The portraits of groups of workers taken at the factories and industries at the turn of the 20th century show the official portrait regarding workers, a series of images in which there is a significant presence of child labour.  The photographs in the collection of the La Maquinista Terrestre i Marítima metal company show personnel in the project rooms, in the building in Sant Andreu and the locomotives that they manufactured. Some of these images were published in the company magazine edited for the 1929 Exposition.

The collection belonging to the Benet Campabadal ribbon factory in Les Corts contained work-related photographs and documents from between the 1930s and 1950s, many of which were circulated at the time as a means of promotion. In the case of the Can Saladrigas textile factory in Sant Martí, an invoice paid to Lucien Roisin has been conserved, who was one of the most important photographers at the time and owned a postcard shop on La Rambla. It detailed an order for 23,000 postcards in 1913, which were widely circulated and included an image of the company.