Homebrew PCBs

I had not thought of it before, but Sulfuric acid will attack cooper, no? 
Copper sulfate?

----- Original Message ----- 
From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Monday, December 11, 2006 12:57 PM
Subject: Re: [Homebrew_PCBs] Sulfuric acid should remove TT paper.


> On Mon, 11 Dec 2006 15:59:18 +0100, Dan Pickard <dlpwebmail@...>
> wrote:
>
>> Hello all,
>>   First of all I know that to make wood alcohol the wood pulp slurry
>> needs sulfuric acid added to break down the wood cellulose.  This helps
>> the yeast access the sugars inside. Without sulfuric acid the production
>> of wood alcohol would be very difficult.  I believe this could help in
>> the manufacture of TT circuit boards.  If you soaked your TT circuit
>> board in sulfuric acid it should turn the paper into a gelatin like mush
>> and should just fall off.  I tried this in the shop last night but only
>> had a small amount of watered down old battery acid.   The watered down
>> acid did start to turn the paper clear and gel looking after 1/2 hour in
>> a 32F ambient shop. I was freezing so I tried to hurry-up by pulling the
>> paper off. You already know the results. I'll get some fresh new acid
>> this week and try it again. Maybe someone else has tried this too.
>>   Dan
>
>
> Hmm, i can see where you are going with this, but is it really worth the
> effort to mess with sulphuric acid when water and some rubbing also works
> well, and fast too?
>
> ST
>
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