As the name implies, in Continuous Ink-Jet systems a continuous stream of ink droplets is ejected from nozzle on to the substrate. After leaving the nozzle, the drops are electically charged by an amount that depends on the image to be printed. The drops then pass through an electric field to cause then to deflect. There are two ways of deflecting the drops in piezoelectric- driven Continuous Ink Jet. In the binary deflection method droplets are directed to a single pixel location in the medium or to the recirculation gutter. In the multiple deflection method the deflection is variable so the drops can address several pixels.