Thanks Trevor. The article on unblinkingeye says that 24 - 48 hours is enough to cause the paper to go bad and this has been what I have gotten as experiences by friends. There must be something that goes into making a "better" POP.

One thing is that a POP is made with high silver wrt to salt and this causes fog. Published formulas are unwashed, but Ilford mentions that the Kentmere POP must be washed before coating. So, I wonder......

PE