does your vendor got small plating tank that not suitable for your  
large panel? (insufficient stir or agitation?)
just curious. (i know it kills the cat)
jk
On Apr 4, 2019, at 9:32 AM, Jack Olson wrote:

> I'm not used to looking at micro-sections, but I was looking at a  
> photo and
> noticed what looked like two layers of plating on top of the original
> copper layer.
> When I asked about it, I was told that the bare board supplier  
> flips the
> board 180 degrees and plates again, trying to get a more uniform  
> plating
> thickness across the panel.
> Is this a common practice?
> I haven't heard of that.