Anti-coalescent ink composition and method for making the same.

摘要

An improved ink composition having an additive therein for reducing the surface tension of the composition and increasing the drop mass per firing. Reduced surface tension and increased drop mass per firing enable the production of graphic images having enhanced clarity and contrast while avoiding problems such as bubble adhesion/longevity and ink mottling/coalescence. The additive basically consists of at least one polyether polyol. The additive is usable in a wide variety of ink compositions. In a preferred embodiment, ink compositions using the additive will include about 0.001 - 1.0% by weight additive (0.0075% = optimum). The resulting ink formulations are capable of printing high resolution graphic images while avoiding the problems described above.