There is disclosed a liquid ink comprising a photo acid generating agent that generates an acid upon irradiation with light, a coloring component, and at least one kind of a solvent that is polymerized in the presence of an acid. It is preferable that the amount of the photo acid generating agent contained...http://www.google.com.au/patents/US20030231234?utm_source=gb-gplus-sharePatent US20030231234 - Liquid ink and recording apparatus
