Homebrew PCBs

You don't spray the resist on the still hot board from the cool oven and 
the very hot summer sun?
(nice to tell me that while here i freeze off my ass if i go outside. ;-) )


Are the bubbles lifted off by gas pressure (inflated bubbles)
or are they just spots where there is no adhesion of the resist.


Don't the bubbles (the small ones) show up when developing?

how are the temperatures of etchant/developer?

i have no experience with spray on resist, maybe the manufacturer knows the 
problem?

Stefan
(On the cold side of the planet)

On Sun, 28 Dec 2003 08:47:51 +1000 (EST), Scott Gordon <scottG@...> 
wrote:

> Hi,
>
> I'm trying to print my first ever PCBs, but I'm having some problems with
> the photoresist producing small bubbles (or patches lacking in
> photoresist) which are about 2 mm (0.1") wide.
>