Ink, ink cartridge, ink discharge apparatus, ink discharge method, and cured product

1. An ink, comprising:

a radiation-curable compound;

a liquid matter which is incompatible with the radiation-curable compound and is dispersed in a state of droplets;

a solid particulate matter that is present in the droplets formed of the liquid matter; and

a surfactant, wherein

a content of the liquid matter is from 10% by weight to 50% by weight with respect to the total weight of the ink,

the solid particulate matter is a white solid particle, and

the volume average particle diameter of the droplets ranges from 0,1 μm to 1 μm.

2. The ink according to claim 1 ,

wherein the solid particulate matter is titanium oxide particles.

3. The ink according to claim 1 ,

wherein a content of the solid particulate matter is from 1% by weight to 70% by weight with respect to the total weight of the ink.

4. The ink according to clain 2 ,

wherein a content of the solid particulate matter is from 1% by weight to 70% by weight with respect to the total weight of the ink.

5. The ink according to claim 1 ,

wherein a content of the radiation-curable compound is from 50% by weight to 99% by weight with respect to the total weight of the ink.

6. The ink according to claim 1 ,

wherein a content of the surfactant is from 0.1% by weight to 50% by weight with respect to the total weight of the ink.

7. An ink cartridge that comprises the ink according claim 1 .

8. An ink discharge apparatus, comprising:

a discharge unit that comprises the ink according to claim 1 and discharges the ink; and

a radiation irradiation unit which irradiates the discharged ink with radiation to thereby cure the ink.

9. An ink discharge method, comprising:

discharging the ink according to claim 1 ; and

curing the discharged ink by irradiation with radiation.

10. A substrate coated with the composition of claim 1 .