Homebrew PCBs

I don't know about sponging hcl.... I'm not that brave.
I always wear nitrile gloves and glasses but I try to keep distance 
between the wet work and me.


On 10/08/2016 10:33 PM, Dennis Shelgren nojoeco@... 
[Homebrew_PCBs] wrote:
>
> The hcl/peroxide mix has to be occaisionally "regenerated" by having 
> air put through it, like an aquarium bubbler/stone. If it's completely 
> activated with copper and fresh or regenerated, you can actually etch 
> with just a sponge it's that fast.
>
>
> On Oct 8, 2016 6:33 PM, "Rob roomberg@... 
> <mailto:roomberg@...> [Homebrew_PCBs]" 
> <Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs@yahoogroups.com>> 
> wrote:
>
>     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@...
>     <mailto: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
>>
>>     ------------------------------------------------------------------------
>>
>
>