Sometimes, it peels off. Some times, I can use a knife point to try to peel and it stays put. I think we are missing something on the surface treatment of the copper cladding.
To save on copper, electrical need and to keep copper cladding surface from being marred (without the brightening organic agent, plating can become very uneven), I use my .drl file, print a negative image, transfer the image then plate. This way the copper cladding does not get plated. Toner is non conductive thus copper under the toner does not get plated. And only the holes get plated.
smilingcat
--- In Homebrew_PCBs@yahoogroups.com, "Jeff Heiss" <jeff.heiss@...> wrote:
>
> I did experiments of plating copper clad using the same recipe but the
> copper coating was easily rubbed off. How is your coating durability?
>
>
>
> Jeff