Like poker cards, Mahjong tiles can also be marked by infrared invisible ink. We usually mark Majong tiles on one, two or three sides. There is no chromatic aberration between the original Mahjong tiles and the processed ones. Besides, the marked Mahjong tiles are not sticky with the infrared ink on their backs, giving you the original hand feel.
Those infrared marks are invisible to human naked eyes and they can only be seen by wearing infrared contact lenses or sunglasses, both of which are also available from our company. So, if you want to use our infrared ink marked Mahjong tiles to cheat at Mahjong games, don’t forget about the infrared contact lenses or infrared sunglasses.