I remember the practice of using photocopied textbooks during my undergrad. The place I am from, its quite common to use photocopies of textbooks because most books are very expensive. Besides, there were specific shops that used kerosene in the photocopiers (I don't know how it works though)and that reduced the cost of photocopying per page by almost a third or the original price. I remember distinctly that the photocopies you get by this method would carry a kerosene stink and sometimes the ink would fade over time.
"Besides, there were specific shops that used kerosene in the photocopiers (I don't know how it works though)and that reduced the cost of photocopying per page by almost a third or the original price."
Kerosene is/was subsidised in many places (e.g. India), I think because every needs to eat (and therefore everyone needs fuel for their stove.)
