon
"Even experienced UNIX users occasionally enter rm *.* at the UNIX
prompt only to realize too late that they have removed the wrong
segment of the directory structure." - Microsoft WSS whitepaper