Homebrew PCBs

On Wed, 2009-06-03 at 12:48 -0400, DJ Delorie wrote:

> Looks like you got the exposure just right. Are you using some type
> of vacuum hold-down? I found I had to do something about that because
> the weight of the glass was insufficient to hold the film tight
> against the board.
> 

If you still didn't use/tried, maybe facing the paper side with ink down
to the dry film and placing the uv source 1 meter apart could be an easy
test. To use vacuum, use one piece of glass and other off some flexible
transparent (hard) plastic, maybe the mylar from the dry film.
>