Duyvis is specialized in engineering, producing and installing processing machines for the cocoa and chocolate industry. Wiener and Duyvis engineers, start-up technicians and process development experts joined forces and are working side by side to guarantee process and product innovations. The integrated laboratory in Koog aan de Zaan is available for testing food products in general and cocoa, chocolate, cream and compound. Many manufacturers of compounds, coatings, bread spreads and fillings have relied upon a wide variety of production methods, based on the recipes used, volumes required and fineness, viscosity and texture of the end products. The conventional manufacturing system starts with a premixer, 2-roller refiner, 5-roller refiner and a mixer/conche. Trade in Italy from LMD, the Choc Line include: Choc 425, batch capacity up to 1000 kg, grinding capacity up to 425 kg/hr; Choc 600, batch capacity up to 1000 kg, grinding capacity up to 600 kg/hr.