Found a new way to screw up...

[SParis]

I was going through some boxes that have been in the basement since we moved 4 years ago, and found five 4x5 holders and a box of Forte 400 film. The film expired in 2005 and I have no idea when I loaded the holders, so I emptied them to put the holders back in rotation.

The picture shows what I found in not one, but two of the compartments.
The black paper is very thin, tissue-like, and even has code notches like the film.

Oops.

[Mark Sampson]

Ha! A mistake we all have made. At least those of us who have used film packaged like that. Luckily it's a mistake you only make once.

[Jim Noel]

I wish it was only made once. T^here was a time whenall sheet film was packaged with interleaving. Sometimes conditions, atmospheric I think, were such that the paper stuck so tightly to the film that it was too easy to overlook it.