Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "Adam Seychell" <a_seychell@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, March 02, 2005 9:37 AM
Subject: Re: [Homebrew_PCBs] CuCl


>
> Naveed Alam wrote:
>> I bought a copper board. The shop-keeper also gave
>> CuCl but that is in the solid form. Can anyone tell me
>> about the proportions of water and this solid used to
>> prepare solution for etching. Can I also use some
>> other chemical to improve the etching process or make
>> it faster. It's black in colour. Is it OK?
>
> Ask the the shop keeper. The molecular formula for CuCl is Cu2Cl2, and
> is called cuprous chloride or copper(I) chloride, its a white powder,
> unstable in water and oxygen and even decomposes in light. How do you
> know its CuCl ?

If it's black, it is probably anhydrous ferric chloride. I used to buy it
like that, many years ago.

Leon
--
Leon Heller, G1HSM
http://www.geocities.com/leon_heller



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