Now I've got a pack of old floppies that are outgassing :0

I have no other explanation.

This is an almost-full box of miscellaneous floppies in one of the original cardboard trays of 30 from Office Depot.

I've got kilos more floppies in different closets but these are good ones I selected a few years ago that all passed SCANDISK.

Now this one little box is in an old ziploc bag in the office and it keeps self-inflating. At first I thought it was unusually low barometric pressure one day but I keep squeezing out the air rain or shine and it keeps on puffing back out by itself.

Something I really didn't expect.

If I did still own my own laboratory, I'd tell you what kind of gas it was by now though ;)