An ink jet composition and method of printing on plain paper are provided wherein the composition comprises a colloidal solution of a nonaqueous solvent (e.g. selected glycol ethers) and a disperse phase comprising a resin (e.g. a selected ethylene-vinyl acetate copolymer) which is soluble in the solvent at room temperature and a dyestuff which is soluble in the resin at room temperature but substantially insoluble in the solvent at room temperature. The ink composition is fluid and may have a very low viscosity at room temperature.

A method of operating a pulsed droplet deposition apparatus for ejecting a liquid droplet from a nozzle supplied by a liquid retaining chamber comprises applying a first energy pulse to the liquid in the chamber of sufficient energy to effect expulsion of a droplet from the nozzle and thereafter applying a further energy pulse to the liquid in the chamber to insure that the meniscus of the body of liquid to which the droplet is attached is convex in the direction of motion of the droplet at the time of detachment of the droplet, so as to propel the droplet along the axis of the nozzle. The second pulse has an energy content which is insufficient to alone effect droplet ejection.