Homebrew PCBs

Roland ... you seem to have difficulty reading an e-mail as written !!!
Jim KI6MZ

On 3/5/2011 10:52 PM, Roland F. Harriston 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.
> ***********************
>
>
> 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:
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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
>>>
>>>
>>>
>>>
>>>
>>
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> [Non-text portions of this message have been removed]
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> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
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>
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