This report contains a study of ink mileage, show through and other mechanisms that are important in the study of substrate printability. These mechanisms have an impact on how ink will react on paper. To develop a substrate that provides good ink mileage and less show through requires a closer study of substrate characteristics. Substrates with different characteristics have been tested by a technique developed for this project called modified ink mileage. Ink mileage is a method to determine how much ink that is required for a certain target density. Further tests on the same substrates have been done including print through and surface roughness measurements.