Quote Originally Posted by johnus View Post
Question/idea. Is the condensation actually caused by H2O vapor or by other chemical compounds in the ink that may evaporate at a lower temperature???
It could (and probably should) contain any liquid component of the ink that evaporates at room temperature. I doubt it is predominately anything but water, however. I'll bet you can fill a demonstrator with distilled water and observe the phenomenon. Sounds like an experiment.