Liquid discharge apparatus

A liquid discharge apparatus comprising:

• multiple liquid discharge heads to discharge a liquid onto a medium, the multiple liquid discharge heads including:
• a first liquid discharge head to discharge a treatment liquid onto a region of the medium;
• a second liquid discharge head to discharge a color liquid onto the region of the medium to paint the region of the medium, on which the treatment liquid is applied by the first liquid discharge head, in a predetermined color, a coloring of which is affected by the treatment liquid;
• and
• a medium mover to move at least one of the multiple liquid discharge heads or the medium relative to each other;
• and
• circuitry configured to:
• cause the first liquid discharge head and the second liquid discharge head to form an evaluation chart on the region of the medium, the evaluation chart including patterns different in a combination of a first discharge amount of the treatment liquid and a second discharge amount of the color liquid;
• perform a setting of the first discharge amount of the treatment liquid with respect to the second discharge amount of the color liquid according to the coloring of the predetermined color in the evaluation chart;
• and
• cause the second liquid discharge head to discharge the treatment liquid onto the region of the medium based on the setting.