Homebrew PCBs

Stefan Trethan:

You are most likely correct in stating that hydrogen peroxide is 
available in some pool supply stores,
although  shocking the pool with chlorine seems to be the most popular 
treatment around here..

I get everything I need from my local Safeway supermarket.  The stuff is 
cheap there.

The readily available 3% peroxide does such a good job (for me, at 
least) that I can't
imagine anyone wanting to put up with the toxic fumes and possible eye 
or skin damage
that the stronger compound would present.  I sometimes heat the soup up 
a bit for a
faster etch, and this increases the caution in using the compound, let 
alone the possiblity
of toxic vapor attacking other items in my humble lab.

Besides, peroxide has a very short shelf life. It turns to just plain 
water in a relatively
short time. Thus a quart of the stuff at the supermarket for about l 
dollar should be
fine for the casual PCB cooker.

But, I'm a rather strange guy. I try to adhere to the adage:  KISS.

Again, I ask..........why are we discussing this ancient topic?

Roland F. Harriston, P.D.
********************


Stefan Trethan wrote:

>  
>
> No, pool supply stores also sell hydrogen peroxyde and 27% seems to be
> what I remember as well.
> But it was more expensive thant the 30% stuff from the chemicals shop.
>
> ST
>
> On Sun, Mar 6, 2011 at 7:52 AM, Roland F. Harriston 
> <rolohar@... <mailto:rolohar%40comcast.net>> wrote:
> > I think you have things a little screwed up.
> > I think that you (if you actually do) purchase muriatic acid, which is
> > actually
> > about 27% (30 Baume) hydrochloric acid  from your
> > pool supply store, or local building supply or super market, and you
> > most likely purchase hydrogen PEROXIDE
> > (about 2 or 3 %) from your local drug/variety store.
> >
> > Wow!  this thread gets more silly as it progresses.
> >
> > Roland F. Harriston, P.D.
> > ***********************
> >
> >
>
> 




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