The term latten referred loosely to the copper alloys such as brass or bronze that appeared in the Middle Ages and through to the late 18th and early 19th centuries. It was used for monumental brasses, in decorative effects on borders, rivets or other details of metalwork (particularly armour), in livery and pilgrim badges or funerary effigies. Metalworkers commonly formed latten in thin sheets and used it to make church utensils. Brass of this period is made through the calamine brass process, from copper and zinc ore. Later brass was made with zinc metal from Champion's smelting process and is not generally referred to as latten. This calamine brass was generally manufactured as hammered sheet or "battery brass" (hammered by a "battery" of water-powered trip hammers) and cast brass was rare.