[meteorite-list] Membrane boxes go boom?

[tracy latimer]

I am observing something weird with some of my older membrane boxes.  The membrane is starting to degrade and go cloudy, and in at least one specimen (Imilac, bought at Tucson, I forget the year) the membrane has ruptured and the slice is rattling around loose in the box.  Has anyone else had this happen to their specimens?

Best!
Tracy Latimer