A textile printing ink jet ink composition includes a dioxazine pigment, a resin particle, and a lubricant, wherein the content of the dioxazine pigment is 0.5 to 1.5 mass % based on the total amount of the ink composition.

A clear ink includes resin particles and water, wherein a volume average particle diameter of the resin particles is 50 nm or less, and wherein a dried film of the clear ink has glass transition temperatures (Tg) at 50 degrees C. or higher and at lower than 0 degrees C.

A clear ink includes resin particles and water, wherein a volume average particle diameter of the resin particles is 50 nm or less, and wherein a dried film of the clear ink has glass transition temperatures (Tg) at 50 degrees C. or higher and at lower than 0 degrees C.

Provided is an aqueous ink composition for writing instruments containing colored resin particles encapsulating a pigment, wherein the ink is not repelled when the aqueous ink composition for writing instruments is used to write on a paper face attached with hand fingers or the like, and achieves a uniform density in a drawn line and excellent writing capability. An embodiment of the aqueous ink composition for writing instruments is an aqueous ink composition for writing instruments containing at least a pigment (a) and colored resin particles (A) encapsulating the pigment (a).

Provided is an aqueous ink composition for writing instruments containing colored resin particles encapsulating a pigment, wherein the ink is not repelled when the aqueous ink composition for writing instruments is used to write on a paper face attached with hand fingers or the like, and achieves a uniform density in a drawn line and excellent writing capability. An embodiment of the aqueous ink composition for writing instruments is an aqueous ink composition for writing instruments containing at least a pigment (a) and colored resin particles (A) encapsulating the pigment (a).

A composition of matter comprises at least 10 wt % epoxy functionalized two-dimensional shaped particles, carbon nanotubes in the range of 0.1 to 5 wt %, epoxy resin and a curing agent. A method of manufacturing a composition of matter includes mixing epoxy resin, carbon nanotubes and a solvent to produce a material, drying the material, and mixing the material with a curing agent to product the composition of matter. A method of printing a composition of matter includes producing the composition of matter by combining epoxy functionalized graphene, carbon nanotubes, epoxy base resin, and a curing agent, extrusion printing the composition of matter into a desired pattern, and curing the pattern.

A composition of matter comprises at least 10 wt % epoxy functionalized two-dimensional shaped particles, carbon nanotubes in the range of 0.1 to 5 wt %, epoxy resin and a curing agent. A method of manufacturing a composition of matter includes mixing epoxy resin, carbon nanotubes and a solvent to produce a material, drying the material, and mixing the material with a curing agent to product the composition of matter. A method of printing a composition of matter includes producing the composition of matter by combining epoxy functionalized graphene, carbon nanotubes, epoxy base resin, and a curing agent, extrusion printing the composition of matter into a desired pattern, and curing the pattern.

A cleaning liquid includes water, a surfactant, and glycol ether. The surfactant is an acetylene surfactant or a silicone surfactant. A content ratio of the glycol ether is at least 5% by mass and no greater than 15% by mass relative to a mass of the cleaning liquid. Preferably, a contact angle of the cleaning liquid to an austenitic stainless steel plate is no greater than 40 degrees.

A cleaning liquid includes water, a surfactant, and glycol ether. The surfactant is an acetylene surfactant or a silicone surfactant. A content ratio of the glycol ether is at least 5% by mass and no greater than 15% by mass relative to a mass of the cleaning liquid. Preferably, a contact angle of the cleaning liquid to an austenitic stainless steel plate is no greater than 40 degrees.

A liquid discharge apparatus includes: an ink composition containing 2-pyrrolidone and an alcohol having a main chain having 6 or less carbon atoms; a liquid discharge unit configured to discharge the ink composition from a nozzle formed in a nozzle surface; and a wiping unit configured to wipe the nozzle surface. The wiping unit includes a wiping member including protrusion-shape fibers. Each of the protrusion-shape fibers has a protruded portion in a cross-section orthogonal to a fiber axis thereof. The protruded portion is continuous in a direction along the fiber axis.