Homebrew PCBs

On Wed, 07 Feb 2007 17:45:41 +0100, scc_11067 <mr_cross@...>  
wrote:

> Hi, I have found that inks don't hold up too against the muratic  
> acid/peroxide bath,
> (even sodium and ammonia persulfates)
> so i switched to ferric chloride
> and get really good results.
> I am currently using durabrite yellow with really good etch's
> Could use durabrite magenta, but the ink bunches up on the board
> if not dried instantly.
> The persulfates just lift the ink off the board.
> ( i printed and etched a sspcb that is smaller than a dime, just for  
> testing)
> Fecl works best for direct ink printing IMHO.


Interesting, i compared CuCl and FeCl, using a sample PCB just cut in half  
before etching, with MISPRO yellow, and could notice no significant  
difference between the two. My CuCl was very low molarity HCl though.

ST