Homebrew PCBs

Hi Jeff,

I did this a long time ago, I need to check my notes.
On the top of my mind, I used a regular water soluble emulsion and sensitizing,
I follow the instructions for mix the emulsion and sensitizing (9:1), for
apply the emulsion on the board and create a thin layer, I used a home
made centrifuge
(Old CD-ROM Motor and a CD). I exposed the board on a 500W halogen lamp and
for developing the board I used water for etching ferric chloride.

Leonardo

Em 15 de abril de 2012 21:47, Jeff Heiss <jeff.heiss@...> escreveu:

> Leonardo, can you elaborate on the chemicals you used and the process you
> used for applying, developing, and etching?  Did you use a recipe for the
> chemicals?
>
>
>
> Jeff
>
>
>
>  _____
>
> From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
> On Behalf Of Lessa, Leonardo
> Sent: Sunday, April 15, 2012 5:10 PM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: Re: [Homebrew_PCBs] Re: Alternative photoresist chemicals - Idea?
>
>
>
>
>
> Hello,
>
> A couple of years ago, as Vesko, I used homebrew photo resist based on
> chemicals used for silk screen printing.
> I have had a good results with this process however to achieve this results
> you must have some practice and patience.
> I have some pictures of boards that I did in the past with this process:
> http://tinyurl.com/cj7d5bn
>
> L. Lessa
>
> Em 15 de abril de 2012 16:54, Roland F. Harriston <rolohar@...
> <mailto:rolohar%40comcast.net> >escreveu:
>
> > I Gum Arabic photosensitive? And does it polymerize (harden) after being
> > exposed to light?
> >
> > Roland F. Harriston, P.D.
> > ******************
> >
> > David wrote:
> > >
> > >
> > > Another emulsion base for homebrew resist is Gum Arabic......
> > >
> > >
> > > >
> > >
> > >
> >
> >
> >
> > [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
> >
> >
> >
> >
>
> --
>
> Leonardo Lessa
> Linux User #65287
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [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
>
>
>
>


-- 

Leonardo Lessa
Linux User #65287


[Non-text portions of this message have been removed]