Re: [Homebrew_PCBs] Digest Number 262 - cupric chloride
2003-03-04 by Adam Seychell
I think you will be hard pressed finding a hardware store selling cupric chloride!
However with a little time you can make the damn stuff.
Get some hydrochloric acid (30%~35% wt HCl sold in hardware shops) and say 500g of copper wire or
copper scrap, preferable with a lot of surface area. Lay the copper on the bottom of a plastic tray
and then pour in the acid so you have lots of wetted copper exposed to the atmosphere, you can
dilute it down to 50 or 25% of original strength so if doesn't fume so much. cover the tray with a
cloth to stop leaves, insect, et from blowing in. In about 2 or 3 days most of the copper will of
oxidized into green cupric chloride. At this point you can remove the excess copper or you can put
in more acid and leve it a nother day to oxidize the remaining copper. I found its best to have the
copper sticking out of the acid so it has some direclt exposure to the air. Let it evaporate
completely for a green crusty power. Now you have your cupric chloride.
Believe it or not, copper sulfate is sometimes made exactly the same way, except of course using
sulfuric acid.
Adam
JanRwl@... wrote:
However with a little time you can make the damn stuff.
Get some hydrochloric acid (30%~35% wt HCl sold in hardware shops) and say 500g of copper wire or
copper scrap, preferable with a lot of surface area. Lay the copper on the bottom of a plastic tray
and then pour in the acid so you have lots of wetted copper exposed to the atmosphere, you can
dilute it down to 50 or 25% of original strength so if doesn't fume so much. cover the tray with a
cloth to stop leaves, insect, et from blowing in. In about 2 or 3 days most of the copper will of
oxidized into green cupric chloride. At this point you can remove the excess copper or you can put
in more acid and leve it a nother day to oxidize the remaining copper. I found its best to have the
copper sticking out of the acid so it has some direclt exposure to the air. Let it evaporate
completely for a green crusty power. Now you have your cupric chloride.
Believe it or not, copper sulfate is sometimes made exactly the same way, except of course using
sulfuric acid.
Adam
JanRwl@... wrote:
> In a message dated 3/3/2003 8:49:31 PM Central Standard Time,
> picstuff@... writes:
>
>
>>Plumming?
>>What else is CC used for?
>>
>>
>
>
> GOOD question! I have ONLY seen it in H.S. chemistry class! Someone TELL
> us!
>
>
> [Non-text portions of this message have been removed]
>
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