I Picked Up Some Old 4X5 Royal Pan _X 4141 Film When I Developed It It Foged A Little. My Question Is,How Do I Use Benzotriazole To Defog Film Wile Developing? This Was The Product KODAK Told Me To Use. I Figure This Film Will Not Cut The Mustard For Showing,But At Fifty Cents A Box Of Twentyfive Sheets Its Worth A Try. Thank's Pete Lucchini(posted 8200 days ago)