Plaster waste molds
Waste molds are a very useful approach to transfer a work in clay to a stronger material. Waste molds are fast to make and inexpensive, but the end of the process your casted sculpture becomes the original since both, the clay and the mold are “wasted”
This image shows the clay work covered with plaster, this new layer will become the mold, capturing the sculpture in negative form.
In order to protect this layer of plaster we call “the mold” I like to add a supporting structure of metal bars. This bars need to be thought out then cut and bent to create the structure.
In order to distribute the weight and pressure equally throughout the mold this bars are joint to the plaster shell by using strips of burlap dipped in plaster.
Once our plaster mold is hard and dry all the pieces are detached from the original clay sculpture, all the clay needs to be removed to allow us to clean the inside of our mold.
In the picture we can see pieces of my mold casted with a thin layer of plaster followed by a second layer of burlap dipped in plaster. The burlap layer reinforces the plaster allowing for a lighter sculpture. Then all the pieces are taken apart, the clay is removed, the pieces then need to be clean and casted. I used plaster to cast.
After casting, all the pieces of the mold are put back together. the following step is to join all the pieces together from the inside, making sure that by the end no gaps remain and all is one single piece. Now all there is left to do is break the mold and reveal the work of art that hides inside.
Patina and Base making
The base is also an important part of the composition in my work. By making my own bases I have control over some very important elements such as the height at which my sculpture is displayed.
At last, we need to seal our original work to preserve it. By adding this last protective layer we have the choice of coloring our piece, this process is generally known within sculptors as Patination.