Sumi ink sticks, used in Japanese calligraphy, were the inspiration for the eyeliner shade. Shiseido MicroLiner Ink. They have una very thin tip to create una A truly precise line. With these eyeliners, you can easily reach even the spaces between your lashes. Thanks to thermosensory technology, the solid becomes liquid—similar to ink—upon contact with the heat of your skin. These eyeliners create an intense line of color that won't smudge, is waterproof, and stays perfect for up to 24 hours.