[sdiy] PCBs

[Jaco Sloof]

--- John L Marshall <john.l.marshall at gte.net> wrote:
> Etch boards in microseconds - nitric acid + sulpheric acid +
> glycerine
> 

Is that nitroglycerine you mean, it will most likely etch the
surrounding chamber too if used in large quantities...

nice touch.... that would make a Synth board with a good Bass-boom...
> 
> ----- Original Message -----
> From: Jim Patchell <patchell at silcom.com>
> To: <synth-diy at dropmix.xs4all.nl>
> Sent: Thursday, January 03, 2002 7:04 AM
> Subject: Re: [sdiy] PCBs
> 
> 
> >      I think that is Nitric Acid....YikeS!
> >
> >    If it was Nitric Acid (HNO3), this would produce an orange gas
> (NO2),
> > which is very toxic.  If you want real fast etching, you add
> hydrocloric
> > Acid to the mix (HCl), which would probably reduce the etching
> time to
> > mere seconds....
> >
> >    However kids, please don't try this at home.  Nitric Acid is
> nasty
> > enough, mixing Hydrocloric Acid in with it can be downright
> dangerous
> > (the stuff will even disolve gold in this combination).  It also
> make
> > very nasty burns on your skin.
> >
> >    -Jim (reformed basement chemist)
> >
> > Sowa Roman wrote:
> >
> > > I agree totally with Jim.
> > > I don't do PCBs at home for a long time since I found out how
> nice and
> cheap
> > > they can be made at the fab. Myself I only make boards that can
> be made
> with
> > > Dremel cutting wheel.
> > > Just for the look of well made soldermasked PCB it is worth it
> to pay a
> > > little
> > > extra and not have fingers burnt with chemicals.
> > >
> > > But,
> > > when I was making them home, I used also nitrogen acid (not
> sure if it's
> > > proper
> > > english name of it). Good resuld in short time, but little
> dangerous
> because
> > > of
> > > produced gass (hydrogen?).
> > >
> > > Roman
> > >
> > > ""-----Original Message-----
> > > ""From: patchell [mailto:patchell at silcom.com]
> > > ""Sent: Thursday, January 03, 2002 5:29 AM
> > > ""To: sysyphus at sympatico.ca
> > > ""Cc: synth-diy at dropmix.xs4all.nl
> > > ""Subject: Re: [sdiy] PCBs
> > > ""
> > > ""
> > > ""    I learned to design printed circuits at my first job.  I
> > > ""would check the
> > > ""layouts done by the layout guy (this was back in the bad old
> > > ""days when this
> > > ""was done with tape on mylar).  Eventually, I started fixing
> > > ""the problems
> > > ""myself, and then when the layout guy went to another job, I
> > > ""took over those
> > > ""chores.  Doing layouts is more of an art.  If you want to see
> > > ""some good
> > > ""examples of PCB layouts, you can go to my web site.
> > > ""
> > >
> > >
> > > ---------------------------------------------------------
> > > This message has been scanned for viruses by MIMESweeper.
> > >
> > > Wiadomosc zostala sprawdzona pod katem wirusow przez
> > > oprogramowanie MIMESweeper.
> > >
> > >
> > >
> > >
> >
> >
> 


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