How to Make a 2 Piece Core Mold: Concrete Urn Example
Step 2: Making The Clay Gasket
A 3/4'' (2 cm) thick clay bed is formed inside the marked area. Then the mold box is placed over the clay bed. Any voids are filled with additional clay and smooth out the clay bed using a rolling pin. There should be a smooth beveled edge around theperimeter.
Drill vent hole: Allows air to escape during mold making process. Make a clay gasket around the perimeter. Center the urn on the clay bed and firmly push the urn into the clay bed. Using a large paper clip, cut a registration key into the clay bed.
