Recently I purchased at a garage sale, about 1000 ft of expired 35mm bulk color slide film. All of it had expired in the 1990s. The majority of it was Kodak SO 366 slide duplication film and because I had the most it, I decided to test it first. The box speed was ISO 20 but I made a series of exposures at ISO 10 and film was cross processed in C41 chemistry. The results show that the film is still usable and I plan to use it in my pinhole cameras.
