I made the mistake today (and also once before last week) of toning a print in my darkroom with all my paper stored nearby. I afterward read several references to the fact that sulfur toners such as the sepia toner I was using, which smells like rotten eggs, can chemically fog paper. I'm mostly calm. At least on the surface. My girlfriend says I look "distracted." I have several packages of new paper that can not be easily replaced. Can anyone tell me if there is a simple test to look for chemical fogging? I did take two scraps, one from my metal paper safe and one from inside the lightproof bag inside a box, and place them in developer. I didn't see any fogging in the form it usually takes in my experience, cloudy gray. Anyone who can set my mind at ease before I stay up all night running tests on all my paper?