I have some mystery film that I might try to expose but I was hoping to get some insight from the experts here first. Has TMAX 100 ever been made in 8x10 sheets with no code notches on a relatively thin film base (thinner than ilford anyway)? Details: I got this in a set of 8x10 film holders off ebay. Don't know if it's been damaged by light or not but from the darkslide orientation seems to be unexposed. I pulled a sheet out, and it's got a very thin base (seems thinner than any of the 4x5 stuff I've used), has a fairly light purple layer on it, and is brown on the other side. (hah, I know). Maybe this will be helpful though: The holder I got the film out of says TMAX 100 on it (permanantly, so who knows what's really in there), and there are no code notches anywhere on the film. It was inserted "brown side down" with the light purple coating forward. Brown layer and purple layers seemed to wash off in water.