Printing apparatus, program, storage medium, method, and ink

A program for controlling a printing apparatus to perform printing and decolorization on a medium, comprising:

• controlling the printing apparatus to perform the printing and the decolorization by using a ink containing a coloring component which is decolorizable by ultraviolet light and a curing component which is curable by the ultraviolet light, a light amount of the ultraviolet light required for curing being smaller than a light amount of the ultraviolet light required for the decolorization;
• controlling the printing apparatus to execute the printing by using the ink when a printing mode is selected from a plurality of operation modes including the printing mode and an erasing mode, and controlling the printing apparatus to execute the decolorization of the ink when the erasing mode is selected from the plurality of operation modes;
• controlling, when the printing is performed, the ink-jet head to discharge the ink toward the medium to deposit the ink to the medium, and controlling the UV light source to radiate the ultraviolet light, in a light amount with which the coloring component is not decolorized, toward the ink deposited to the medium to cure the curing component;
• and
• controlling, when the decolorization is performed, the UV light source to radiate, toward the medium, the ultraviolet light in a light amount greater than the light amount of the ultraviolet light radiated when the printing is performed to decolorize the coloring component.

A method for performing printing and decolorization on a medium, comprising:

• providing a ink containing a coloring component which is decolorizable by ultraviolet light and a curing component which is curable by the ultraviolet light, a light amount of the ultraviolet light required for curing being smaller than a light amount of the ultraviolet light required for the decolorization;
• discharging the ink toward the medium to deposit the ink and curing the curing component by radiating the ultraviolet light, in a light amount with which the coloring component is not decolorized, toward the ink deposited to the medium, when a printing mode is selected from a plurality of operation modes including the printing mode and an erasing mode;
• and
• decolorizing the coloring component by radiating, toward the medium, the ultraviolet light in a light amount greater than the light amount of the ultraviolet light radiated in the printing mode, when the erasing mode is selected from the plurality of operation modes.

An ink comprising:

• a coloring component which is decolorizable by ultraviolet light;
• and
• a curing component which is curable by the ultraviolet light,
• wherein a light amount of the ultraviolet light required to cure the curing component is smaller than a light amount of the ultraviolet light required to decolorize the coloring component.