I'm looking for brighter ideas than the ones I have for keeping info on exposed film in the holder.
I drill little holes in the film guides which lets dots of light hit the film, the number of light dots corresponding to the filmholder. That way, if I make notes on whatever was exposed in filmholder #4, or have two near identical negatives, I can identify which was in which numbered holder. (Holders are numbered in the usual little white rectangle.)
I used to carry a little notebook to make notes on specific exposures, but lately have switched to little post-it sticky notes which I can attach to individual dark slides. They're still numbered so if they get separated in my backpack or wherever I can sort them out, (if I can find them, not a problem so far.)
I wrote on the dark slides with a white grease pencil a couple of times, but it was a minor pain cleaning it off, and I had to transcribe any notes I made.
Still looking for that perfect system... how do you folks do it?