Homebrew PCBs

By 'corroding' you really mean 'etching' right? I didn't know that 
oxidized copper makes a difference in etching process. Is that what 
others observed? It may take a bit longer but does it really cause 
etching problems? Mike


--- In Homebrew_PCBs@yahoogroups.com, "Alexandre Souza" <alexandre-
listas@e...> wrote:
> > It sounds like the stuff glossy magazines are printed on. It might
> actually
> > be similar to the paper Microchip et al use for their flyers - 
glossy,
> about
> > 100gsm, like thin card.
> > The stuff magazines are printed on tends to be much thinner - 
probably
> around
> > 70gsm.
> 
>     Exactly that. I use 150gsm paper, and let the board soak in 
water. I
> brush my fingers in the paper to take the "first layer" of paper 
out, let
> some time more to soak the second layer, and brush it again with 
fingers to
> take all the paper out. After that, a good toothbrush with soap to 
clean
> everything, and the board is ready to be IMEDIATELY corroded - if 
you let it
> oxidize, it will be a nightmare to corrode.
> 
> 
> ---
> 
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