subota, 11. veljače 2012.

Copper Bracelets in Progress


Assortment of bracelets and tools
Above is a selection of bracelets made to date, and of some of the tools needed to make them. Once the outline is cut out, the copper form needs to be fixed to a lead block with broad-headed nails to hold it in place while you work. The lead block provides support to the metal, and allows it to move only where the punch is placed. When the copper form is removed after chasing, the lead has taken the form of the design and needs to be flattened with a heavy hammer before being used again.

Bird bracelet fixed onto lead block, in 'sketching' phase
 This is the second of the 'Bird' bracelets, fixed in place on the lead block. Once attached, outlines can be drawn with a felt-tip pen and then hammered in with the appropriate punches.

Bird bracelet sketched out
Punches can be entire forms (such as the flower motifs above), but more often they're lines or curves from which you build the outline you require. 

Bird bracelet
After the outlines have been punched, the ground is added with a texture punch. The deeper this is the better it looks, so I usually go over it a few times. The most difficult aspect of this stage is getting the textured ground even, as the punch is quite small and needs to be hit reasonably hard.

Sea Bird bracelet, with wave motifs
I decided to try a change in shape and motif, to see what's possible with the tools I have. The partial curves lend themselves nicely to waves and spirals, so I'm planning some more exploration along these lines while sticking with the bird/animal forms.

Fish bracelet, with wave motifs
For the second design in the 'wave' series, I wanted to introduce a fish/sea monster design, and had been thinking of the kinds of forms which appear in Australian Aboriginal art, and those from Chinese drawings. These fish are very loosely based on a combination of these styles.

Copper Bracelets

Cardboard pattern for bracelets

In order to progress, I've decided to stray a little from the form of the 'demonstration' bracelets, and lot from their design motifs. The first step of this process is to draw a new form, and make a cardboard pattern from which the copper shapes can be traced and cut. The first shape I'm trying is not vastly different from the demonstration shape; it's more rounded in the centre, so that a circle can be worked into the design, but is otherwise very similar.


Copper form traced from pattern

The copper form is cut from sheet with tin snips, and then filed to shape and deburred. I like to clean the copper surface with steel wool before beginning, in order to remove any oxides. It's much easier to do this now, while the piece is flat, and it means you can see your design more clearly as you work.

Finished bracelet with bird motif

This is how the chased bracelet looks. It still needs to be shaped, and the final finish (patina, lacquer) needs to be added, but the design work is now complete. The next post will show this process in more detail.










petak, 10. veljače 2012.

Traditional Bosnian Copperwork

The workshop has taken a change of direction lately; it's too cold for anodising (the chemicals have to be kept between 17 and 21 degrees Celsius, and right now the outside temperature ranges from -10 to -18), and I've been asked to teach a workshop on traditional Bosnian copperwork in the summer. Because my knowledge of traditional techniques is limited, I'm learning from one of the Masters in Bascarsija (the old part of town where the craftsmen have their shops). He's set me up with some tools and some copper, and a traditional design that I need to replicate 3 times, to keep me busy until the warmer weather returns.
 
Bracelet with traditional floral motifs, before shaping

The technique employed here is chasing, whereby designs are hammered into the copper using a series of customised punches. More information about technical aspects will appear in the next post.