Printing apparatus, printing system, printing method, and non-transitory recording medium

A printing apparatus comprising:

• a print execution device including a plurality of heads to print an image on a print medium based on print data;
• an illumination device, positioned outside of the printing apparatus, to irradiate the printed image on the print medium with illumination light from behind a printed face of the print medium;
• a sheet ejection guide, wherein the illumination light is emitted from behind the printed face onto the printed surface of the print medium ejected by the sheet ejection guide from the printing apparatus;
• and
• circuitry configured to determine an irradiation condition, which includes at least one of a position of a light source of the illumination light or a range of the light source of the illumination light, based on attribute information of the print medium, wherein the attribute information is information indicating a width of the print medium in a direction orthogonal to a conveyance direction in which the print medium is conveyed,
• wherein the illumination device emits the illumination light based on the irradiation condition,
• wherein the attribute information is information indicating transparency of the print medium.

A printing apparatus comprising:

• a print execution device including a plurality of heads to print an image on a print medium based on print data;
• an illumination device, positioned outside of the printing apparatus, to irradiate the printed image on the print medium with illumination light from behind a printed face of the print medium;
• a sheet ejection guide, wherein the illumination light is emitted from behind the printed face onto the printed surface of the print medium ejected by the sheet ejection guide from the printing apparatus;
• and
• circuitry configured to determine an irradiation condition, which includes at least one of a position of a light source of the illumination light or a range of the light source of the illumination light, based on attribute information of the print medium, wherein the attribute information is information indicating a width of the print medium in a direction orthogonal to a conveyance direction in which the print medium is conveyed,
• wherein the illumination device emits the illumination light based on the irradiation condition,
• wherein the circuitry is configured to:
• receive an input of a usage environment of the print medium;
• and
• determine the irradiation condition based on the attribute information and the usage environment.

A non-transitory recording medium storing a plurality of instructions which, when executed by one or more processors of a printing apparatus, causes the one or more processors to perform a printing method, the method comprising:

• determining an irradiation condition of illumination light based on attribute information of a print medium;
• printing an image on the print medium based on print data;
• and
• irradiating the printed image by an illumination device on the print medium with the illumination light from behind a printed face of the print medium after the print medium being ejected by a sheet ejection guide from the printing apparatus, wherein the illumination device is positioned outside of the printing apparatus, based on the determined irradiation condition,
• wherein the irradiation condition includes at least one of a position of a light source of the illumination light or a range of the light source of the illumination light, and
• wherein the attribute information is information indicating a width of the print medium in a direction orthogonal to a conveyance direction in which the print medium is conveyed.