 With the main factory unable to cope with demand, another was set up at Mundelsheim in 1910.A new product was added to the Amann range in 1919 with the manufacture of schappe silk (silk waste) and in 1921 an extension was built to house the colour dyeing plant.The latter was overseen by Johannes Mecheels, whose son, Otto Mecheels, went on to establish the Hohenstein Institute, a textile research centre situated at the edge of Bönnigheim.