Printing system

A printing controller connected to and controlling a printer for printing a primary image and a watermark on a recording medium, the printing controller being capable of switching the printer between a multicolor printing mode and a monochrome printing mode, one of the multicolor printing mode and the monochrome printing mode being set for the primary image, the printing controller comprising:

• a storing unit that stores a plurality of watermarks and a plurality of group information each being an identifier for sorting the plurality of watermarks into groups;
• a watermark selecting unit that accepts a user's input selecting a watermark from the plurality of watermarks;
• at least one processor;
• and
• memory storing computer-readable instructions that, when executed by the at least one processor, cause the printing controller to provide:
• a determining unit that determines, based on the watermark selected by the watermark selecting unit and the group information corresponding to the watermark, whether the watermark has an attribute indicating the monochrome printing mode;
• and
• a color restricting unit that, even if the multicolor printing mode is set for the primary image, controls the printer to print the primary image and the watermark in the monochrome printing mode if the determining unit determines that the watermark has the attribute indicating the monochrome printing mode.

A non-transitory computer-readable storage medium storing computer-readable instructions for instructing a printing system including a printing unit capable of printing a primary image and a watermark on a recording medium and switching between a multicolor printing mode and a monochrome printing mode, one of the multicolor printing mode and the monochrome printing mode being set for the primary image, wherein the computer-readable instructions, when executed by at least one computing device, cause the at least one computing device to:

• store a plurality of watermarks and a plurality of group information each being an identifier for sorting the plurality of watermarks into groups;
• accept a user's input selecting a watermark from the plurality of watermarks;
• determine, based on the watermark selected and the group information corresponding to the watermark, whether the watermark has an attribute indicating the monochrome printing mode;
• and
• control the printing unit to print the primary image and the watermark in the monochrome printing mode, even if the multicolor printing mode is set for the primary image, if it is determined that the watermark has the attribute indicating the monochrome printing mode.

A print controlling method for a printing system including a printing unit 1 capable of printing a primary image and a watermark on a recording medium and switching between a multicolor printing mode and a monochrome printing mode, one of the multicolor printing mode and the monochrome printing mode being set for the primary image, the print controlling method comprising:

• storing, by a computing device, a plurality of watermarks and a plurality of group information each being an identifier for sorting the plurality of watermarks into groups;
• accepting, by the computing device, a user's input selecting a watermark from the plurality of watermarks;
• determining, by the computing device, whether the watermark has an attribute indicating the monochrome printing mode based on the watermark selected and the group information corresponding to the selected watermark;
• and
• controlling, by the computing device, the printing unit to print the primary image and the watermark in the monochrome printing mode, even if the multicolor printing mode is set for the primary image, if the determining determines that the watermark has the attribute indicating the monochrome printing mode.