Luminous Marked Dominoes Made With Invisible Ink
There are many varieties dominoes in market, most of them are made of wood, tiles or plastic as well as bone. The size and quality will has different according to different games rules.
The dominoes are professionally marked so that they can be visible for IR contact lenses, but not for the naked eye. Due to the quality incredible ink solution and ultra luminous contact lenses or ultimate sunglasses, the marks can be read in any kind of light. There are many kinds of domino and all of them can be marked with different luminous invisible ink.
Different luminous ink has its own special way to detect, so your special marked juice dominoes only can be read by your own magic invisible ink contact lenses or ultra luminous sunglasses.