I there, just a newbie to the site, but already have a rather challenging question! Does anyone know what a Print Whistle is??? I suggested to my photograpy instructor if it has anything to do with the old steam-powered film developers and he said I was sort of on the right track, but still not correct. Apparently it is an old term (hence why I have put this query in the Film section of the forum - as film has been around awhile!). I am tearing my hair out trying to find out what a Print Whistle is but to date, can't figure it out. I am really hoping someone here will know! Thanks, J oh - and its a legit term - my instructor isn't trying to trick me!