Viscofan is a Spanish manufacturer of casings for meat products, with commercial presence in over 100 countries around the world. It is the only world producer with the capacity to manufacture the four main technologies available on the casings or artificial casings market. Its complex production process is based on the physical and chemical treatment of the raw materials, which, through mechanical or physical-chemical rupture and later homogenisations and mixes, become a mass that can be extruded in the production process. The extrusion operation is performed by pressing the mass, either through a ring or through a slot. This way, smooth casing is produced that can later be rolled onto spools or rolls and that can undergo a series of transformation processes, among which particularly noteworthy is the tripe pleating and occasionally its printing and closure; all to facilitate its storage and later distribution in the form of sticks, so that clients can use them easily in their cold meat production machinery. The company has been trading in the Madrid Stock Exchange General Index since December 1986 and is a former component of the IBEX 35. Wikipedia