Hi Following a number of helpful suggestions from many people, here are two sites for Kodak and Fuji film technical data Kodak (from Kodak homepage) http://www.kodak.com/global/en/professional/support/databanks/filmDatabankIndex.shtml Fuji (from Fuji UK homepage) http://www.fujifilm.co.uk/technical/index.html Thank you for all of your help Krisada ---------------------- Cranfield University