Marked domino is widely used in domino game. When you playing domino game with other people, have you considered using marked domino? Maybe we can help you because there are various marked domino in our company. We marked the luminous ink on the domino, and those invisible ink markings cannot be seen by naked eyes. Only you wear our IR contact lenses or perspective sunglasses, you can read the invisible markings of domino. Furthermore, we can print the unique marking on the surface of the domino if you have special requirement. When you use our marked domino in domino game, do not forget to wear our invisible ink contact lenses or IR glasses.