Colour printing costs 35p per sheet of A4 (compared to 5p for black and white). We deliberately make it slightly more difficult to print to to avoid countless students complaining that they have accidentally used up all their print credit from printing to the colour printer by mistake. Sometimes we do get students ask how to set up the colour printer to be able to print to.
Customer: Hi, I've just tried to print to the colour printer, but I'm not sure if I've done it right
Me: Ok, what have you done?
Customer: *explains step-by-step what she's done*
Me: It sounds like you've done it right...hasn't your work come out of the printer?
Customer: Oh, shall I check it?