India Bonus Black Invisible Ink Marked Playing Cards here refers to the India Bonus playing cards with invisible ink marks on the back for infrared ink readers such as infrared glasses or contact lenses.
India Bonus playing cards are not 100% plastic playing cards, they are special paper cards which are sometimes narrow size with regular index. In fact, the Bonus cards produced in US playing cards company are plastic ones and usually used in others countries. And the India Bonus cards are paper and usually used in India, Nepal, USA and some areas nearby.
India Bonus Black Invisible Ink Marked Playing Cards always have special marks on the back, which is different to other marked cards with big marks or small marks, because of the special back design and patens. Usually our technicians may test these cards with different markings modern so as to choose the best one for the special cards.
For marking the India Bonus cards to make Black Invisible Ink Marked Playing Cards, We need to coated with a layer of film on the surface of India Bonus playing cards before making the invisible ink marks backside India Bonus playing cards. And the technicians will adjust the most suitable ink to mark the cards by the playing cards marking machine. We need to wear UV invisible ink marked cards contact lenses or infrared luminous marked decks glasses to see juice markings.