Homebrew PCBs

Acetone is a solvent that actually coftens the resin
used to make PCBs. Soaking the board is not a good
idea. I just rub mine with a paper towel moisend with
acetone.

Bob Macklin
Seattle, Wa.

--- Kim Vellore <kimvellore@...> wrote:

> 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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