Homebrew PCBs

Hi,
I got some HCl at 32% and H2O2 at 33% concentrations from our chemistry 
supply shop.
How do I use these materials in order to etch?
Do i need a special container in order to etch?
Do i need an air system inside the tank?
(What are the quantities, and in what order should i mix everything - I 
dont know much about chemistry...)?
Any help will be woderful...
Thanks in advance - 
Liquias.

--- In Homebrew_PCBs@yahoogroups.com, "liquias" <liquias@...> wrote:
>
> Hi,
> I got some HCl at 32% and H2O2 at 33% concentrations from our chemistry 
> supply shop.
> How do I use these materials in order to etch?
> Do i need a special container in order to etch?
> Do i need an air system inside the tank?
> (What are the quantities, and in what order should i mix everything - I 
> dont know much about chemistry...)?
> Any help will be woderful...
> Thanks in advance - 
> Liquias.
>


http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/index.html

For 1 liter, 700cc distilled water, 270cc HCl and 30cc H202.
Keep your H202 in a very dark and cold place to minimize decomposition.
You can use the mixture until it gets very dark green. Storage is the same
as H202. With time, you will have to add some H202. To check it, just dip
your clean PCB to etch in the mixture for 1 sec. If there is enough H202,
the copper takes a dark brown colour and etching time at 40°C with a 35µm
copper is less than 5 minutes .

--- On Fri, 9/5/08, liquias <liquias@...> wrote:

From: liquias <liquias@...>
Subject: [Homebrew_PCBs] HCl H2O2 etch
To: Homebrew_PCBs@yahoogroups.com
Date: Friday, September 5, 2008, 10:24 PM










    
            Hi,

I got some HCl at 32% and H2O2 at 33% concentrations from our chemistry 

supply shop.

How do I use these materials in order to etch?

Do i need a special container in order to etch?

Do i need an air system inside the tank?

(What are the quantities, and in what order should i mix everything - I 

dont know much about chemistry... )?

Any help will be woderful...

Thanks in advance - 

Liquias.




      

    
    
	
	 
	
	








	


	
	


      

[Non-text portions of this message have been removed]

Forgot a few point.
You can use plastic container.
Air bubble improve etching time.
And always put HCl into water, not water into HCl. Dissociation of an acid into water is
exothermic (particularly with nitric and sulfuric acid, less with HCl). If you put water
in acid, water can get to the boiling point and can splash you.

--- On Fri, 9/5/08, liquias <liquias@...> wrote:

From: liquias <liquias@...>
Subject: [Homebrew_PCBs] HCl H2O2 etch
To: Homebrew_PCBs@yahoogroups.com
Date: Friday, September 5, 2008, 10:24 PM










    
            Hi,

I got some HCl at 32% and H2O2 at 33% concentrations from our chemistry 

supply shop.

How do I use these materials in order to etch?

Do i need a special container in order to etch?

Do i need an air system inside the tank?

(What are the quantities, and in what order should i mix everything - I 

dont know much about chemistry... )?

Any help will be woderful...

Thanks in advance - 

Liquias.




      

    
    
	
	 
	
	








	


	
	


      

[Non-text portions of this message have been removed]