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my first guess was copper, but nickel... i think nickel IV is green (Ni(OAc)4 is) whatever it was its gone.

A little vinegar took care of it. If I notice it again, i'd try a solution of EDTA. The bristles are starting to hold up better now. Also, I have a col. Conk brush that is a little softer and...

I was also a little confused by this language. (i did get my money back, but didn't have to return it for some reason)

When the bristles started falling out I tried to return it to Amazon. They gave me credit and told me to destroy/throw it out. I just kept it because I liked the stiffness of the bristles a little...

I have a Parker brush about a year old. I got it from amazon here : Amazon.com: Parker Safety Razor 100% Silvertip Badger Bristle Shaving Brush (Black Handle) & Free Shaving Brush Stand: Health &...