Liquid container, ink cartridge, and liquid discharge apparatus

1 . A liquid container, comprising:

a first liquid container to contain a first liquid;

a second liquid container on one side of the first liquid container in a longitudinal direction of the first liquid container, wherein the second liquid container contains a second liquid different from the first liquid, and the second liquid container includes:

a transparent part visible from an outside of the second liquid container; and

a scale inside the second liquid container, the scale visible from the outside through the transparent part; and

a sensor to detect a frequency of a stirring operation of the second liquid in the second liquid container.

2 . The liquid container according to claim 1 , wherein the liquid container is an ink cartridge to store ink as the first liquid.

3 . The liquid container according to claim 2 , wherein the first liquid includes white ink.

4 . A liquid discharge apparatus, comprising:

the liquid container according to claim 2 , wherein the liquid container is attachably detachable from the liquid discharge apparatus; and

a liquid discharge head to discharge the first liquid supplied from the liquid container.

5 . The liquid container according to claim 1 , wherein the sensor detects a position of a liquid surface of the second liquid in the second liquid container.

6 . The liquid container according to claim 1 , wherein the second liquid includes oil.

7 . The liquid container according to claim 6 , wherein a viscosity of the oil is equal to or smaller than 2.42 mm 2 /s.