Abstract: A method of sealing a nozzle. First, a device comprising a chamber, a nozzle, and a nozzle plate is provided, wherein the nozzle plate is installed on the chamber and the nozzle passes through the nozzle plate and connects the chamber. The chamber is then filled with ink. Residual ink on the nozzle plate is then removed by water. After that the nozzle plate is dried, a solution is then coated on the nozzle plate, wherein the solution has higher surface tension than the ink and has smaller contact angle with the nozzle plate than the water. Next, the nozzle plate is dried. Finally, a flexible material is bonded on the nozzle plate to seal the nozzle.

Abstract: A method of sealing a nozzle. First, a device comprising a chamber, a nozzle, and a nozzle plate is provided, wherein the nozzle plate is installed on the chamber and the nozzle passes through the nozzle plate and connects the chamber. The chamber is then filled with ink. Residual ink on the nozzle plate is then removed by water. After that the nozzle plate is dried, a solution is then coated on the nozzle plate, wherein the solution has higher surface tension than the ink and has smaller contact angle with the nozzle plate than the water. Next, the nozzle plate is dried. Finally, a flexible material is bonded on the nozzle plate to seal the nozzle.

Abstract: An ink composition for inkjet printing and ink-jet printing method employing the same. The ink composition comprises a colorant, an aqueous solution medium, and a non-ionic surfactant with HLB not more than 10.6. Compared with an ink including a non-ionic surfactant with HLB of more than 10.6, the ink composition of the present invention has improved smear resistance, thus enhancing inkjet printing quality.

Abstract: An ink set for an inkjet printer comprises a first ink and at least one second ink. The first ink comprises at least one first colorant, a first media, and at least one first non-ionic surfactant. The first media comprises water. 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 media, and at least one second non-ionic surfactant. The at least one second colorant provides corresponding color of the second ink. The second media comprises water. 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.

Abstract: A highly bleed-alleviating ink composition including at least one colorant, an aqueous media, a linear diol, and a humectant. The main feature of the ink composition is the addition of the linear diol. When the ink composition is applied in ink-jet printing, not only is the bleeding between black ink and color ink alleviated, but also water-fastness and printing quality are improved.

Abstract: An ink composition containing a micro-encapsulated UV absorber. The ink composition includes a micro-encapsulated UV absorber, a dispersant, an emulsifer, at least one colorant, and a medium. The present invention adds a micro-encapsulated UV absorber to inkjet ink or screen printing ink. The micro-encapsulated UV absorber is suitable for either a water-based system or solvent-based system. The micro-encapsulated UV absorber increases the light-fastness and maintains longer-term light resistance because the UV absorber is gradually released from the microcapsule. The ink composition of the present invention provides excellent printing quality when used in inkjet or screen printing.

Abstract: An invisible ink composition and a method to ensure document confidentiality. The invisible ink composition includes a carrier as a solvent; and at least one leuco dye evenly dispersing in the carrier. The invisible ink becomes visible while the leuco dye is combined with a weak acidic developer.

Abstract: An ink-jet ink comprising a glycol compound with grafts, an aqueous solution, a pigment as a colorant, a surfactant, and a humectant is disclosed. The ink-jet ink has low surface tension and high drying speed. Moreover, the ink-jet ink has high adhesive force between the ink drops and the printing medium, and thus provides the printing medium with high water fastness.

Abstract: A fragrant ink-jet ink including: a fragrant agent, a surfactant, wherein a boiling point of the surfactant is above 78° C. and a Hydrophilic Lipophilic Balance (HLB) of the surfactant is in a range of about 5 to 16, a colorant, and a solvent. The fragrant agent can be a natural fragrant agent, a synthetic fragrant agent or a mixture thereof. The amount of the fragrant agent is about 0.01 wt % to 10.0 wt %.

Abstract: A composition of a fragrant ink, at least comprising a microcapsule compound, a colorant, a media, a dispersing agent, and an emulsifier, and a preparation method thereof are disclosed. The microcapsule compound encapsulates a fragrant agent for providing the fragrant ink with fragrance. The colorant provides the fragrant ink with at least one color. The media is used as a solvent. The dispersing agent is for evenly dispersing the microcapsule compound in the media. The emulsifier emulsifies the fragrant agent released from the microcapsule compound and evenly disperses the fragrant agent in the media.

Abstract: An inkjet ink of multicolor dye set with high light-fastness and high water-fastness includes: a multicolor dye set, a surfactant, and an aqueous solvent. The multicolor dye set includes a cyan dye set, a magenta dye set, and a yellow dye set. The cyan dye set includes direct blue 199 dye, acid blue 9 dye, and direct blue 86 dye. The magenta dye set includes reactive red 180 dye, acid red 52 dye, and reactive red dye. The yellow dye set includes acid yellow 23 and direct yellow 86 dye. When the multicolor dye set of the invention is applied in ink-jet printing process, the high-quality printed image possesses great light-fastness and water-fastness high chroma, broad color gamut.

Abstract: A pigment-based black ink. The ink includes a carbon black pigment dispersions, macromolecular chromophores (MMCs), and an aqueous solution medium.

Abstract: A preparation method for biochips. The method comprises spraying a hydrophobic material onto a substrate by a micro injecting process to form a hydrophobic region thereon, wherein the hydrophobic region separates a plurality of partitions on the substrate, and immobilizing a probe on the partition by the micro injecting process.

Abstract: A water-soluble dye set used in thermal bubble color ink-jet printers. The dye set has high water-fastness and includes (a) Direct Blue 199 dye and Acid Blue 9 dye; (b) Reactive Red 180 dye, Acid Red 52 dye, and Direct Red 75 dye; and (c) Direct Yellow 132 dye and Acid Yellow 5 dye. The dye set of the present invention has improved heat stability and storage stability when used in thermal bubble ink-jet printers. In addition, the dye set has special viscosity, good surface tension, and high water resistance, greatly improving printing properties.

Abstract: 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.

Abstract: A pigment-based ink composition for inkjet printing. The ink composition includes at least one dispersive pigment, an aqueous solution medium, and a 2-pyrrolidone compound. The ink composition of the present invention effectively controls the line width of printed images, decreases feathering, and enhances printing quality when used in inkjet printing.

Abstract: An ink composition containing a micro-encapsulated UV absorber. The ink composition includes a micro-encapsulated UV absorber, a dispersant, an emulsifer, at least one colorant, and a medium. The present invention adds a micro-encapsulated UV absorber to inkjet ink or screen printing ink. The micro-encapsulated UV absorber is suitable for either a water-based system or solvent-based system. The micro-encapsulated UV absorber increases the light-fastness and maintains longer-term light resistance because the UV absorber is gradually released from the microcapsule. The ink composition of the present invention provides excellent printing quality when used in inkjet or screen printing.

Abstract: A cyan dye set and ink-jet ink composition with high water-fastness. The cyan dye set is suitable for use in ink-jet printing and includes Acid Blue 90 dye and at least one copper phthalocyanine type blue dye. The cyan dye set has good water-fastness and exhibits improved printing quality when applied in ink-jet printing.

Abstract: An ink-jet ink comprising a glycol compound with grafts, an aqueous solution, a pigment as a colorant, a surfactant, and a humectant is disclosed. The ink-jet ink has low surface tension and high drying speed. Moreover, the ink-jet ink has high adhesive force between the ink drops and the printing medium, and thus provides the printing medium with high water fastness.

Abstract: A jet ink of magenta comprising reactive red 180, acid red 52, and reactive red is disclosed in the present invention, wherein the said jet ink of magenta has the advantages of decreasing the color-fading phenomenon due to water exposure and light irradiation. Therefore, the properties of light-fastness and water-fastness are improved greatly, and thus, so is the printing quality.