Liquid toners comprising organic pigments and methods

A liquid electrographic toner composition comprising:

• a) a liquid carrier having a Kauri-Butanol number less than about 30 mL;
• and
• b) a plurality of toner particles dispersed in the liquid carrier, wherein the toner particles comprise
• i) a polymeric binder;
• and
• ii) an organic pigment comprising a ionic dye component and a second ionic dye component complexed to form ionically complexed compounds that together in a colorant composition exhibit a predetermined color, the ionically complexed compounds each having a molecular weight of less than about 5000 Daltons and being substantially free of metals that are not covalently bonded to the ionically complexed compounds.

A method of preparing a toner comprising:

• a) preparing a pigment of a predetermined color, comprising
• i) identifying a first ionic dye component having an apparent color characteristic;
• ii) identifying a second ionic dye component having a known color characteristic;
• iii) determining the ratio of the first ionic dye component and the second ionic dye component required to obtain the predetermined color desired for the pigment;
• and
• iv) complexing the first ionic dye component and the second ionic dye component to form an ionically complexed colorant compound exhibiting the predetermined color, the colorant compound having a molecular weight of less than about 5000 Daltons and being substantially free of metals that are not covalently bonded to the colorant compound;
• b) providing a binder;
• c) providing a carrier liquid;
• and
• d) combining the binder, pigment and carrier liquid in a manner to form a liquid toner composition.

A method of preparing a toner comprising:

• a) preparing a pigment of a predetermined color, comprising
• i) identifying a first ionic dye component having an apparent color characteristic;
• ii) identifying a second ionic dye component having a known color characteristic;
• iii) determining the ratio of the first ionic dye component and the second ionic dye component required to obtain the predetermined color desired for the pigment;
• and
• iv) complexing the first ionic dye component and the second ionic dye component to form ionically complexed compounds that together in a colorant composition exhibit a predetermined color, the ionically complexed compounds each having a molecular weight of less than about 5000 Daltons and being substantially free of metals that are not covalently bonded to the colorant compound;
• b) providing a binder;
• c) providing a carrier liquid;
• and
• d) combining the binder, pigment and carrier liquid in a manner to form a liquid toner composition.