Is there someone that can help me regarding Polaroid 55 type film. I am working on a project with this P/N film and am struggling with how to clean/harden the negatives once they have been shot and processed. I have read a ton of stuff on the internet, and googled the heck out if it. I have read about sulfate and certain chemicals to use but I just need someone to explain it real basic for me and list the exact chemicals to purchase. I just don't understand what to do and the dilutions to use. Any help is truly appreciated.