Homebrew PCBs

Stefan Trethan wrote:
> i am not too convinced that the "darkness" is most important to be 
> measured...
> 
> do you really have problems with the whole printout being not dark enough?

It makes exposure time less critical if the ink blocks better.

> i would be more interested in the quality of the printed tracks (the edges) 
> and the equal distribution of the opaqe ink (if it is good too at the 
> borders...)
> 
> pinholes are interesting too...
> 
> and i don't think one can get a smooth surface with acetone treatment.. but 
> try....

The idea is to *not* have a smooth surface.

> maybe better then are inks based on solvents themselves...

They'd probably clog less and dry quicker.