The back designs of the Fournier No.12 cards are in two different colour patterns – red and blue.
The red cards are marked with big letter or number in the middle, or with small fonts in the corners. The marks are also in different colours. You can find the red cards with black or white marks.
The blue 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 red cards is usually better than that of the blue ones.
The Fournier No.12 cards are made of paper material, these are small indexed and the card size is 61*95 mm.
The deck usually contains 40 to 50 cards. There is a certifying guarantee card, as well.