Homebrew PCBs

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.
***********************


Jim wrote:

>  
>
> I buy and use 27% hydrogen peroxide sold at the pool supply store ...
> It seems some people don't like green hair caused by chlorine that most
> people
> put in their pools. The people that I have questioned about using 27%
> H2O2 in
> their pool say it is better than the chlorine.
> One gallon of 27% H2O2 costs $19
> I save my used etch (it is dark green) and add about 7 milliliters of
> 27% H2O2
> to 300 ml of used etch to etch a board.
> Jim KI6MZ
>
> On 3/5/2011 4:40 PM, Harvey White wrote:
> > On Sat, 5 Mar 2011 15:54:37 -0800 (PST), you wrote:
> >
> > Stuff they sell in beauty shops is designed to be nice to your scalp,
> > so has (most likely) extra ingredients, so you now will have long
> > silky flexible PC boards that shine as if this was your normal PC
> > board color.
> >
> > I just buy the cheap stuff at the drugstore....
> >
> > Harvey
> >
> >
> >> Well heck .. this one is all blow outta the water.
> >> I went to the beauty supply place ..
> >> Theirs is 10, 20 and 30 VOL .. dangit ..
> >> AND .. to top that off it has other ingredients ..
> >> Best I could find was hydrogen peroxide , water , phosphuric acid.
> >> Though thinking back on the older days of REAL Coke Cola ..
> >> I wonder if the phosphuric acid / H2O2 mix by itself would etch ?
> >> OK .. where is that fellow .. that was talking chemistry and molarity.
> >> ok .. found his email .. JROD .. Hope you pipe in here .. :)
> >>
> >> Cant figure it out myself .. I did try .. need to learn more 
> chemistry .
> >> Dont know if phosphuric acid is above copper on a redox table ..
> >>
> >> Oh well .. on to more studying .. and hope that JROD sees this
> >> and after his laughing .. replies .. lol
> >>
> >> Randy - N2CUA
> >>
> >>
> >>
> >>
> >>
> >>
> >> ________________________________
> >> From: Randy S.<rj3819@... <mailto:rj3819%40yahoo.com>>
> >> To: Homebrew_PCB<homebrew_pcbs@yahoogroups.com 
> <mailto:homebrew_pcbs%40yahoogroups.com>>
> >> Sent: Sat, March 5, 2011 4:47:21 PM
> >> Subject: [Homebrew_PCBs] Hydrogen peroxide mixing
> >>
> >>
> >> I checked with the beauty shop in town ..
> >> they have 10 , 20 , 30 % peroxide.
> >>
> >> I can get the 10 .. I have several bottles of 3%.
> >>
> >> Can I mix equal amounts of say, 10% and 3%
> >> and end up with , 6.5% ? after starting those
> >> you tube video lectures on chemistry, I guess
> >> it might not be the case .. though it is the same
> >> chemical in this case.
> >>
> >> Randy - N2CUA
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> [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
> >>
> >>
> >>
> >
> >
> > ------------------------------------
> >
> > 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]