Disclosed are opaque ink jet ink compositions and a method of printing
that produce messages having a good contrast on darkly colored
substrates, particularly darkly colored glass substrates, and that do not
smear or degrade when exposed to moisture and/or hot and cold humid
conditions, or when exposed to ice water or water under sterilizing
conditions. The ink jet ink compositions comprise one or more organic
solvents, one or more white pigments, one or more hydrophobic conductive
agents, and one or more binder resins. In an embodiment of the ink jet
ink composition, at least one binder resin comprises an acrylic or
styrene acrylic resin. In another embodiment, the ink jet ink composition
is free of polyamines. The ink jet ink composition may also include a
glass adhesion promoter.