Q: You know, you click "print" and then go to the office printer and it tells you it is "warming up." What gets warmed up, and why?
A: Laser printers use a "toner" powder to make the image, this is laid onto the paper and passed through the 2 hot rollers in teh "FUSER". This actually melts the toner to the paper. If the printer has been idle a while, the heaters have been off and the rollers cool down, so it need to turnon the heat for a bit to warm them up again, then once at the right temperature (usually 150C-250C depending on machine) it will printer. If the fuser is NOT warm enough the toner will simply rub off the page.