Disclosed is an ink-jet composition including an organic carrier that is solid at 25.degree. C. and liquid at the operating temperature of an ink-jet nozzle and a driver having a critical pressure greater than 10 atmospheres, the carrier and driver being miscible in liquid phase. The ink-jet composition is characterized by a viscosity of less than 15 centipoise at 90.degree. C. and a surface tension of between about 20 to about 25 dynes per centimeter at 90.degree. C. The ink-jet compositions disclosed herein are particularly useful in thermal ink-jet printing using thermally induced vapor bubbles to eject ink droplets from the printer and onto a substrate.