Homebrew PCBs

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@...

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