Drop on Demand. An inkjet technology describing ink ejected from an orifice drop by drop as it is required to form the image. There are two technologies Thermal Bubble Jet and Piezo-electric (q.v.).
Drop on Demand. The term is generally used to indicate a valve jet type of printing process in which electromechanical valves open and ink is sprayed onto a substrate. On occasion, improperly used to designate impulse type of inkjet printing.
Drop on Demand. Drop on Demand is a term used to describe the most common type of inkjet printers. Ink is heated and moved into the inkjet nozzles in precise measurements as it is needed, thus saving ink from being wasted. This is a more efficient way to apply ink than the continuous ink jet, which is most often used for industrial applications.