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Ribbed bracelet

Original
 
Found: Balloerveld, Drenthe
Age: 1300-800 BC

Mould
 
Material: clay & sand, baken

The bracelets are basically ribbed flat plates, which are bend around. I don't believe these are cast in curved from. Therefore I decided to cast them flat, and bend them later. The mould is made from two flat plates of clay, one I carved the shape in after it was half dry.

Casting result
 
This type of bracelet I've cast before, in another mould. The previous example was too wide and too thick, and had a too high tin content. Especially because of the latter it was almost impossible to bend, and broke during bending. This time I adjusted the dimensions of the mould and used a lower tin content, around 10%. Lower then that is not prefered, as then it will become dull brown too quickly when worn. It's an ornament, so it has to shine as much as possible! The result so far is two succesful castings. I still have to wait to see if they survive the bending, but at least the bronze is a lot more ductile.

Finished bracelets
 
Here are the finished bracelets, including a third casting. For this, modern tools were used. After finishing, the bracelets were bend round.