I'm shooting titles, and upon the advice of everyone here (many thanks!), I managed to get a clear negative (aka Kodalith). BTW, all the printing places I talked to had no idea what a Kodalith was. Most places don't use negatives anymore (let alone Kodaliths), so be prepared for a lot of shopping around.
In any event, I'll be shooting my titles by backlighting the clear negative sheets, and was wondering what B&W 16mm film to use. I'm thinking about either Double-X or Hi-Con. Considering that my source (the clear negatives) is already hi-contrast, does it make a difference whether or not I shoot using hi-con film, or will double-x do?
Many thanks!