Printer including color material cartridge having removably attached advance payment information storage section

A printer that prints on a medium with a color material, comprising:

• a cartridge;
• a cartridge accommodating section that removably accommodates the cartridge to which an advance payment information storage section for storing therein advance payment information before a use of the cartridge is attached and which contains the color material,
• an advance payment information reading/writing section that reads/writes the advance payment information to/from the advance payment information storage section;
• a print control section that outputs a print driving signal for controlling to print;
• a printing section that prints by using the color material in the cartridge based on the print driving signal outputted from the print control section;
• a print driving signal converting section that acquires the print driving signal outputted from the print control section and converts the same to accounting information;
• and
• a settlement section that settles the advance payment information read by the advance payment information reading/writing section based on the accounting information converted by the print driving signal converting section;
• wherein
• the cartridge includes an ink information storage section that stores therein information on a printing amount of ink used by the cartridge, the advance payment information reading/writing section reads the advance payment information corresponding to the remaining amount enough to print with the cartridge based on the information on the printing amount of ink stored in the ink information storage section before the printing section prints,
• the print control section outputs the print driving signal to the printing section provided that the advance payment information corresponding to the remaining amount is read from the advance payment information reading/writing section,
• the print driving signal converting section judges whether the advance payment information storage section is attached to the cartridge, and
• the advance payment information storage section is removably attached to the cartridge.