--- 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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