Back in the day, I worked at a print shop as a press operator for AB-Dick 360CD printing presses.

We'd clean the ink off the rollers between separations with benzene. We didn't have any special ventilation (or even use gloves, for that matter). The first few times you did it, you'd get quite a headrush.

It's 40 years on, now, and I haven't yet experienced any health effects that I can directly link to that exposure. I'm sure I'm dumber than I would have been had I avoided the exposure, although I also grew up in the era of leaded gasoline. Based on what I've read, I'm more likely to experience Parkinson's, anemia, and various cancers in the future.