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:
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>>
>>
>>
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>
>