[sdiy] Etching PCBs with non-toxic chemicals

[Csaba Zvekan]

So , I basically add little pieces (sraps) of aluminum and let it sit there for a few days ? Do I still have a piece of metal in there after days? Or is it completely dissolved ?
And could the liquid afterwards theoretically dumped in my septic tank ? Or is it gonna cause other problems further down in the septic system ? Like killing all the fermentation ? 

Csaba


On 6 Mar 2011, at 23:00, Paul Perry wrote:

> You can add excess scrap aluminium to give non-toxic aluminium chloride
> and metallic copper. if my memory of chem classes 50 years ago is right..
> 
> paul perry Melbourne Australia
> 
> ----- Original Message ----- From: "Csaba Zvekan"
> 
>> Thanks Adam  and thanks David,
>> 
>> This is highly interesting stuff as I live quiet in a remote place and don't have access to the usual chemicals . How ever my question would be rather the reversal of the chemical . Meaning is there a easy neutralization method where I could safely put it back into the environment (disposal) . Perhaps thin it down and somehow separate the copper , natrium and the vinegar acid so I can feed to my plants as fertilizer ? Or is that process to complex ?
>> 
> 
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