Abstract: A water-based maintenance liquid is used for a recording apparatus, the recording apparatus is an apparatus to perform recording by ejecting at least two types of water-based ink compositions from an ink jet head, the ink jet head has a nozzle surface in which nozzles to eject the water-based ink compositions are formed, the nozzles are formed in the nozzle surface respectively for the at least two types of water-based ink compositions, the maintenance liquid is used to moisturize the nozzle surface by being supplied to a cap portion which covers the nozzle surface and includes water and a moisturizing agent component which contains at least one type of moisturizing agent, the moisturizing agent component is a water-soluble organic compound, and a content A (percent by mass) of the moisturizing agent component with respect to a total mass of the moisturizing agent component and the water satisfies a predetermined equation.

Abstract: A maintenance liquid is used to maintain an ink jet head of a printing apparatus configured to eject an ink for printing from the ink jet head. The maintenance liquid is aqueous and subject to detection by a conductivity-based sensor. The maintenance liquid includes at least one selected from the group consisting of inorganic alkalis and ethylenediaminetetraacetic acid compounds and at least one selected from the group consisting of organic acids and organic alkalis. The maintenance liquid has an electrical conductivity of 100 ?S/cm or more and a pH of 6.0 to 11.

Abstract: A liquid ejection apparatus includes a first storage portion capable of storing a liquid supplied from a liquid container, a first open-to-atmosphere channel configured to open the inside of the first storage portion to the atmosphere, a second storage portion capable of storing the liquid supplied from the first storage portion, and a second open-to-atmosphere channel configured to open the inside of the second storage portion to the atmosphere. The liquid ejection apparatus is configured to select either a normal mode or a transport mode. The normal mode is a mode in which the power is switched off with the first open-to-atmosphere channel open and the second open-to-atmosphere channel open. The transport mode is a mode in which the power is switched off with the first open-to-atmosphere channel open and the second open-to-atmosphere channel closed.

Abstract: A capping device configured to form a space surrounding an opening of a nozzle by coming into contact with a liquid ejecting head having the nozzle for ejecting a liquid, includes a unit cap, which is an example of a cap, including a recess that forms the space, a humidifying chamber that has an inlet through which a humidifying fluid for humidifying the space flows in and an outlet through which the humidifying fluid flows out, and a first moisture permeable membrane, which is an example of a partition wall, having gas permeability, that partitions the recess and the humidifying chamber. The recess has a discharge hole, which is an example of a hole for discharging the liquid discharged from the liquid ejecting head, which is the example of the cap.

Abstract: A capping device configured to form a space surrounding an opening of a nozzle by coming into contact with a liquid ejecting head having the nozzle for ejecting a liquid, includes a unit cap, which is an example of a cap, including a recess that forms the space, a humidifying chamber that has an inlet through which a humidifying fluid for humidifying the space flows in and an outlet through which the humidifying fluid flows out, and a first moisture permeable membrane, which is an example of a partition wall, having gas permeability, that partitions the recess and the humidifying chamber. The recess has a discharge hole, which is an example of a hole for discharging the liquid discharged from the liquid ejecting head, which is the example of the cap.

Abstract: The liquid ejection apparatus includes a liquid ejection head, a cap having a closed space forming section forming a closed space, an inflow port through which a humidification fluid flows in, and an outflow port through which the humidification fluid flows out, a humidification fluid storage section storing the humidification fluid, a supply flow path communicating the humidification fluid storage section with the inflow port, a collection flow path communicating the humidification fluid storage section with the outflow port, a pump, a moisture supply section, and a controller. One end of the collection flow path opens at a position in the humidification fluid storage section that is lower than a liquid surface of the humidification fluid. The controller causes the moisture supply section to supply water into the circulation path and drives the pump to cause the humidification fluid to flow in the circulation path.

Abstract: A capping device includes a cap configured to form a closed space by contacting a liquid ejection head configured to eject liquid from a nozzle in a first direction having a horizontal direction component and a gravity direction component, the nozzle opening up into the closed space, and a cap moving section configured to move the cap in a second direction different from the first direction while holding the cap, wherein the second direction has a gravity direction component, the cap moving section has a guide section extending in the second direction, and the cap has a guided section guided by the guide section and is configured to be attachable to and detachable from the cap moving section from an upper end of the guide section.

Abstract: A liquid discharge apparatus including: a first storage section that stores a liquid; a second storage section that communicates with the first storage section; a supply channel that supplies the liquid from the second storage section to a liquid ejecting head; a collection channel that collects the liquid from the liquid ejecting head to the first storage section; the pressurization section that pressurizes the inside of the second storage section; and a control section, in which the first storage section, the supply channel, the liquid ejecting head, the collection channel, the second storage section, and the communication path form a circulation route, and the control section is configured to execute discharge circulation in which circulation of the liquid is performed while discharging the liquid from the nozzle, and non-discharge circulation in which circulation of the liquid is performed without discharging the liquid from the nozzle.

Abstract: A capping device configured to form a space surrounding an opening of a nozzle by coming into contact with a liquid ejecting head having the nozzle for ejecting a liquid, includes a unit cap, which is an example of a cap, including a recess that forms the space, a humidifying chamber that has an inlet through which a humidifying fluid for humidifying the space flows in and an outlet through which the humidifying fluid flows out, and a first moisture permeable membrane, which is an example of a partition wall, having gas permeability, that partitions the recess and the humidifying chamber. The recess has a discharge hole, which is an example of a hole for discharging the liquid discharged from the liquid ejecting head, which is the example of the cap.

Abstract: A liquid ejecting apparatus includes: a liquid ejecting head having a nozzle that ejects liquid; a supply flow path that supplies the liquid to the liquid ejecting head; a pressurizing mechanism that pressurizes a region which communicates with the supply flow path; a decompression mechanism that decompresses the region pressurized by the pressurizing mechanism; and a resistor section that interferes with decompression by the decompression mechanism.

Abstract: A liquid ejecting apparatus includes a liquid ejecting head including a front end surface, an upstream surface that intersects with the front end surface, and a nozzle that opens at the front end surface, the liquid ejecting head being configured to eject liquid from the nozzle, and a wiping member configured to wipe the front end surface in a wiping direction. The upstream surface is located upstream of the front end surface in the wiping direction. A liquid repellent surface that repels the liquid is provided in a portion of the front end surface where the nozzle opens. A lyophilic surface having a higher affinity for the liquid than the liquid repellent surface is provided on the upstream surface and the front end surface. A portion of the lyophilic surface on the upstream surface is connected to a portion of the lyophilic surface on the front end surface.

Abstract: A liquid ejecting apparatus includes: a liquid ejecting head having a nozzle that ejects liquid; a supply flow path that supplies the liquid to the liquid ejecting head; a pressurizing mechanism that pressurizes a region which communicates with the supply flow path; a decompression mechanism that decompresses the region pressurized by the pressurizing mechanism; and a resistor section that interferes with decompression by the decompression mechanism.