GS marked rummy
There's a famous magic show that the magician has the ability to read any rummy card that others choose from the pile. People think that the magicians use his own mind power to read the cards and feel very amazing and great. In fact, it isn't the mind power but the infrared contact lenses and the invisible ink marked rummy work. It's just like the IR or UV lenses to read the marked poker cards.
The rummy, made in everywhere, made in China or imported from other countries, can be marked with invisible ink for special contact lenses to see. High quality rummy, imported from Israel, which is marked by number and color with a special matrix offering you high and clear visibility through the contact lenses.
The rummy tiles are marked so that they can be visible for IR contact lenses, but not for the naked eye. The mark can be read using either IR contact lenses or IR glasses. With such a set of marked rummy, the player can see the luminous marks of every card and get the good advantage to be unique winner.