Plaster Molds
George Segal plaster sculptures of people!
George Segal
Plaster molds are made from an oil based clay called Plastilina
Since Plastilina is oil based it never dries out!
Perfect for carving and making sculptures
Sculptors sculpt (form) the object they want to cast
Sculpture is three-dimensional artworkthree-dimensional
You can view it from all sides
After the sculpture is made
The artist makes a plaster mold
Plaster starts as a dry powder similar to mortar or cement mortarcement
It’s mixed with water to form a paste
which liberates heat and then hardens.
Next step
The artist makes a wooden frame and puts the Plastilina sculpture in the wooden frame
The artist then pours the plaster around the sculpture
After the plaster dries The artist pulls the plaster away from the clay
This leaves a negative space- A plaster Mold!
After making a mold The artist can fill it with clay/other materials and re-use it many times
This is how doll heads are made !
And poly resin molding for homes (trim work )
If the artist uses only one side of the mold he is making a Bas-Relief
A bas-relief is when you can only see one side (for viewing) when the piece is completed
If the artist uses both sides of the mold he/she is making a Sculpture
Vocabulary
Plaster mold Plaster Plastilina Bas-relief Sculpture Cast three-dimensional three-dimensional
Wedge slab under glaze kiln
Steps: 1. wedge clay 2. flatten clay into a slab 3. press clay into plaster mold 4. pull clay away from plaster mold 5. trim edges 6. cover with plastic 7. glaze using under glaze 8. give to me for firing in kiln