Invisible ink, also known as security ink, is a substance used for writing, which is invisible either on application or soon thereafter, and which later on can be made visible by some means.Invisible ink is also applied into card marking. With our special contact lenses or sunglasses lense, you can see the invisible ink marks on the paper or plastic cards while It is totally invisible for naked eyes.
Several kinds of ink are available here. Using different kind of ink, you can marks different cards.
But the marks can not last only from 10-15minutes.
luminous invisible ink is not the best choice for professional players.
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