Hi Bill,  I though of treating some imagesetter film with dye,
but there's no practical way to get the goods into the film.
It's designed for very rapid processing (under 1 minute), and as
such the existing dyes, anti-halo etc., wash out if one tries to
soak it in erythrosine (or other) solution. Imagesetter film
doesn't make a very good camera film, but it does make a very
durable film base if it's fixed and washed