The Rubber Mold – The Wax “Positive”

The Wax “Positive”

The metamorphosis of a sculpture from the original medium into bronze begins with a rubber mold. The original sculpture must remain stationary during the mold making process.

To accomplish this, half of the sculpture is nestled into a base of soft plasticine clay; the other exposed half is painted evenly with silicone rubber. When the half painted with rubber dries, a protective and rock hard “mother mold” made of reinforced plaster is built around the pliable rubber. The sculpture is then turned over and the process repeated.

When the second side is complete, the mold is opened and the original removed from within. The rubber is rejoined with the other half, rendering an exact “negative” rubber mold. A wax “positive” is then created.