Plotter paper is a special kind of paper that’s only used on plotters, which is a type of printer that’s used to print vector-type graphics. While its operation is similar to a standard printer, it works a little differently. A plotter has a special pen that moves across the paper, which is different than ordinary printer paper. Inkjet vellum plotter paper is the preferred choice for printing a large numbers of blueprints, because the print quality is much higher. And they can come in a variety of sizes.