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Best invisible ink Mahjong

Invisible ink marked mahjong has the same function with the back marked luminous cards. So when you use this invisible marked Mahjong, you just need to wear a pair of infrared contact lenses that can see through invisible ink markings.
Invisible marked Mahjong is very popular among gamblers. Because invisible ink to marking Mahjong is the easiest way to cheat in Mahjong gambling. If you know your opponent well, the winning chance will increase largely.