Just returned from the POG at the Reno Hilton, picked up some more traders in Reno and Sparks. When I was putting away some of the new Eldorado $1 chips, I found the one shown which I had picked up last January. It had been stored since January in a rack next to one of the new red $5 Eldorado chips.

I recall another post on this subject where the problem was thought to be that the red chip had been wet when it was put next to the white. Not this time--both were brand new last January and neither had been cleaned or wet.

To make it worse, after scanning this chip, I tried to remove the stain with Armor All All Purpose Auto Cleaner--no luck, it's permanently stained.