Homebrew PCBs

On Tue, 16 Jan 2007 01:07:55 +0100, D <wa4qal@...> wrote:

>
> It might be a good idea to check the solubility of Chlorine in
> water first.  And, even if it dissolves, I'm not sure that's any
> improvement, since it could later (when you least expect it) come
> out of solution.  In my opinion, it'd be better to react it to
> a nonvolatile form.


It's not actually just dissolved in water, it is reacted with a Cu2Cl2 to  
make two CuCl2 or something like that (i don't know nothing about  
chemistry).
The chlorine is produced too fast at the electrode or something, so it  
forms bubbles. If instead all the chlorine could be used to regenerate the  
etchant this may work well.

I know chlorine is nothing to fool around with, but i believe the tiny  
quantities created would be fairly safe to work with.

Industrial CuCl sometimes uses chlorine gas to regenerate, so there are  
ways to make this work. If one were to look at the industrial processes,  
how they get the chlorine to dissolve, the same might be done in small  
scale with the chlorine produced at the electrode making electrolytic  
regeneration a possibility.

As i said, if i would etch more i would look into it more closely, but  
chemical regeneration is so cheap it would be foolish to waste time with  
electroplating.

ST