Homebrew PCBs

On 15/04/2011 18:14, alex4459jopiklal44 wrote:
> 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.


The problem might be caused by light getting through the back of the 
board, if they are not stored in light-proof packaging.

Leon
-- 
Leon Heller
G1HSM