When Mathis died in 1832, the direction of the furnace was taken over by the Bavarian, Giovan Battista Schmid, who was later to become the sole proprietor.
Prior to this, Schmid had worked first in Altare and then at the furnace in S.Vivaldo, near Montaione.
Under the guiding hand of the volatile Schmid, the Colle furnace was hugely successful, as became evident in the numerous Exhibitions in which it took part.
Here is a list of the most prestigious acknowledgements achieved, which became more and more important as time went by:

First Exhibition of Tuscan Art and Crafts, Florence 1841: first class gold medal. Public Exhibition of Tuscan Art and Crafts, Florence 1844: first class gold medal. Universal Exhibition, Paris 1855: gold medal. Italian National Exhibition, Florence 1861: gold medal.

Palace of the industry to the Universal Exhibition of Paris, 1855

Meanwhile, the business grew, thanks to the construction of a new plant behind the original one and the extension of the "Mulino di Fuori" (Outside Mill) on via Maremmana to make way for another grinding department.
Each of the two furnaces was equipped with 8 work "areas", each with its own crucible. The production cycle was extremely long, lasting ten months a year, from September to June, while most of the furnaces in Italy worked less than six months.