Homebrew PCBs

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
 
 
 
 
 
 
 
 
 
 #yiv3226884296 #yiv3226884296 --