Homebrew PCBs

Robin Whittle wrote:
> This means it will creep
> (become thinner) if pressed unevenly.
>   
Yes, I though that the 5mm core, and rolling it up gently "looked ok".  
But I think it must have been too small  a diameter to be stored that 
way for a period of time, my feeling is that it needs to be in a fairly 
"natural" curl.


> that side.  Pulling the hard protective film off the copper before
> exposure will make the film less sensitive or totally insensitive to light.
>   
Actually my experience, if you do happen to pull off the top layer 
before exposure, it still exposes fine.  I imagine there is a time 
factor, not an instant thing.