Peu après la fermeture en 1838 du dernier « Commerce véridique », Michel-Marie Derrion (1803-1850) partira au Brésil pour fonder un phalanstère, l’Union industrielle du Sahy (1841-1845).
How to describe the Factory in a few words? A ‘canut’ replies: "The silk factory is similar to a very large and unique garden with an inexhaustible supply of water to meet all kinds of needs, and with the garden divided into portions, each with as many gardeners working as freely as plants or flowers" (Charnier). However, this garden and its harmonious operation were constantly threatened by parasites which, Fourierism was the first to identify as the merchant or trader. In Lyon alternative organisations for workers, both in terms of production and, above all, consumption, were being contemplated. "At the sound of the shooting" of April 1834, a merchant close to the workers, a republican, driven to fury, reflected on how to emancipate workers or, at least improve, their daily lives. He published a pamphlet, and at the turn of 1834-1835 a series of articles in L'Indicator setting out "Industrial Improvements" in order to spotlight his solution "finally to end social turmoil". He proposed a "social co-operative store" (« vente sociale d’épicerie »), the first example in France of a consumer cooperative, which would be called "To the truthful trade"(« Au commerce véridique ») . It was a seemingly modest project, but in Derrion's eyes, it was a first step in a reform that would end "free competition" - which he described as "a free for all where disorder, confusion, anarchy reigned, in which one struggles against everything, from fraud to bankruptcy, and in which everything serves either to enrich oneself or to ruin each other." In February 1835 subscriptions were opened in L'Indicator to form the first social fund and by this "truthful trade" to oppose the despotism of the merchant. The first cooperative store was opened a few weeks later and then six more followed until the severe economic crisis of 1837 put an end to the experiment. Shortly after the closure in 1838 of the last "Truthful Trade", Michel-Marie Derrion (1803-1850) left for Brazil to found a phalanstery, the Sahy Industrial Union (1841-1845).