An electrostatic plotter charges portions of the paper negatively. Older plotters did this by running a line of electrodes across the paper, although newer printers generally use laser, much like any other laser printer. The toner is charged positively, so that is is attracted to the desired areas, where it is then fused.<ref>http://www.pcmag.com/encyclopedia/term/42512/electrostatic-plotter</ref><ref>http://link.springer.com/referenceworkentry/10.1007/1-4020-0613-6_6038</ref><ref>http://www.globalspec.com/learnmore/industrial_computers_boards/computer_peripherals/computer_printers_plotters</ref>