Patent ID: 8262215

Claim:
A dot omission inspection method of inspecting for the existence of an omission of a dot, used in a printing apparatus which discharges a first photo-curable ink and a second photo-curable ink from respective nozzles to be landed on a medium as liquid droplets and irradiates the landed liquid droplets with light to be cured so as to form an image constituted by fine dots on the medium, wherein the printing apparatus selectively performs, as a process of forming the image, a normal print process of forming an arbitrary image and an inspection print process of forming an inspection image as a detection object for a dot omission, wherein the normal print process includes: performing liquid droplet discharge of causing the liquid droplet of the first or second photo-curable ink to be landed on the medium; performing provisional curing of irradiating the liquid droplet landed on the medium using light from a first light source to provisionally cure the liquid droplet so as to suppress flowing of the liquid droplet; and performing main curing of irradiating the provisionally cured liquid droplet using light from a second light source to cure the provisionally cured liquid droplet so as to be fixed on the medium, and wherein, in the inspection print process, the provisional curing is not performed on the liquid droplet of the first ink landed on the medium by the liquid droplet discharge, and the liquid droplet of the second ink is landed by the liquid droplet discharge at the same position as the liquid droplet of the first ink which is not provisionally cured so as to mix the first ink and the second ink with each other.