Chromolithography.

Chromolithography is described as a process of using several stones, one for each color, printed in register. The result is a beutifull color print.
Chromolithography was the first fundamentally printing technology since the invention of relief printing in the fifteenth century. It was invented by Alois Senefelder in Germany in 1798.

Chromolithography is based on the chemical repellence of oil and water. Designs are drawn with greasy ink or crayons on specially prepared limestone. The stone is moistened with water, which the stone accepts in areas not covered by the crayon. An oily ink, applied with a roller, adheres only to the drawing and is repelled by the wet parts of the stone. The print is then made by pressing paper against the inked drawing.