The polymeric coatings for the “vitrification” of the food tanks, since for their function they are subject to direct and continuous contact with foodstuffs, they must necessarily meet specific requirements that are governed by European directives subsequently transposed into our legislation by specific Ministerial Decrees. The Decree “Father” of all Decrees is that of 21/03/73 “Hygiene rules on packaging, containers, utensils, intended to come into contact with foodstuffs or personal use substances “which has had a number of upgrades since 1973 to date (about 45). The vitrifying products we use, once dried and completely polymerized, fall within the definition of plastic material as defined by D.M 21/03/73 and subsequent updates.