Homebrew PCBs

Hey, Adam.

Is it OK to save and distribute to friends copies of your [excellent] write-up of CuCl2 etchant chemistry?

Many thanks,
Donald.
--
*Plain Text* email -- it's an accessibility issue
()  no proprietary attachments; no html mail
/\  ascii ribbon campaign - <www.asciiribbon.org>

----- Original Message -----
> From: "Adam Seychell" <a_seychell@...>
> To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> Sent: Thursday, May 10, 2012 2:46:46 AM
> Subject: Re: [Homebrew_PCBs] Re: Long-Term CuCl2 setup
> On 10/05/2012 10:44, John Anhalt wrote:
> >
> > Are there any etchants used by hobbyists that are not acid?
> >
> > Why not just have an "etchants" folder for everything?
> >
> > John
> >
> Copper (II) Ammonia chloride/sulfate etchants are alkaline but really
> need a automatic replenishing system to keep them working well. They
> also inherently release ammonia so not practical for just the
> occasional
> use. There have been attempts to run the ammonia concentration very
> low
> so it doesn't smell, but solution turns to sludge (copper chloride
> precipitation) at the drop of a hat.
> Air regenerated acid copper chloride is still my favorite. :)
> Its only disadvantage is its etches about 1/2 speed of fresh strong
> solution of ferric chloride in the same conditions.
> 
> 
> [Non-text portions of this message have been removed]
>