Hi! I have had a darkroom for over six years, and it used to be in a very poorly ventilated room, but I was pretty young and didn't care enough. Now I have a larger room with more air, but no ventilation whatsoever. Since I mix both liquids and powders there, I've been concerned with health issues lately, as I get somewhat dizzy after an hour or so if the chemicals are fresh. I used to use a simple face mask from the pharmacy, the kind you'd use for cleaning your bathroom, but I've been looking for something more advanced. Recently, my boyfriend bought me a respirator, but I'm wondering if it's the right kind. It's a 3M respirator with cartridges against organic vapor and acid gas and a p100 particle filter. From what I have read organic vapor and particle filters is what I should be looking for, but I'm not quite sure. Can anyone confirm I have the right stuff or recommend a better alternative?