Homebrew_PCBs

On 02/12/12 08:16, bruce_fleming wrote:

> Hi all. I am new to this forum and am working on etching. The ferric chloride
> has been tried a few times. While searching for better ways to etch using
> ferric chloride I came across an Instructables on how to etch with muriatic
> acid so you do not have throw out your solution when saturated with copper.
>
> When I tried the Cupric Chloride the I made sure the area was well ventilated
> but I believe the cold slowed down the etching process so much that the
> traces also were partially destroyed.
>
> Has anybody found a fume hood that will handle cupric chloride? Etching
> outside or with a window open is not a good option in the winter.

You only need less than 5% HCl acid in the etchant. There should be minimal fumes.