Quote Originally Posted by dpurdy View Post
Probably should come up with a numbering system written on the holders and always use them in order.
Pretty much what I do. I write in my notebook each film holder and what film I've loaded it with. As I use them, I cross them out in the book and on a seperate page record any exposure info I want. I do flip the dark slides but don't rely on them, I go by what my book says.