Homebrew PCBs

On 19/03/12 12:18, Leon Heller wrote:
> On 19/03/2012 00:51, Leon Heller wrote:
>
>>   >  And I have a nice big bottle of dark green ferric chloride (isn't that
>>   >  stuff supposed to be brown?) which is taking 40 odd minutes to etch and
>>   >  is full of floating crud... time to dump it and mix a fresh batch, I
>>   >  reckon...
>
>
> If it's dark green, it's probably exhausted.

If it's dark green, it will etch perfectly well using a different chemistry if 
you use bubble agitation, and add a bit of hydrochloric acid from the hardware 
shop every few weeks.

I get full etch in 10-15mins at room temperature like that.