Photocation-Curable Ink and Ink-Jet Recording Method by Using Photocation-Curable Ink

Abstract

The present invention is directed to a photocation-curable ink, an object of which is to improve the adhesion performance with respect to a recording medium without deteriorating the hardness of an ink coating film irrelevant to the type of a photopolymerization initiator. The photocation-curable ink according to the present invention uses a 2,2,6,6-tetramethylpiperidine 1-oxyl free radical or a compound including a 2,2,6,6-tetramethylpiperidine 1-oxyl free radical structure; wherein molar concentration of the 2,2,6,6-tetramethylpiperidine 1-oxyl free radical or the 2,2,6,6-tetramethylpiperidine 1-oxyl free radical structure in the ink is 19.6 mM to 39.2 mM. Accordingly, it is possible to obtain the photocation-curable ink having the high adhesion performance with respect to the printing medium.

Dependencies are inferred from the claim text.