Specific dye set for thermal ink-jet printing

Claim 2

A dye set for use with thermal ink-jet printers having at least 300 dpi print capability consisting essentially of Direct Yellow 86, Acid Red 52, and Acid Blue 9.

Claim 3

The dye set of claim 1 wherein Direct Yellow 86 dye molecules are associated with tetramethylammonium cations.

Claim 4

The dye set of claim 1 wherein Acid Red 52 dye molecules are associated with lithium cations.

Claim 5

A set of inks containing yellow, magenta, and cyan dyes for thermal ink-jet printers having at least 300 dpi print capability, said yellow ink having the formula ______________________________________ Direct Yellow 86 about 0.5 to 5 wt % diethylene glycol about 30 to 60 wt % water balance, ______________________________________ said magenta ink having the formula ______________________________________ Acid Red 52 about 1 to 5 wt % diethylene glycol about 30 to 60 wt % water balance, and ______________________________________ said cyan ink having the formula ______________________________________ Acid Blue 9 about 1 to 5 wt % diethylene glycol about 30 to 60 wt % water balance. ______________________________________

Claim 6

A set of inks containing yellow, magenta, and cyan dyes for thermal ink-jet printers having at least 300 dpi print capability, said yellow ink having the formula ______________________________________ Direct Yellow 86 about 0.5 to 5 wt % diethylene glycol about 30 to 60 wt % water balance, ______________________________________ said magenta ink having the formula ______________________________________ Acid Red 52 about 1 to 5 wt % diethylene glycol about 30 to 60 wt % water balance, and ______________________________________ said cyan ink having the formula ______________________________________ Acid Blue 9 about 1 to 5 wt % diethylene glycol about 30 to 60 wt % water balance. ______________________________________

Claim 7

The set of inks of claim 4, said yellow ink having the formula ______________________________________ Direct Yellow 86-TMA about 4 wt % diethylene glycol about 60 wt % water balance, said magenta ink having the formula Acid Red 52-Li about 4 wt % diethylene glycol about 60 wt % water balance, and said cyan ink having the formula Acid Blue 9-Na about 3 wt % diethylene glycol about 60 wt % water balance, ______________________________________ where TMA indicates the tetramethylammonium cation associated therewith, Li indicates the lithium cation associated therewith, and Na indicates the sodium cation associated therewith.