Patent ID: 8534820

Claim:
A method of ink jet recording performing recording comprising the steps of: forming a recording part by ejecting a colored ink that comprises a coloring agent on a recording medium using an ink jet recording system; forming a determining part by ejecting a clear ink that does not comprise the coloring agent on a part of the recording medium that is different from the recording part of the recording medium using the ink jet recording system, wherein the clear ink comprises a luminescence marker that emits light by oxidization and the luminescence marker is at least one of luminol and lucigenin; oxidizing at least part of the determining part of the recording medium using an oxidant; determining that the clear ink comprises the luminescence marker if the determining part of the recording medium emits light by oxidation; and determining that the clear ink does not comprise the luminescence marker if the determining part of the recording medium does not emit light by oxidation.