Would you like to use invisible ink to mark poker cards? Actually anyone can use luminous ink to mark their own playing cards. First of all, you need to have the right luminous ink kit, which will come with the luminous ink, directions, red filter, and a fine tip paint brush to start you off.
What's more, the skills to mark cards is very important.
In the first place, use a practice card as the joker card. You would dip the fine tip paint brush into the luminous ink and wipe the side of the container so that the paint brush isn't soaking wet with luminous ink (you don't want to much on the paint brush). Next you make your markings on the card whether it is a number or a letter or a symbol. And wait a few seconds and wipe it off the card with a dry-to-damp paper towel or cloth.
The longer you wait the darker it will settle into the card. At some point the luminous ink will be so dark that it will be visible to the naked eye. So to find the perfect amount to use you would try wiping the card off at different second counts.