Hello
Here's a Maxell UR90 cassette I found recently that seems to be rusting - look carefully inside the little window and you can see something on the windings of tape.
I've never seen this before but I am guessing
a. it's the result of being stored in very damp conditions?
b. it's not really safe to play in a cassette deck without whatever that "rust" is falling off and mucking up the deck?
Any thoughts/explanations would be most welcome but since this is not a discussion thread you are welcome to post to my Flickr page
http://www.***********/photos/6733059...in/photostream
Jim D