While rooting around in the darkroom I came across 2 long buried unopened packages of 16x20 Ilford paper. One was Multigrade III RC Glossy from France apparently circa 1991 and the other was UK Ilfospeed RC Pearl apparently circa 1989. Don't ask - larger things have gotten lost in there for longer periods! I thought what the heck, I'll try it. The bottom line was both produced a nice image. The contrast seems to have held up just fine but the Ilfospeed was 3 stops slower than the MG III. The interesting thing was the unexposed parts of the MG III were fogged to a light gray, but on the Ilfospeed they were snow white. I also found a package of Oriental Seagull RC of similar vintage but it was fogged to a medium gray. So Simon, how did you keep the Ilfospeed from fogging?