Homebrew PCBs

My bottle of muriactic acid is at least 10 years old.
I only use about a shot glass of the stuff each time I etch boards.
I think thats about  50 ml.... so a 950ml bottle will etch 19 batches......
and a bottle costs $5 at the local hardware store......
so I don't think I will be using ferric chloride ever again.



On 10/08/2016 09:18 PM, soffee83@... [Homebrew_PCBs] wrote:
>
> Rob,
>
> My guess is it's mainly for ferric chloride and stuff. That mix you 
> and I are using seems to generate its own heat somehow, though I have 
> heated it when it was acting weak. I still haven't figured out why 
> mine got weak, but I'm guessing it's shelf life.
>
> Take Care
>
> 
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