A Roman relic made in chocolate using a food-silicone mold

A joint project between Lyon Central Engineering School and Elkem Silicones, using a silicone mold, to give Lyon students a ‘taste’ of history in chocolate

Claudius, Rome's fourth Emperor was born in Lyon in 10 AD, and was the first non-native of Rome to lead the Empire, from 41 to 54 AD, when he was assassinated. In 48 AD, at the height of his powers, he made a landmark speech to the Roman Senate, which was inscribed in bronze by the inhabitants of Lugdunum, the Roman name of the capital of Gaul, which was to become the modern city of Lyon, where Elkem Silicones is headquartered. Fragments of this historic relic, known as the Lyon Table in English and the Table de Claude (or Table claudienne) in French, can be seen at Lyon's Gallo-Roman museum. The Ecole Centrale de Lyon, the city's leading engineering school, thought it would be interesting to mold the bronze plaque fragments in chocolate. They were looking for a food-contact certified silicone to make a replica that would be used for teaching purposes and in particular to give children a 'taste' of the history of the Roman Empire in France.

Elkem Silicones immediately accepted this highly original idea as an excellent opportunity to support an interesting project in the company's hometown and to strengthen its partnership with Lyon's leading engineering school. It offered the project members a batch of Bluesil RTV 3428 A&B, a two component silicone elastomer, which cures at room temperature by polyaddition reaction, with the following features:

  • It is especially designed to reproduce the finest details and offers mechanical resistance and a long-life span for making multiple molds
  • It is widely used for molding objects in chocolate, sugar, marzipan and for decorative items in sugar-based treats, biscuits and confectionery products.
  • It can be used for food preparations when cured according to Elkem Silicones product handling instructions as the chemical composition complies with regulations in France (Journal Officiel, Brochure 122), Germany (BGA, chapter XV-A), the US (FDA Regulation CFR-2 1) and is in line with European Directive Guidelines (93/8/EEC). 

The partnership between Ecole Centrale de Lyon and Elkem Silicones was a great success for all parties concerned, with a great number of participants in the event and very positive reactions from students and other researchers for this original program to make history more attractive to people of all ages.

RTV 3428 A&B, which is the leading product of the range of food-contact silicones made by Elkem Silicones, proved it was perfectly adapted to the goals of the project. RTV 3428 A&B is available in three colors: white, transparent and pink.