Inkjet printing technology is becoming an increasingly attractive alternative for the distribution and patterning of materials for a wide variety of applications. This study aims to investigate the fluid droplet formation process of a piezoelectric inkjet device initiated by a voltage pulse. The effects of ink physical properties such as viscosity and surface tension on drop formation during the process are presented for fluids such as inkjet inks and ethylene glycol under various operating conditions on a nozzle measuring 30μ in diameter.