Bronze medal making class started at the last Thursday at Central Technical School in Toronto.
33 hours for making bronze medal step by step. The first step is to make a plasticine model of front and back sides.
Here they are. My first experience in this sculpting technique. Medal sides made of sculpting Roma plasticine.
The next step is to make a plaster mould:
Make a clay board around the plasticine model.
The hight of the board is 1/4″ above the highest point of your medallion sculpture and the thickness is about 1/2″.
You need 1/2″ of empty space around the plasticine model
Make sure the outside walls of the clay board do not have any opening at the bottom.
Water-down small amount of clay and apply it on the surface of the free space around the model.
Give it to dry a little and pour plaster on it
That what we have when the plaster mould is dried out
The next step is to make a wax model.
Before pouring wax into the plaster mould you need to soak the mould in water for 10-30 min to let the bobbles come off
Start pouring wax from the deepest point in your plaster mould and let it harden.
Then put the plaster mould with the wax into water again and take the wax model out gently
Clean out the wax model to prepare it for bronze.
At this step you have the opportunity to add some details or make the undercuts to increase the relief of your medallion sculpture.
nk-atelier 