SUSAN LEYLAND

     
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                                                           Bronze Making                   

 

We can see the metal armature and paper cut-outs of the desired future sculpture are ready. 

I then created the volume of the horses’ bodies with newspaper and tape.

  

Here the sculpture is beginning to take shape but it still has a long way to go.  

This is the finished clay model photographed before taking it to the foundry.

At the foundry the clay horses were sprayed with a sealer.  Then a rubber mould compound was painted on in layers.  An outer mould, dividing in two parts, was made in plaster. The clay model is discarded. The inner rubber mould is cleaned and coated in hot wax of a certain thickness creating a hollow wax replica of the clay horse.

Hot wax was poured in and out of the rubber mould, coating the sides until the correct thickness is obtained.  We can see in this photo the hollow wax model horse lying in the open mould.

The wax horses were hand-chased by me to obtain all the desired detail.

Here we see the horse model.  It has been filled and covered with investment, a ceramic mixture, which hardens when fired.  The pins hold the inner and outer investment together when the wax is melted in the furnace so leaving the space for the bronze - this is called the lost wax method .   The molten bronze was then poured into the empty cavity.

The investment was removed from the inside and outside of the bronze sculpture.  It was sandblasted and had the runners removed and the hole for the inside ceramic was closed.  All the work on the metal was done by me with the helpful guide of the foundry staff.

The bronze was sandblasted again and washed with a chemical solution starting the oxidation progress.  A hot propane torch  flame was blown onto the bronze and together with the patina chemicals created the final colour which was a rich brown with grey/green overtones.

 Susan Leyland 
 
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