Printing apparatus, control method, and storage medium

A control method of a printing apparatus including a printing unit configured to eject a color material ink and a reaction liquid containing a component that reacts with a color material contained in the color material ink and a controller configured to control the printing unit such that the printing unit prints a first test pattern in which a plurality of patches are arranged, the plurality of patches each printed by applying the color material ink and the reaction liquid ejected from the printing unit to an identical area, the plurality of patches varying from one another in an application amount of the color material ink and an application amount of the reaction liquid to each patch, the control method comprising:

• a first obtaining step of obtaining an optical density for each of the plurality of patches;
• a second obtaining step of obtaining a specular reflection intensity for each of the plurality of patches;
• and
• a step of generating correction information based on the optical density obtained in the first obtaining step, the specular reflection intensity obtained in the second obtaining step, a first target value of the optical density for a first input value of the color material ink, and a second target value of the specular reflection intensity for a second input value of the reaction liquid, the correction information being information in which a combination of a first correction value used for correction of the application amount of the color material ink and a second correction value used for correction of the application amount of the reaction liquid is held.

A non-transitory computer-readable storage medium storing a program that causes a computer to execute a control method of a printing apparatus including a printing unit configured to eject a color material ink and a reaction liquid containing a component that reacts with a color material contained in the color material ink and a controller configured to control the printing unit such that the printing unit prints a first test pattern in which a plurality of patches are arranged, the plurality of patches each printed by applying the color material ink and the reaction liquid ejected from the printing unit to an identical area, the plurality of patches varying from one another in an application amount of the color material ink and an application amount of the reaction liquid to each patch, the control method comprising:

• a first obtaining step of obtaining an optical density for each of the plurality of patches;
• a second obtaining step of obtaining a specular reflection intensity for each of the plurality of patches;
• and
• a step of generating correction information based on the optical density obtained in the first obtaining step, the specular reflection intensity obtained in the second obtaining step, a first target value of the optical density for a first input value of the color material ink, and a second target value of the specular reflection intensity for a second input value of the reaction liquid, the correction information being information in which a combination of a first correction value used for correction of the application amount of the color material ink and a second correction value used for correction of the application amount of the reaction liquid is held.