Homebrew PCBs

--- Adam Seychell <adam_seychell@...> wrote:

> Commercially they use sodium hypochlorite ("pool
> chlorine") mixed with NaOH to make black oxide film
> on PCB s prior to lamination of inner layers.
> Apparently the epoxy sticks a whole lot better 
> to Cu oxide than to the metal. 

How about a solution composed of NaOH and H2o2? 
You will get:

Cu(OH) Blue in color
Cu(OH)2 Black in color.

If you apply heat, the Cu(OH) will be oxidized to
Cu(OH)2.



Best regards

Marvin Dickens 

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