System, control method therefor, printing apparatus, and control method therefor

A printing apparatus equipped with at least one tank containing printing materials of at least two colors, comprising:

• an obtaining unit configured to obtain predetermined information relating to amount of printing materials for a tank attached to the printing apparatus;
• and
• a determining unit configured to determine an interchangeable tank to be provided from a plurality of types of interchangeable tanks based on the predetermined information obtained by the obtaining unit,
• wherein the plurality of types of interchangeable tanks include a first tank and a second tank,
• the first tank contains printing materials of at least two colors, with a ratio of amounts of the printing materials of the at least two colors being a first constituent ratio, and
• the second tank contains printing materials of at least the same two colors as those in the first tank, with a ratio of amounts of the printing materials of at least the two colors being a second constituent ratio different from the first constituent ratio.

A method of controlling a system which provides an interchangeable tank for a printing apparatus to which at least one tank containing printing materials of at least two colors is attached, comprising:

• obtaining predetermined information relating to amount of printing materials for a tank attached to the printing apparatus;
• and
• determining an interchangeable tank to be provided from a plurality of types of interchangeable tanks based on the predetermined information obtained in the obtaining,
• wherein the plurality of types of interchangeable tanks include a first tank and a second tank,
• the first tank contains printing materials of at least two colors, with a ratio of amounts of the printing materials of the at least two colors being a first constituent ratio, and
• the second tank contains printing materials of at least the same two colors as those in the first tank, with a ratio of amounts of the printing materials of at least the two colors being a second constituent ratio different from the first constituent ratio.