Lost Wax Casting

With advanced lost-wax casting and highest quality raw material, all our sculptures meet the art-quality standard in USA and Italy

Clay Model Making 1

Firstly we construct a steel frame called an armature to prop up the clay model.Then We will make the clay model according to the three dimensional sculptural image the customer send us.During this process,our clay model is made 100% based on customers’ request. This is the most crucial step during the whole casting procedure.The detail of the original must be appeared in the mold, if not, they will be difficult to replace in any other step.

Silicon Rubber Mold 2

The rubber mold is a reusable flexible mold that can be opened to remove the wax casting without damage to either the mold or the casting.
This mold is made by layering liquid rubber over the original which is built up into a rubber blanket about three eighths of an inch thick. A parting line is planned for the division of the mold. A flange of rubber is built-up marking that parting line. The mold will later be divided along the parting line allowing the wax casting to be made in the mold and removed from the mold without harm to the wax or the mold.

Wax Making and Chasing 3

Molten wax is poured into the mold to form layers of wax. This wax model is an exact duplicate of the original casting. Then the wax is pulled from the mold and hand chased (re-detailed) by a skilled artisan. Although the artist reproduces the original artwork, each piece may slightly differ from the next.
Wax rods (gates) and pouring cup are attached to the wax casting in just the right positions. This will assure a full pour.

Ceramic Shell Making 4

In a temperature controlled climate of 72 degrees Fahrenheit, the wax casting is dipped into Investment liquid several times. On the first dip a fine powder is applied. On the next dip of course, ceramic sand will be applied. This step is repeated several times, each increasing the coarseness of the material to create the ceramic mold. Between each dip, the ceramic layer must cure (dry) before nother layer can be applied.

Burn-Out and Casting 5

The ceramic shell is placed in a kiln and fired. The shell bakes and the wax is melted (lost) from the shell. This creates a hollow ceramic shell mold. Thus the term “Lost Wax.” Immediately the molten bronze is poured into the shell. At the time of pouring, the bronze is 2100 degrees Fahrenheit.

Shell Removing,Welding & Chasing 6

After the casting has cooled several hours, the shell is carefully broken away leaving the unfinished bronze.The final raw piece will be welded together. and the surfaces chased to match the original artwork.In this step,it should be very careful.Once the surface is damaged,it is difficult to be repaired.

Patina 7

patina is the chemical coloration of the surface of the bronze. The bronze will be sandblasted once more to even out the surface. It may be wire brushed, rubbed with steel wool or scotch bright,depending on the desired effect. Generally speaking the bronze will be heated with a torch and chemicals will be applied to the surface.The reaction of the chemicals on the heated bronze will deposit a layer of oxides on the surface of the casting. It is this layer of oxides that forms the patina. The use of different chemicals will result in different patinas. After the layer of oxides is complete, a coat of wax or lacquer may be applied to seal the patina from further oxidation.

Safe Package 8

After patina, the bronze sculpture is already finished then we will make strong packing(Inside with Soft plastic foam,outside:with strong fumigated wooden cases & iron Crate) for delivery.