In the second half of the 19th century the printing processes were much improved from the tecnica point of view and consequently iy was possible to print colour images at low cost. They are known as cromo or chromolithograhies and were mainly destined to women and children.
Cats are among the most frequent subjects in this sector and soon the back of the card will be used for commercial advertisements.
In the same period another product is created, which will become extremely popular until the seventies in the 20th century : the pictures which, loose or collectable in special albums, were sought after by children and boys.