Ink composition for inkjet recording and inkjet recording process
AssigneeHitachi Printing Solutions, Ltd.
InventorsAkemi Ouchi, Tsutomu Maekawa, Atsushi Kakuta
Life of this patent
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Abstract
An ink composition for use in an on-demand inkjet printer capable of printing on plain paper at a recording rate of 10 ips or higher, which ink composition comprises at least a pigment and non-pigment components including at least water and a thickening agent and shows a weight loss ratio at 25° C. and 60 RH % for 30 minutes of 5 to 25% based on the total weight of the ink. Also disclosed is an on-demand inkjet recording process using the ink composition.
Claims18
An ink composition for use in an on-demand inkjet printer capable of printing on plain paper at a recording rate of 10 ips or higher, which ink composition comprises at least a pigment and non-pigment components including at least water and a thickening agent and shows a weight loss ratio at 25° C. and 60 RH (relative humidity) % for 30 minutes of 5 to 25% based on the total weight of the ink.
An ink composition for use in an on-demand inkjet printer capable of printing on plain paper at a recording rate of 10 ips or higher, said ink composition, comprising:
- at least a pigment and non-pigment components, said non-pigment components including at least water and a thickening agent,
- wherein said ink composition shows a weight loss ratio, based on a total initial weight of said ink composition, of 5 to 25%, for 30 minutes at 25° C. and 60% RH (relative humidity) and,
- wherein said non-pigment components comprise:
- at least one of 7.5 to 40% by weight of a polyethylene glycol having an average molecular weight of 600 to 6,000 and 1 to 10% by weight of a polyethylene glycol having an average molecular weight of 20,000 to 70,000 as a thickening agent;
- 0 to 30% by weight of at least one of an ethylene glycol ether and a propylene glycol ether;
- and
- 0 to 30% by weight of glycerin.
Dependencies are inferred from the claim text.