Printing system, method of recording images, and ink cartridge attachable to printing system

A printing system having a head for recording at least three different color inks, which are mixable to express hues in a predetermined range, on a printing object,

• wherein a density ratio of a specific color ink, which has lowest conspicuousness of granularity against a fixed recording ratio among said at least three different color inks, to the other color inks is determined, in order to enable a color balance to be biased to said specific color ink having the lowest conspicuousness of granularity in case that said specific color ink and the other color inks have an identical recording ratio per unit area,
• said printing system comprising:
• correction means for correcting a recording amount of said specific color ink having the lowest conspicuousness of granularity to a level that cancels said bias.

A method of recording a multi-tone image by controlling a head that is able to record at least three different color inks, which are mixable to express hues in a predetermined range, and regulating a distribution of dots formed by said at least three different color inks based on tone signals regarding an original image to be printed, said method comprising the steps of:

• determining a density ratio of a specific color ink, which has highest lightness against a fixed recording ratio among said at least three different color inks, to the other color inks, in order to enable a color balance to be biased to said specific color ink having the highest lightness in case that said specific color ink and the other color inks have an identical recording ratio per unit area;
• and
• correcting a recording amount of said specific color ink having the highest lightness to a level that cancels said bias.

A method of recording a multi-tone image by controlling a head that is able to record at least three different color inks, which are mixable to express hues in a predetermined range, and regulating a distribution of dots formed by said at least three different color inks based on tone signals regarding an original image to be printed, said method comprising the steps of:

• determining a density ratio of a specific color ink, which has lowest conspicuousness of granularity against a fixed recording ratio among said at least three different color inks, to the other color inks, in order to enable a color balance to be biased to said specific color ink having the lowest conspicuousness of granularity in case that said specific color ink and the other color inks have an identical recording ratio per unit area;
• and
• correcting a recording amount of said specific color ink having the lowest conspicuousness of granularity to a level that cancels said bias.

An ink cartridge attachable to a printing system having a head for recording at least three different color inks, which are mixable to express hues in a predetermined range, on a printing object,

• said ink cartridge comprising said at least three different color inks, which are mixable to express hues in the predetermined range and stored therein,
• wherein a specific color ink having highest lightness against a fixed recording ratio among said at least three different color inks has a dye density higher than a balancing density that ensures a color balance in case that said at least three different color inks have an identical recording ratio per unit area,
• a volume of said specific color ink stored in said ink cartridge being not greater than a volume of each of the other color inks.

An ink cartridge attachable to a printing system having a head for recording at least three different color inks, which are mixable to express hues in a predetermined range, on a printing object,

• said ink cartridge comprising said at least three different color inks, which are mixable to express hues in the predetermined range and stored therein,
• wherein a specific color ink having lowest conspicuousness of granularity against the fixed recording ratio among said at least three different color inks has a dye density higher than a balancing density that ensures a color balance in case that said at least three different color inks have an identical recording ratio per unit area,
• a volume of said specific color ink stored in said ink cartridge being not greater than a volume of each of the other color inks.