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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 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 hammers) and cast brass was rare.
"Latten" also refers to a type of tin plating on iron (or possibly some other base metal), which is known as white latten; and black latten refers to laten-brass, which is brass milled into thin plates or sheets.
The term "latten" has also been used, rarely, to refer to lead alloys. 
In general, metal in thin sheets is said to be latten such as gold latten; and lattens (plural) refers to metal sheets between 1/64" and 1/32" in thickness.
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- Edge, David; Paddock, John Miles (1996) . Arms and Armour of the Medieval Knight. London: Saturn Books.
- Random House Webster's Unabridged Dictionary (1998, 2nd edition)
- The Oxford English Dictionary (1989, 2nd edition)
- Webster's Third New International Dictionary (1986)
- Joan Day, Bristol Brass
- Funerary crozier of the Bishops of St Davids, on display at St David's Cathedral, West Wales
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