Sample card of blue printing: double-sided printed cardboard with white pattern. 1st front side: area horizontally divided into two fields – in the upper part identical stylized flowers (stem with two flowers) with blue shading, diagonally arranged, in the middle on top the number 711 is attached. In the lower part of the area, two types of stylized, partially dotted flowers with blue shading are alternately diagonally arranged in the area. Number 712 is attached on the right. 2nd back side: area divided horizontally into two fields – in the upper part diagonally arranged identical stylized large “teasel-like flowers with blue shading, in the middle on top the number 713 is attached. In the lower part, large “double flowers” with dotting and blue shading symmetrically distributed in the area. Number 714 is attached in the middle.