On 10/8/2009 3:54 PM David Nebenzahl spake thus:

On 10/8/2009 2:36 PM laran spake thus:

What is ruby lith? I need to find a source and don't even know what it
is (using as my red filter for my enlarger - possibly)

Rubylith (one word) was (and still is, if it's still available) a trade
name for transparent red masking film used in the graphic arts [...]

Yep, it's still available: f'rinstance,

http://www.hyatts.com/sign/ulano-rub...15x50yd-T36645

(a little pricey at this site--$213 for a 50 yard roll. Might want to
shop around a little ...)


--
Found--the gene that causes belief in genetic determinism