Homebrew PCBs

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.com
Subject: 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.
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