Homebrew PCBs

On 09/08/13 23:35, Mario Mikulandra wrote:
>
> My intent wasn't to discourage you. All photosensitive dry films have a shelf
> life approx. 6 months at the room temperature. The best thing to do is
> complete your PCB design first, etch, drill and then order the dry film
> soldermask. ;)

I wouldn't take recommended shelf life as gospel; i'm still using a roll of 
stuff that's way over 5 years old. Precoated board i had with photoresist became 
unuseable after ~3 years however.