Prolink Turns Black??

Steve Sr. wrote:
Hello,

I recently switched to Prolink and have noticed that whatever this
stuff is it goes on clear but comes off black! Does anybody know what
this black residue is? I find it hard to believe that it is road gunk.

It's all the stuff that got flushed out of your rollers in your chain.

Could this black residue be part of the chain or maybe a reaction by
product of Prolink and the metal in the chain? It appears that Prolink
got started on coal mining equipment where everything is already
black and wouldn't notice a little more.

There's lots of dirt in the air and stuff kicked up by the rear tire.

--
Phil, Squid-in-Training