Encouraged to devote himself to painting by Lorenzo Delleani, after having studied at the Accademia Albertina, Giuseppe Bozzalla - grandson of Quintino Sella - continued to attend his first teacher, proudly declaring himself his favorite and most affectionate pupil, however he soon departed from him. for subjects treated and for the technique used: the snowy landscapes, almost completely absent in the painting of the Aniana, invade that of Bozzalla who prefers a technique made of small strokes of the palette knife to the energetic brushstroke of the master. If in Delleani it was light and color that triumphed, Bozzalla's works seem to be played on never violent shades and tones of color, almost evoking melancholy and nostalgic feelings. Among colors and vapors, a work of great commitment, in terms of size and pictorial conception, it was presented in Turin at the 1904 Exposition of the Promoter and had the honor of being reproduced in the Catalog: curiously in the photograph we note that the worker placed at the extreme right is represented with bare head, differently from the final version. After the exhibition, the canvas was purchased by Vittorio Emanuele III and transferred to Rome, at the Quirinale, where it remained until the institutional referendum of 1946. From that moment on traces are lost until the Biella anthology of 1960, where the work was exhibited as the property of Rodolfo Caraccio, a wealthy wool industrialist. With a testamentary disposition, Caraccio donated it in 1972, together with another work by Bozzalla - A Messa prima - to the Civic Administration of Biella who undertook to allocate it to the Civic Museum. It is in fact a realistic interpretation of the work linked to the dyeing of fabrics, a procedure that Bozzalla knew directly as the son of a textile industrialist. The scene, which takes place in a closed environment saturated with vapors, is set with an almost photographic cut and appears as the result of a rigorous research.