Homebrew PCBs

Sorry, I didn't write the formula and it was over five years ago. I do recall I purchased the H2O2 from Sally Beauty Supply. I can look up the product label this evening. Maybe I wrote the formula I used somewhere.

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

----- Original Message -----
> From: "Spencer W" <upnxwood16@...>
> To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> Sent: Monday, May 14, 2012 9:26:18 PM
> Subject: Re: [Homebrew_PCBs] Re: Slow Etch?
> What ratio are you using? I would love to increase my etch times
> 
> Sent from my iPhone
> 
> On May 14, 2012, at 6:59 PM, Donald H Locker <dhlocker@...>
> wrote:
> 
> > I tried HCl with H2O2 (30%HCl with 30-volume H2O2 (about 9%, IIRC))
> > -- etched 1oz on FR4 fully in less than 10 minutes at room
> > temperature.
> >
> > Donald.
> > --
> > *Plain Text* email -- it's an accessibility issue
> > () no proprietary attachments; no html mail
> > /\ ascii ribbon campaign - <www.asciiribbon.org>
> >
> > ----- Original Message -----
> > > From: "Confidential" <scuba840@...>
> > > To: "Homebrew PCBs" <Homebrew_PCBs@yahoogroups.com>
> > > Sent: Monday, May 14, 2012 7:50:59 PM
> > > Subject: Re: [Homebrew_PCBs] Re: Slow Etch?
> > > We've tried 10oz copper a with Hcl/H2O2 on a ceramic dielectric.
> > > After
> > > several hours it was only about half way done. The addition of the
> > > PCB
> > > fab-in-a-box "TRF" gave us significantly better toner etchant
> > > resistance.
> > >
> > >
> > > I'll remember the bubbler trick the next time.
> > >
> > >
> > > -N
> > >
> > >
> > >
> > > ________________________________
> > > From: Leon Heller <leon355@...>
> > > To: Homebrew_PCBs@yahoogroups.com
> > > Sent: Monday, May 14, 2012 11:31 AM
> > > Subject: Re: [Homebrew_PCBs] Re: Slow Etch?
> > >
> > >
> > >
> > > On 14/05/2012 19:24, Spencer wrote:
> > > > I use the same solution and noticed heating doesnt help either.
> > > > The
> > > > biggest improvement in time that I get with my board came from
> > > > sticking
> > > > an aquarium air pump and with a hose with a bunch of holes that
> > > > I
> > > > did
> > > > from a sewing needle into the solution. I get about 45 minute
> > > > etch
> > > > time
> > > > now with my 1oz boards.
> > >
> > > When I tried HCl and H2O2 it was very fast, with no heating.
> > > Concentrated HCl is required,
> > >
> > > Leon
> > > --
> > > Leon Heller
> > > G1HSM
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Be sure to visit the group home and check for new Links, Files,
> > > and
> > > Photos:
> > > http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> > >
> > >
> > >
> >
> >
> >
> >
> >
> >
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> ------------------------------------
> 
> Be sure to visit the group home and check for new Links, Files, and
> Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> 
> 
>