Well it couldn't have gone worse, the pot lost only a few PSI over night so when i came to take the castings out this morning imagine my surprise when they were still wet ...
So the casting i did the other week was nothing to do with the out of date PR as this mix was exactly the same... 
I also made a couple of castings for stoppers and these also hadn't gone off ... Now my thoughts have gone to what i am using for the additives as looking at them after i have taken them out of the pot and emptied the tubes the colours have come together all as one? I am using water based dyes, so tonight i have made one up in a tub using powders?
Lets see what happens with this, also i have used the old PR ...
The mix after it was removed from the pressure pot.

The water based dyes that was used for the casting.
