As a leading marked cards manufacturer in China, GS have best marked cards kit for sale at home and abroad. Among them, the back marked cards is one of the hot sale products.
We mark the back marked cards with best invisible ink by stringent poker printer machine, there is no chromatic aberration between our back marked cards and the original playing poker cards. The invisible ink markings on the backside of back marked cards can be read by luminous ink glasses, like IR perspective sunglasses. There are various kinds of marked cards glasses for sale in our company, which are process with great strong frame and the lenses of them are created with the best infrared vision built in, they are so secret that others cannot find any difference between the perspective glasses and the original one.
The IR perspective sunglasses can be used in many poker games, like Texas Holdem, Baccarat, Omaha and so on. It is very convenient to use and let you know others cards directly.