Just an update on this...
On 27/05/13 04:54, James wrote:
> I've now undone them all and put them flat between some card and a
> heavy thing in a warm place to see if there's any hope of resurrection
> for my personal usage, but I doubt it somehow.
This does actually seem to have helped, there is less wrinklyness in the
resist layer and I just successfully used a sheet with just a couple of
touchups which perhaps partly was because I was too lazy to break out
the laminator and just used a clothes iron to apply it to the 7x10cm
board, and may have had the developer a bit strong too (my measuring
style is "eh, that's probably about right").
But anyway, seems to be salvaged good enough for my personal usage, at
least that sheet was.