An iconograph is a wonderful device that allows you to make “instantaneous paintings”. In fact, an imp with brushes, pencils and a good eye for colours is put in a box, and when you push the button, you open a little window on the box and the imp draws really fast what it sees through the opening. Salamanders are used when more light is necessary for the imp to paint a good picture. All but the cheapest of today’s iconographs can paint in colour.
Discworld