Ed,

I think THAT was the case ....unbelievable, I have never thought about it.
All my previous mixings were done in servo box top ( plastic ) and for the first time I have
tried to use the medicine cap because it has a nice size and you can mix it better ( smaller area versus hight).
It IS waxed cardboard or waxed paper the cap is made of.
Now , the most interesting part, would wax kind of mix with the epoxy and hardener to stop it
from curing?
I am almost positive you found the cause.... unbelievable, I would never, ever think of it.
I was so surprised because I have mixed epoxy hundreds of times before but never had that problem before.
Will remember it from now on......*smile.

Thank you very much.

ARB