on antihalation effects I suspect it is also partially dependant on what is behind the film, i.e. palstic, metal or ceramic as to how much IR gets bounced back at the film. Rob C ============================================================================================================= To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there.