We have been working with a wonderful casting company in Northern California for almost 15 years. They do beautiful castings in a variety of metals. The day we finished carving was one of the hottest days of the summer. And I worried that the waxes might be affected by the summer heat during transportation, but the gods were with us and they arrived intact.
To cast in the lost wax method, waxes are carefully attached or sprued to a treelike structure of wax that will eventually provide paths for the molten casting material to flow and for air to escape. The carefully planned spruing usually begins at base with a wax “cup,” which is attached by wax cylinders to various points on the wax models.
The sprue is not hollow, as it will be melted out later in the process. Shown below are you will find our waxes sprued to the trees. This is done right before they are placed in a flask and made ready for the plaster pour.