A liquid ejection apparatus includes a liquid ejection head and a control unit that controls this head. The liquid ejection head includes ejection energy generating elements for ejecting the liquid present in pressure chambers from ejection ports, circulation energy generating elements for circulating the liquid present in the pressure chambers inside the liquid ejection head, and a unit that inputs ejection energy generating element selection signals, ejection time-division selection signals, and a circulation cycle control signal. The liquid ejection head circulates the liquid by driving the circulation energy generating element selected by the circulation energy generation element selection signal and the circulation time-division selection signal. The control unit includes a unit that generates the circulation cycle control signal such that a cycle of the circulation timedivision selection signals is equal to or longer than a cycle of the ejection time-division selection signals.

A liquid ejection apparatus includes a liquid ejection head and a control unit that controls this head. The liquid ejection head includes ejection energy generating elements for ejecting the liquid present in pressure chambers from ejection ports, circulation energy generating elements for circulating the liquid present in the pressure chambers inside the liquid ejection head, and a unit that inputs ejection energy generating element selection signals, ejection time-division selection signals, and a circulation cycle control signal. The liquid ejection head circulates the liquid by driving the circulation energy generating element selected by the circulation energy generation element selection signal and the circulation time-division selection signal. The control unit includes a unit that generates the circulation cycle control signal such that a cycle of the circulation timedivision selection signals is equal to or longer than a cycle of the ejection time-division selection signals.

A container includes a container body, and a cover attached to the container body. The container body includes a front wall, a rear wall, and a liquid channel. The container body has a storage chamber in fluid communication with the liquid channel and positioned between the front wall and the rear wall in a front-rear direction. The liquid channel extends in the front-rear direction to have a supply opening that is open on the front wall and that is open frontward. The cover has an opening that is open rearward and the cover covers least a part of an outer surface of the front wall. The supply opening of the container body is positioned below a lower end of the opening of the cover.

A container includes a container body, and a cover attached to the container body. The container body includes a front wall, a rear wall, and a liquid channel. The container body has a storage chamber in fluid communication with the liquid channel and positioned between the front wall and the rear wall in a front-rear direction. The liquid channel extends in the front-rear direction to have a supply opening that is open on the front wall and that is open frontward. The cover has an opening that is open rearward and the cover covers least a part of an outer surface of the front wall. The supply opening of the container body is positioned below a lower end of the opening of the cover.

An ink includes: a white pigment formed of titanium oxide; a resin binder; a surfactant having an HLB value of 10 or more; and water. In this ink, by blending the resin binder, it is possible to improve the adhesion of a white image to a recording medium. Further, in this ink, by blending a surfactant having an HLB value of 10 or more, high dispersibility of the white pigment formed of titanium oxide in an aqueous solvent is achieved and the dispersed state of the white pigment in the aqueous solvent is easily maintained for a long period of time.

An ink includes: a white pigment formed of titanium oxide; a resin binder; a surfactant having an HLB value of 10 or more; and water. In this ink, by blending the resin binder, it is possible to improve the adhesion of a white image to a recording medium. Further, in this ink, by blending a surfactant having an HLB value of 10 or more, high dispersibility of the white pigment formed of titanium oxide in an aqueous solvent is achieved and the dispersed state of the white pigment in the aqueous solvent is easily maintained for a long period of time.

A printing device includes a head configured to discharge an ink; a circulation path through which a temperature-controlled liquid circulates through an interior of the head; a liquid feeder configured to feed the temperature-controlled liquid; a temperature detector configured to detect a head temperature or a correlation temperature correlated with the head temperature; a temperature controller including circuitry configured to control the head temperature or the correlation temperature; and an environment humidity sensor configured to detect a humidity of an environment in which the printing device is disposed.

A printing device includes a head configured to discharge an ink; a circulation path through which a temperature-controlled liquid circulates through an interior of the head; a liquid feeder configured to feed the temperature-controlled liquid; a temperature detector configured to detect a head temperature or a correlation temperature correlated with the head temperature; a temperature controller including circuitry configured to control the head temperature or the correlation temperature; and an environment humidity sensor configured to detect a humidity of an environment in which the printing device is disposed.

A stirring apparatus includes a storage portion configured to store a container, a stirring unit configured to perform a stirring operation for the container stored in the storage portion such that a liquid contained in the container is stirred, a regulating unit whose state changes between a regulating state in which extraction of the container from the storage portion is regulated and a regulation cancel state, and a control unit.

The control unit interrupts the stirring operation upon determining that the state of the regulating unit changes from the regulating state to the regulation cancel state during the stirring operation, and resumes the stirring operation upon determining that the state of the regulating unit changes from the regulation cancel state to the regulating state during the interruption of the stirring operation.

A stirring apparatus includes a storage portion configured to store a container, a stirring unit configured to perform a stirring operation for the container stored in the storage portion such that a liquid contained in the container is stirred, a regulating unit whose state changes between a regulating state in which extraction of the container from the storage portion is regulated and a regulation cancel state, and a control unit.

The control unit interrupts the stirring operation upon determining that the state of the regulating unit changes from the regulating state to the regulation cancel state during the stirring operation, and resumes the stirring operation upon determining that the state of the regulating unit changes from the regulation cancel state to the regulating state during the interruption of the stirring operation.