Film types:
Actually I think Ilford Delta Pro would have very suitable characteristics -
either version (based on information from the BJP review some while ago by
Geoffrey Crawley.)
Haven't tried it though. Have you Terry?
Peter Marshall
Fixing Shadows and elsewhere:
http://faraday.clas.virginia.edu/cgi-uva/cgiwrap/~ds8s/Niepce/peter-m.cgi