If it is difficult for you to see luminous ink marks with marked cards contact lenses? We are here recommending you to use leather belt poker camera to read the cards.
Back infrared poker camera reader is very important for casino and club. Wall painting IR marked cards lens is one kind devices for scanning marked decks.
X ray glasses are processed with special wave band, so that you can see through playing cards but you cannot see through cards poker by your naked eyes directly.
GS marked cards factory is also luminous ink suppliers, which specially wholesale cards marking ink, juice marked decks and invisible ink glasses, etc.