IMPROVED WATERFAST THERMAL INK JET INK FORMATIONS
Original Publication Date: 1995-Apr-30
Included in the Prior Art Database: 2004-Apr-07
Xerox Disclosure Journal
Disclosed are thermal ink jet (TIJ) ink formulations which exhibit improved waterfastness properties and are suitable for use in high speed, low volume thermal ink jet printers. Formulations comprised of, for example, in weight percent, 73.68% dye stuff (e.g. ICI Pro Jet Black DB-1681, 10% sulfolane solvent (medical grade), 10% 2-pyrrolidone solvent, 1% triethanolamine, 0.05% polyethyleneoxide, 0.6% concentrated HC1, balance with deionized water, yielded waterfastness values from about 80 to 99 percent on a variety of standard bond papers, such as Courtland 4024 (84%) and Hammermill 3V (98%). Solid area density values measured were in the acceptable range of about 1.21 to about 1.34. The ink formulations easily satisfied kogation requirements.