There are so many types of cards, but the Copag cards are probably the finest.
The advantages of these cards are that they are jumbo index sized and are made of 100 % plastic. These characteristics are turning them into the cards you can use for years.
The back designs of the Copag marked cards are in different colors. Actually the back color determines the marks. The marks can be UV and IR.
The light colored cards are marked with big letter or number in the middle, or with small fonts in the corners. The marks are also in different colors. You can find the red cards with black or white marks.
The dark colored cards are usually marked just with a big font in the middle. And the ink used for the marking is white.
It is known that the performance of the light colored marked cards is usually better than that of the dark colored marked cards.