Homebrew PCBs

I have bought photo-resist-board at Reichelt.de  Its Bungard. and on the boards is a label with 16-2-2013 
witch I guess means, it is perfect nearly one year ahead. 
alex

--- In Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@...> wrote:
>
> On 14/04/2011 19:11, Tom Biery wrote:
> > I have recently used some positive resist boards from eBay and am expereinceing
> > exposure times of up to twice as long as the times it is taking for the positive
> > resist boards bought from Circuit Specialists.
> >
> >
> > Is this because they are old or defective?
> >
> > I have a UV exposure box and the eBay boards take 150 seconds and the new
> > Circuit Specialists boards only take 80 seconds?
> 
> I've found that resist-coated boards I've bought sometimes aren't much 
> use when they are more than six months old.
> 
> Leon
> -- 
> Leon Heller
> G1HSM
>