Pan pastel weirdness - any ideas on causes? Answered
These pastels were relatively smooth - aside from use - two years ago. They have never been exposed to moisture other than that in the air. They have been in a heated dry place in a covered box. I opened them for the first time in two years today and found some 'erupting' with white stuff. I'm guessing crystals of some sort... or maybe a very strange mold. Has anyone else had this happen or know what causes it?