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Subject: Re: [Homebrew_PCBs] Re: 0.5mm pitch breakout board?

From: DJ Delorie <dj@...>
Date: 2007-08-18

"Andrew" <andrewm1973@...> writes:
> Some tracks (6-8 thou) almost got etched completly away on one side
> of the panel before the other side was clear of copper.

Have you tried the sponge-wipe method? I've found I can manually
control the etch progress that way, so it all comes out even.