The outbreak of the Spanish Civil War and the start of the series of 27 paintings on Masonite in Mont-Roig happened at the same time, pointing to a link between the two. The support medium is not an afterthought but a first-rate artistic component. Masonite is a neutral base that Miró combined with caseine, tar, sand bitumen and oil paint.
Miró imagined these paintings lined up like the frames of a movie, like a continuous frieze that allowed him to depart from the strict limits of the frame.
He experimented with different materials and hoped that the comparison with the work would make the viewer react.