See:
<
http://copperplumbing.org.uk/sites/default/files/content_attachments/guide-to-suitability-with-chemicals.pdf>
Oxalic acid is slow to attack copper, so rinse well after using it. It is very poisnous, use Nitrile gloves and eye protection. Look up the MSDS on using it. You are unlikely to want a strong solotution, but take precautions.
Malcolm
I don't suffer from insanity I enjoy it!
Mene, mene, tekel, upharsin
The writing is on the wall.
Ha-ktovet al ha-kir
--------------------------------------------
On Tue, 7/4/17, 'Brad' unclefalter@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
Subject: RE: [Homebrew_PCBs] Re: Ferric chloride staining PCB substrate
To: Homebrew_PCBs@yahoogroups.com
Date: Tuesday, July 4, 2017, 5:36 PM
Thanks!! Question – will Oxalic eat at
the copper traces if I’ve removed the resist already? I
haven’t on one board but the other I have. From: Homebrew_PCBs@yahoogroups.com
[mailto:Homebrew_PCBs@yahoogroups.com]
Sent: Tuesday, July 4, 2017 6:03 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] Re: Ferric
chloride staining PCB substrate Or just gho into the garden
and pick some Rhubarb leaves, lots of Oxalic acid in them.
Just don't eat any or drink what you make from boiling
them or the grass will be growing green over your prostrate
form.
Malcolm
I don't suffer from
insanity I enjoy it!
Mene, mene, tekel,
upharsin
The writing is on the wall.
Ha-ktovet al ha-kir
--------------------------------------------
On Tue, 7/4/17, roylowenthal@...
[Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com>
wrote:
Subject:
[Homebrew_PCBs] Re: Ferric chloride staining PCB
substrate
To: Homebrew_PCBs@yahoogroups.com
Date: Tuesday, July 4, 2017, 3:20 AM
Oxalic acid is also sold as, "wood
bleach" usually findable in hardware or
paint
stores.
Roy
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