Formation of a multi-colored image in thermochromic material involves controlling operation of first, second, and third heat sources. The first heat source heats pixels of the thermochromic material to activate the pixels. The second and third heat sources are selectively controlled to heat different sets of pixels using neither, one, or both of the second and third heat sources.

An example disclosed media processing device includes an image processing unit; a first optical registration sensor; and a second optical registration sensor spaced apart from the first optical registration sensor along a first axis by a first distance associated with a gap between media units on a web.

An example disclosed media processing device includes an image processing unit; a first optical registration sensor; and a second optical registration sensor spaced apart from the first optical registration sensor along a first axis by a first distance associated with a gap between media units on a web.

Systems and methods where multi-color graphics on a substrate are printed at a first resolution, and single color data is printed at a second, higher resolution using the same print head. The multi-color graphics can be a printed photograph of a person, a printed logo, or any printed feature that is printed using multiple colors. The single color data can be printed alphanumeric text such as a person's name, address, account number or any other data that is printed using a single color.

A method of marking a package (72) includes providing a package (72) including an additive transformable from a first state to a second state in response to an external stimulus and presenting said package via a sales device (80). At least a portion of said additive is in said first state when said package is presented in said sales device (80). At least a portion of said additive is activated to form identifying indicia on said package within said sales device (80).

A method of marking a package (72) includes providing a package (72) including an additive transformable from a first state to a second state in response to an external stimulus and presenting said package via a sales device (80). At least a portion of said additive is in said first state when said package is presented in said sales device (80). At least a portion of said additive is activated to form identifying indicia on said package within said sales device (80).

An erasing unit according to an embodiment of the present disclosure is a unit that performs erasing of information written on a reversible recording medium. This erasing unit includes: a light source section including one or a plurality of laser devices; and a controller that controls the light source section to cause the light source section to emit a smaller number of laser light beams having emission wavelengths than the number of the recording layers included in the reversible recording medium.

An erasing unit according to an embodiment of the present disclosure is a unit that performs erasing of information written on a reversible recording medium. This erasing unit includes: a light source section including one or a plurality of laser devices; and a controller that controls the light source section to cause the light source section to emit a smaller number of laser light beams having emission wavelengths than the number of the recording layers included in the reversible recording medium.

A three-dimensional structure according to an embodiment of the present disclosure includes: a plurality of resin layers including a light curable resin, the light curable resin including a coloring compound, a color developing-reducing agent, and a photothermal conversion agent, the plurality of resin layers being stacked, the color developing-reducing agent having an average particle diameter of 10 m or more and 100 m or less.

A three-dimensional structure according to an embodiment of the present disclosure includes a plurality of resin layers including a light curable resin, a coloring compound, a color developing-reducing agent, and a photothermal conversion agent, the plurality of resin layers being stacked.