A printing medium used for a thermal printer includes a heat sensitive medium and an adhesive medium, The heat sensitive medium includes a heat sensitive base layer and a first color layer, both of which has transparency. The heat sensitive base layer has a first surface and a second surface opposite to the first surface in a thickness direction of a thickness. The first color layer is formed on the heat sensitive base layer at a position closer to the first surface than to the second surface in the thickness direction, The first color layer loses transparency and is colored into a first color upon being heated. The adhesive medium contains pearlescent pigment. The adhesive medium includes an adhesive base layer and an adhesive layer stuck to the heat sensitive medium in the thickness direction and is positioned closer to the first surface than to the second surface.

A printer includes, a casing, a cover provided swingably, the cover covering an opening portion of the casing, a printing portion configured to print on a print medium, a ribbon supply shaft configured to hold an ink ribbon to be supplied to the printing portion, and a printing unit provided swingably, in a state where the printing unit is accommodated in the cover, rotation of the ribbon supply shaft is permitted, and when the open end side of the printing unit is separated from the cover and the ribbon supply shaft is placed at a ribbon replacement position where the ink ribbon is attachable and detachable, the rotation of the ribbon supply shaft is regulated.

Disclosed is a printing device including a main body portion including a body portion configured to provide an internal space in which recording paper for printing certain information thereon is transferred and an opening or closing portion configured to control opening or closing of the internal space, a printing portion configured to print the certain information on the recording paper transferred in the internal space, and a recording paper separation portion located on a downstream side of the printing portion and configured to cut or cut off and separate recording paper on which particular information is printed by the printing portion from the other recording paper. Here, the main body portion includes a protruding portion configured to prevent an adhesive attached to the surface opposite the adhesive surface from being accumulated by decreasing a contact area with the surface opposite the adhesive surface.

Disclosed is a printing device including a main body portion including a body portion configured to provide an internal space in which recording paper for printing certain information thereon is transferred and an opening or closing portion configured to control opening or closing of the internal space, a printing portion configured to print the certain information on the recording paper transferred in the internal space, and a recording paper separation portion located on a downstream side of the printing portion and configured to cut or cut off and separate recording paper on which particular information is printed by the printing portion from the other recording paper. Here, the main body portion includes a protruding portion configured to prevent an adhesive attached to the surface opposite the adhesive surface from being accumulated by decreasing a contact area with the surface opposite the adhesive surface.

A printing system includes a printing device including a thermal head that prints print content on a print medium; and an information processing apparatus that controls the printing device. The information processing apparatus comprises a processor configured to detect, from print image data from a server, a position of a control target portion including a specific portion in a print image corresponding to the print image data. The processor is configured to generate printing control information for printing the control target portion. The processor is configured to transmit the print image data, the position of the control target portion, and the printing control information to the printing device. The printing device executes different printing controls for the control target portion and a portion other than the control target portion based on the print image data, the position of the control target portion, and the printing control information.

A multicolor thermal printer comprising a controller, a thermal printhead, multicolor thermal paper, a monochrome lightness sensor, and a calibration subsystem is described. The calibration subsystem prints a calibration target that is scanned by the monochrome lightness sensor to determine if color crosstalk is present. If color crosstalk is present, the calibration subsystem decreases the contone range of affected colors and saves the new calibration settings.

A multicolor thermal printer comprising a controller, a thermal printhead, multicolor thermal paper, a monochrome lightness sensor, and a calibration subsystem is described. The calibration subsystem prints a calibration target that is scanned by the monochrome lightness sensor to determine if color crosstalk is present. If color crosstalk is present, the calibration subsystem decreases the contone range of affected colors and saves the new calibration settings.

A thermosensitive recording medium having a thermosensitive coloring layer containing an electron-donating dye precursor, a radical photopolymerization initiator, and an electron-accepting compound with a radical polymerizable group, wherein the electron-accepting compound with a radical polymerizable group includes a compound A represented by the formula (1):

##STR00001##

A thermosensitive recording medium having a thermosensitive coloring layer containing an electron-donating dye precursor, a radical photopolymerization initiator, and an electron-accepting compound with a radical polymerizable group, wherein the electron-accepting compound with a radical polymerizable group includes a compound A represented by the formula (1):

##STR00001##

The controller executes the first process once and then executes the second process. The first process is a process for back-feeding the continuous body, writing information to the RFID inlet, and then forward-feeding the continuous body until the RFID medium reaches the print start position. The second process is a process for stopping printing on the RFID medium halfway and writing information to the subsequent RFID medium following the RFID medium under printing when the RFID inlet of the subsequent RFID medium reaches the position allowing the communication with the antenna, and then resuming and completing printing on the RFID medium, printing on which was stopped halfway.