The present invention is drawn to photo-curable ink-jet ink compositions, systems, and methods. The endoscope contains a memory 670 with data that describes the endoscope and its operating characteristics. In another configuration, the buffers’ outputs independently drive first and second external transistors. 7; the amount of polyether-modified silicone with respect to \u03b1-olefin oligomer is 2 to 10 times in mass; the amount of perfume is 3 to 30% by mass in the composition; the amount of lower alcohol having 1 to 4 carbon atoms is 50% by mass or more in the composition; the amount of water is 3.