As a teacher I have changed my classrooms into a camera obscura and a darkroom in the past. My present classroom has two flourescent lights that are on permanently so blacking the room out is not an option, unless I cover the lights with thick black plastic, which I have already gotten in trouble for this year, or remove the bulbs, which I have already gotten in trouble for. For some reason I am allowed to cover them with butcher paper so I was thinking that, maybe I could cover them with red butcher paper and just use them as safelights. This would allow the room to be dark enough to turn into a camera obscura, and be used as a darkroom. Would the light filtering through the red butcher paper work as a safelight, or would it fog the paper as we load our pinhole cameras then develope them?