Cast with R&R®
Glass-Cast™ 910 investment


Pictured above:
Silicone Mold
Original | Wax Pattern
Glass Casting

Glass Casting Process

EvangelineJohn-MulkinsBorn of IceTsaarAbalone

The glass casting process involves the creation and use of plaster-based molds. Using plaster-based molds for glass casting is an art. A variety of processes can be used to accomplish this feat; however, the two most common methods for making plaster-based molds are open-faced molding and lost wax casting.

In both methods, the mold itself is used only once. A plaster-based mold material is mixed with the appropriate percentage of water to create a slurry. This slurry is then poured around the pattern and allowed to set or harden. After proper curing, the pattern is removed by pulling it from the mold, by steam removal, or by heat removal. After the pattern is removed, the glass can be placed in the mold.

The method of glass placement varies from artist to artist based on preference and experience.

Open-Faced Molding Method

Open-faced molding is more commonly used where one side of the final piece is flat or for less intricate pieces and involves pouring plaster around a pattern that can physically be removed once the plaster sets.

Lost Wax Casting Method

Lost wax casting is more commonly used for three-dimensional or more intricate pieces where the pattern cannot be easily removed by hand (requires the removal of the pattern by heat or steam) and involves creating a rubber master mold of an original piece of art.

Pictured above (L to R):
Ron Reisman – Evangeline
| John Mulkins | Nestor Mirabal – Born of Ice | Hugh McKay – Tsaar | Robin Lehman – Abalone