Italian Napoletane marked playing cards

Napoletane poker cards is one of the top quality playing cards in the poker gamble industry, which is originated from Italy. Here, we can mark marked Napoletane playing cards with 100% manufactured cards and best playing cards marking ink.
When working these special back marked Napoletane marked playing cards in poker games, the invisible ink markings on the backsides of Napoletane marked cards are concealed and others cannot find any different from their appearance between them and the regular one. However, if you working them with our contact lenses for playing cards or glasses used to detect invisible ink, you can see these secret.
After reading these invisible ink markings and know what cards you opponent have, is it a very simple thing for you to make a good bet or make a magic poker show?