Homebrew PCBs

I have noticed this happens when there is less Acetone and what I do is either have a dripping tissue paper with acetone when I rub it off so the board does not dry out till all the black is gone or dip it in acetone and brush it off under acetone.
  This clouding happens only on some boards and there is no way of removing it once it is clouded, so I think there is some reaction going on between the board, toner and acetone as acetone evaporates.
   
  Kim
  

bagmik <bagmik@...> wrote:
  Hi everybody,

removing toner from a PCB after etching leaves toner impregnating the
epoxy, giving "black clouds" on it.

Does anyone of you get the same ?

Has anyone already solved the problem ?

Mike.



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