A recording method according to the present disclosure is a recording method that performs recording on a recording medium, the recording method including a white ink adhesion step of adhering a white ink composition containing a white color material to the recording medium and a non-white ink adhesion step of adhering a non-white ink composition containing a non-white color material to the recording medium, in which the white ink adhesion step and the non-white ink adhesion step are performed by relative scanning between a recording head and the recording medium, the white ink adhesion step and the non-white ink adhesion step are performed by the same relative scanning on the same scanning region of the recording medium, and in the recording region to which the white ink composition and the non-white ink composition are adhered, an adhesion amount of the white ink composition is 60% by mass or less with respect to 100% by mass of an adhesion amount of the non-white ink composition per unit region.

An ink jet method includes a step of adhering ink jet compositions containing colorants and polymerizable compounds to be cured with radioactive rays to a recording medium by one printing operation, and the ink jet compositions includes an orange ink composition and a red ink composition.

A recording method for performing recording on a recording medium includes a processing liquid attaching step of attaching a processing liquid including an aggregating agent to the recording medium, a white ink attaching step of attaching a white ink composition including a white coloring material to the recording medium, and a non-white ink attaching step of attaching a non-white ink composition including a non-white coloring material to the recording medium, in which attachment of the white ink composition and attachment of the non-white ink composition are performed by relative scanning of a recording head and the recording medium, and attachment of the white ink composition and attachment of the non-white ink composition are performed on a scanning region of the recording medium by a relative scanning.

The present disclosure provides a liquid ejection device to which an additional head can be attached and which suppresses a reduction in print quality. The liquid ejection device includes a main scanning drive portion that transports, in a main scanning direction, a carriage on which are mounted a base printing head that ejects ink for base printing onto a print medium, and a color printing head that ejects at least two colors of ink, from yellow, magenta, cyan, and black, onto the print medium, the base printing head and the color printing head being separated from each other in the sub-scanning direction. Between the base printing head and the color printing head on the carriage, the liquid ejection device includes an additional head attachment portion to which the additional head can be added.

The width by which the first, second heads overlap each other cross-sectionally along the first direction is greater than the width by which the fifth, sixth heads overlap each other cross-sectionally along the first direction.

An ink set according to one embodiment of the disclosure includes a colored ink composition, which contains a pigment and is a water-based ink jet ink, and a water-based resin liquid composition which contains a resin, in which the resin liquid composition contains a urethane resin having an alicyclic structure or an aromatic ring structure and an acid value of 50 to 100 mg KOH/g.

A white ink composition which is an aqueous ink jet ink, includes a white colorant and a fixing resin, and the fixing resin contains an acrylic-based resin having an acid value of 50.0 to 100.0 mgKOH/g and a glass transition temperature of 20.0° C. to 50.0° C.

A printer includes an ink tank, a print head that performs printing using ink IK in the ink tank, a light source that emits light into the ink tank, a sensor that detects first light of a first wavelength band and second light of a second wavelength band incident from an ink tank side, in a period during which the light source emits light, and a processing section. The processing section determines the ink type of the ink in the ink tank based on a first light amount of the first light and a second light amount of the second light at a position where the ink exists.

The printing medium M after color printing is performed on the front surface M1 (recording surface) by the color printing unit 32 can be conveyed while the front surface M1 and the back surface M2 of the printing medium M are inverted twice by the only rollers 471 to 478 (rotary bodies) in contact with the back surface M2 (non-recording surface) of the printing medium M (inverting conveying part 47). In this way, without providing air turn bars, a time to convey the printing medium M from the color printing unit 32 to the white printing unit 33 can be secured while the printing medium M is firmly supported by the rollers 471 to 478 in contact with the back surface M2 of the printing medium M.

A printing apparatus includes a printing head including a nozzle configured to discharge a dot of a first size and a dot of a second size smaller than the first size, the dots being ink dots, and a control unit configured to control the printing head to print, on a printing medium, a test pattern for inspecting a state of ink discharge by the nozzle. The test pattern includes a first pattern element formed by a plurality of the dots of the first size and a second pattern element formed by a plurality of the dots of the second size. The control unit causes the printing head to print the test pattern where a number of the dots of the second size forming the second pattern element is greater than a number of the dots of the first size forming the first pattern element.