PRINTING APPARATUS

摘要

A printing apparatus includes: a supporting member which supports a medium; a transport device which transports the medium; first to fourth heads which eject first to fourth radiation curable type inks; a first irradiation section; a second irradiation section; a third irradiation section; and a fourth irradiation section which is arranged on the downstream side of the fourth head, in which the radiation rays respectively irradiated from the first irradiation section to the third irradiation section have a peak wavelength of 350 nm to 450 nm, and coloring materials included in the third ink and the fourth ink have higher absorption properties of the radiation rays with the peak wavelength than coloring materials included in the first ink and the second ink.

主权项

1. A printing apparatus comprising:
a supporting member which supports a medium; a transport device which transports the medium supported by the supporting member in a transport direction; a first head which ejects a first radiation curable type ink; a second head which is arranged on a downstream side of the first head in the transport direction and ejects a second radiation curable type ink; a third head which is arranged on the downstream side of the second head in the transport direction and ejects a third radiation curable type ink; a fourth head which is arranged on the downstream side of the third head in the transport direction and ejects a fourth radiation curable type ink; a first irradiation section which is arranged between the first head and the second head in the transport direction and irradiates radiation rays with an integrated light quantity to a degree at which the first ink ejected from the first head is not completely cured; a second irradiation section which is arranged between the second head and the third head in the transport direction and irradiates radiation rays with an integrated light quantity to a degree at which the second ink ejected from the second head is not completely cured; a third irradiation section which is arranged between the third head and the fourth head in the transport direction and irradiates radiation rays with an integrated light quantity to a degree at which the third ink ejected from the third head is not completely cured; and a fourth irradiation section which is arranged on the downstream side of the fourth head in the transport direction and irradiates radiation rays with an integrated light quantity to a degree at which wetting and spreading of the first to fourth inks respectively ejected from the first to fourth heads are stopped on the medium, wherein the radiation rays respectively irradiated from the first irradiation section to the third irradiation section have a peak wavelength of 350 nm to 450 nm, and coloring materials included in the third ink and the fourth ink have higher absorption properties of the radiation rays with the peak wavelength than coloring materials included in the first ink and the second ink.