Homebrew PCBs

On 15 Mar 2010, at 22:43, DJ Delorie wrote:

> An unrelated thing you might think about is how you're holding the film 
> against the PCB.  I only get good results if I (1) print the film in 
> reverse, so that the inked side is against the PCB, and (2) use a vacuum 
> to hold the film tight against the pcb (gravity won't work).

My (commercial) exposure box has a lid with foam in it to press the whole lot evenly onto the glass surface.

Pete Harrison