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Rob,
You could try the sponge type paint brushes. That would get you the sponge effect, and still keep your fingers out of the soup.
Yes, of course gloves and glasses are required when working with anything volatile.
On Oct 8, 2016 8:52 PM, "Rob roomberg@... [Homebrew_PCBs]" <Homebrew_PCBs@yahoogroups.com> wrote:
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@... [Homebrew_PCBs]" <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@... [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