Thanks, PE, I suspected as much, but it's nice to have a little confirmation.

This brings up another question, though, and not just directed at PE.

It seems like we're transfering all of the health and environmental handling concerns from the dichromate to the permanganate. If one of the goals is to come up with a carbon process with fewer potential risks to human health and the environment, it seems like an alternative clearing solution should also be investigated. Would a strong hydrogen peroxide solution (say, 10%) serve a similar role?

--Greg