Abstract: The present invention provides a fast drying jet ink composition comprising an organic solvent, a colorant, a polyamine, and an acidic resin. The acidic resin preferably has an acid number of from about 10 to about 250. Examples of suitable polyamines include dendrimers and aminoacrylates. The jet ink composition can be used to print on glass surfaces that have a condensation of moisture on them. The printed messages do not easily rub off after exposure to humid conditions. The messages printed on glass can be washed off by a caustic solution.

Abstract: The present invention provides a jet ink composition suitable for printing on substrates such as plastics messages having abrasion resistance, the composition comprising an organic solvent, a colorant, a cellulose nitrate resin, and a rosin resin. For example, the messages printed on untreated low density polyethylene and polypropylene substrates have improved rub resistance and scratch resistance. The present invention further provides a method for printing abrasion resistant messages on a surface comprising projecting a stream of droplets of the jet ink composition to the surface, controlling the direction of the stream so that the droplets are caused to form the desired printed messages, and allowing the messages to dry.