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@...> >> To: Homebrew_PCB<homebrew_pcbs@yahoogroups.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 > > > > >
Message
Re: [Homebrew_PCBs] Hydrogen peroxide mixing
2011-03-06 by Jim