Plain paper ink for drop-on-demand printing

摘要

There is described an aqueous ink of the type useful for drop- on- demand printers, that is, comprising more than 40 weight % humectant and a compatible dye. The ink is improved by the addition of from about 0. 5 to about 10 weight % of a non-ionic, acetylenic diol surfactant or a dioctyl sulfosuccinate surfactant, effective to provide high quality image properties when printed on plain paper. Without the surfactant, such high quality image is not achieved on the plain paper.