Abstract
We have developed a method to improve the printing quality of an electrostatic ink-jet printer. In developing this method, first, we measured the path of a deflected droplet, as well as its velocity and air drag, in order to determine the influence of the aerodynamic force on the drop-displacement error. Then we observed the change of the path caused by the air drag in order to determine the influence of the wake generated by the preceding droplet. Understanding of these influences enable us to reduce the drop-placement error by increasing the strength of the electric field and by shortening droplet's flying path.
