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US 2003/0196570 A1Published application
Ink set for inkjet printers
AssigneeBenq Corporation
InventorsYu-Chang Shen, In-Shan Sir, Chia-Hsin Chien, Yun-I Liu, Yu-Ting Lin
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AssigneeBenq Corporation
InventorsYu-Chang Shen, In-Shan Sir, Chia-Hsin Chien, Yun-I Liu, Yu-Ting Lin
Estimating the term…
This present invention is an ink set for an inkjet printer. The ink set comprises a first ink and at least one second ink. The first ink comprises at least one first colorant, a first merchant, and at least one first non-ionic surfactant. The first merchant comprises aqueous. The at least one first non-ionic surfactant has a first HLB (Hydrophilic Lipophilic Balance) value. The at least one second ink comprises at least one second colorant, a second merchant, and at least one second non-ionic surfactant. The at least one second colorant provides corresponding color of the second ink. The second merchant comprises aqueous. The at least one second non-ionic surfactant has a second HLB value. The first HLB value is smaller than or equal to the second HLB value.
An ink set for an inkjet printer, comprising:
A printing method of reducing ink bleeding, comprising:
Dependencies are inferred from the claim text.
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Inkjet printing inks: ink-sets specially adapted for multi-colour inkjet printing
Coating compositions
Term end not estimated
1. Field of the Invention
The present invention relates to ink set for inkjet printers; in particular, the ink set comprising a deep color ink and a light color ink.
2. Description of the Prior Art
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a print-out diagram of the experimental result of the 1st embodiment according to the present invention.
FIG. 2 is a print-out diagram of the experimental result of the 2nd embodiment according to the present invention.
The present invention provides an ink set for inkjet printers. The ink set comprises a first ink and at least one second ink. The major composition of the black first ink in the ink set comprises a first media, at least one first colorant, and at least one first non-ionic surfactant. The first media comprises aqueous, organic solvent, humectant, polymer solvent, bactericide, or the combination of those mentioned. The concentration of the water is ranged from 50 wt % to 95 wt %. The preferred concentration range is 70 wt % to 90wt %. The ink set also comprises a water soluble solvent such as organic solvent and inorganic salt for enhancing the infiltration and dispersion of the ink.
The major components of the second ink comprise a second media, at least one second colorant, and at least one second non-ionic surfactant. The second media may be aqueous, organic solvent, humectant, polymer solvent, bactericide or any combination of those solvents. The concentration of the water is ranged from 50 wt % to 95 wt %. The preferred concentration range is from 70 wt % to 90 wt %. The ink also comprises a water soluble solvent like organic solvent and inorganic salt for enhancing the infiltration and dispersion of the ink.
If the print head exposes to the air for a long time, the ink in the print head is easy to evaporate and produce precipitants, resulting print head clogging and affecting printing quality. For slowing down the evaporation and preventing from clogging, the humectant is added into the ink. The humectant used in the present is the organic solvent with low volatility, such as ethylene glycol, polyethylene glycol, and glycerol. The concentration is below 20 wt %.