Sample card of blue printing: double-sided cardboard with white patterns. Front side: area horizontally divided into two fields: in the upper part covered with small stylized leaves in a diagonal arrangement. Number 608 pasted on the top right. In the lower part, stylized four-leaf flowers in horizontal stripes with dotted centers. Flowers are separated by dotted lines, with small dotted flowers in between. Number 609 pasted on the right. Back side: Area horizontally divided into two fields: in the upper part symmetrically decorated with horizontal stripes of dotted circles and four dots. Number 600 pasted on the top left. In the lower field, “checkered” decoration of identical stylized flowers in a diagonal arrangement, outlined by a “net” of double-row small leaves. Number 611 pasted on the left.