How to make a wax tree(Jewelry)

Today， I went to the Foundry Workshop to learn how to prepare the pre-work of the metal casting of small items like Jewelry.

At first, cast the different sizes of stick wax that I need.

Then, make a metal traveler tube in the center to connect each of was items as well as a gas discharge tube on the side.

Finally， create a closed space to fill the mixed material plaster.

Waiting for the final work, the technician said it will take around one month to take the metal work.