Cementation process in the 1740s. In the early modern period, brass, an alloy of copper and zinc, was usually produced by a cementation process in which metallic copper was heated with calamine, a zinc ore, to make calamine brass. Cementation process The cementation process is an obsolete technology for making steel by carburization of iron. Unlike modern steelmaking, it increased the amount of carbon in the iron. It was apparently developed before the 17th century. Derwentcote Steel Furnace, built in 1720, is the earliest surviving example of a cementation furnace. Another example in the UK is the cementation furnace in Doncaster Street,
Ore Mountain cuisine of potato are also common, the best-known is the so-called "Rauchemaad". At Christmas, which is especially richly celebrated in the Ore Mountains, many households still make "Neinerlaa". The ingredients vary from region to region, sometimes even from village to village. In any case, on Christmas Eve nine elements are served, for example, bratwurst, sauerkraut and lentils, each element supposedly having a special significance for the coming year. For example, dumplings stand for wealth and celery for fertility Ore Mountain cuisine Cuisine in the Ore Mountains was dominated for centuries by the changing economic circumstances of the mining, handicraft and forestry