Original Ways to Mark Cards

(1) Blocking-out or Tinting ink marks

​Block-out work is one of the most original ways to mark the poker playing cards simply using the same color ink as the back of the card to color some small white areas in the back. It might possible make two think lines into one bigger one for showing the number or suit of the card. Tinting is a more subtle variation on blocking-out, card backs can be marked by lightly tinting certain areas of a detail. Rather than blocking out the entire petal on a flower detail, the petal is washed with a light ink of a similar color to the back patterns. For example, sometimes people add a little ink to the flowers or leaves by making the petals narrower or blocking out a bird on the back design. And some may write a small sign like the number that is not easy to see by others on a certain place of every piece of cards.
Since this special mark is small among the back patterns with the same color ink, they are difficult for others to see and they have also a name called code marked cards. Even some one notice the sign, they won't know what it is for without the code secrets.

(2) Cutting-out marking

​And for the cut-out work for marking cards, people sometimes use a razor or a needle to scrape off some of the printed areas of the card. The marks can be a simple point or line short and long on different places to show the numbers and suits. Usually these marks will be processed on a clean deck of paper playing cards. Plastic cards is not easy to get a good cutting-out marking. This mini marking is for naked eyes to see but people without training or practice are not able to see such marks.
From the right picture of cards marking, we can see a mini sign of markings on different points to show the number on every piece of cards. It's made by the technician with a needle.

(3) Shading juice marks

​This technique uses a tint solution to mark poker cards, but the marking patterns vary depending upon the design of the back, usually different brands and models cards have different back designs. This marks are only visible when a person is trained to read the marks. No infrared sunglasses nor lenses or other filters are required, but some practice is required to read the marks. This kind of marked cards always come out at the same time while the playing cards are produced and printed in large quantity.