A method I found on http://www.apug.org and am using since then goes like that: take a 5 – 10 cm piece of the film you want to test. It shall be completely exposed to light. Take 50 – 100 ml of the developer you would like to use and pour it in a glass. Put … Read the rest
Found this document once I was browsing for technical data for long ago expired photo materials. You will find data for materials like sheet, roll and 35mm films manufactured by Ferrania, Agfa, Ilford, Kodak, etc.