Hero Arts - Unicorn White Reinker Hero Arts Unicorn White Pigment Reinker is a white opaque ink offering fine detail, perfect for everyday stamping and crafting. This reinker works with our cubes or full-sized pads to replenish their vibrancy. Our reinkers also work well right out of the bottle for painting, watercoloring, or other inking techniques. 0.5 ounce of archival, acid-free ink.