Homebrew PCBs

Simao Cardoso wrote: 
> boombox666 wrote:
> >I regenerate my sodium persulphate with a platinum and copper electrode,

> But no more info anywhere. Any academic paper about this. 


After sleep i give it a try, but instead a simple google search, i found
what seems to be it, with google academic, going between references.

Patent from 1972 Benjamin E. Nayder (Western electric Inc NY)
US3843504 Method of continuously regenerating and recycling a spent
etching solution

I will read it later...
Thanks in advance.


BTW My last post lacked this link:
http://www.epa.gov/dfe/pubs/pwb/tech_rep/ctech/index.htm
Which compare activation methods.

And when i said resistance/resistant/whatever i always mean electric
resistance not material hardness or so.

Sim�o