Homebrew PCBs

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 ?

Adam