Electrostatic printing
AssigneeHewlett-Packard Indigo B.V.
InventorsGil Bar-Haim, Amir Ofir, Ilanit Mor, Alina Grishman, Albert Teishev
Life of this patent
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Abstract
Described herein is a method for electrostatic printing including: (i) providing an ink composition having: a hydrocarbon carrier liquid and particles includes a resin and a colorant, and wherein the ink composition contains less than 0.3 mg of charge director per g of solids in the ink composition; (ii) adding a charge director to the ink composition, such that the total amount of charge director in the ink composition is at least 0.6 mg per g of solids in the ink composition, and, (iii) within a predetermined time of adding the charge director, printing the ink onto a print medium in an electrostatic printing process, wherein the predetermined time is 90 minutes or less.
Claims14
A method for electrostatic printing comprising:
- (i) providing an ink composition comprising:
- a hydrocarbon carrier liquid and particles comprising a resin and a colorant, and wherein the ink composition contains less than 0.3 mg of charge director per g of solids in the ink composition;
- (ii) adding a charge director to the ink composition, such that the total amount of charge director in the ink composition is at least 0.6 mg per g of solids in the ink composition, and,
- (iii) within a predetermined time of adding the charge director, printing the ink onto a print medium in an electrostatic printing process, wherein the predetermined time is 90 minutes or less.
Dependencies are inferred from the claim text.