1. A printing apparatus comprising: a head section which discharges a color ink which is curable by irradiation of light and a clear ink which is curable by irradiation of light; an irradiation section which irradiates the light; a setting section which sets a target glossiness to be used as target; and a storage section which stores a relationship between a total amount of color duty which is related to an amount of the color ink which is discharged per unit region and clear duty which is related to an amount of the clear ink which is discharged per unit region, and glossiness of an image which is printed using the color ink and the clear ink which have been discharged, wherein the head section changes an amount of the clear ink which is discharged onto a medium according to the target glossiness, the relationship between the color duty and clear duty, and the color duty of the image.