Would that be a blank piece of board or with some test pattern on it?
Rick
-----Original Message-----
From:
Homebrew_PCBs@yahoogroups.com [mailto:
Homebrew_PCBs@yahoogroups.com]
On Behalf Of David Griffith
Sent: Saturday, November 24, 2012 6:06 PM
To:
Homebrew_PCBs@yahoogroups.comSubject: RE: [Homebrew_PCBs] Re: Ratio of Ferric Chloride to copper?
On Sat, 24 Nov 2012, Rick Sparber wrote:
> I was looking for a rough estimate. We were starting with fresh ferric
> chloride for each 3" x 4" board and now see that it was not necessary.
> Maybe a better question is - is there a simple test to know when the
> ferric chloride is spent? Maybe put a single, very fine copper wire in
> the solution and time how long it takes to vanish?
A better model would be a 1cm square of scrap pcb material.
--
David Griffith
dgriffi@...
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
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