Ink compositions having improved latency
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 30, 2000
Grant Date -
N/A
app pub date -
Jun 14, 1996
filing date -
Jun 14, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An ink composition is disclosed including a liquid vehicle and an ionically charged organic pigment and a hydroxylated hydrocarbon humectant having at least two hydroxyl groups. The ionically charged pigment may be black, blue, brown, cyan, green, violet, magenta, red, orange, yellow, mixtures thereof, and the like. The ionically charged pigment, due to the nature of its surface charge, is readily-dispersed in the liquid vehicle of the ink composition without the addition of a surfactant or other dispersing aid or additive. In a preferred embodiment, the ionically charged pigment has sufficient ionizable groups to maintain the colloidal stability of the pigment in the ink composition. Further disclosed is a method for generating printed images which include incorporating into a printing apparatus the ink compositions described above and generating an image onto a substrate.
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