Originally Posted by pvaudio
Well, assuming you don't store psychedelic mushrooms in your stringing tray, I would presume that your tray was made with some form of a fumarate. Fumaric acid is used to make some polyester resins, which, when combined with isopropyl compounds creates a purple-blue substance. Since your tray looks like it's rather old, I would presume that's what happened.
Boom. Looks like the right answer. Indeed the tray is pretty old. Is this dangerous in any way?
EDIT : Never mind. Wikipedia solved my question.
Racquet : TGK238.1 2X / Head YTPP 1X
Strings : BHB7 17G 49lb / LUX 4g Rough 17G
Last edited by Andyroo10567; 12-03-2012 at 07:00 PM.