It might have been caused by that bit of old cheese I found at the back of the fridge. :-}(posted 9240 days ago)A film's life will, of course, depend on its history. I've bought it in blocks, and singly from shops, and haven't kept track of what I bought where. I got through about 30 rolls last year, with many variations in background fog. Some of these can only be seen by comparing a 'new' film with one a few months old.