Begin with the object, not the furnace
A cast object begins as a design, model or pattern. Draft, undercuts, relief depth, intended mounting and final surface all affect how a foundry plans the work.
Lost-wax and sand casting are distinct families of practice. Museum references describe both, but selecting a route belongs to an experienced foundry after it has reviewed the object and material.
Positive, negative, positive
Many casting workflows move from a positive model to a negative mold and back to a positive metal object. Hollow lost-wax work can add cores, wax thickness decisions and a network of channels planned by the foundry.
The metal form normally needs further work after the mold is removed: gates may be cut away, separate pieces joined, surfaces chased and the object inspected.
Safety boundary
Molten metal, hot molds, dust, fumes and heavy loads can cause life-changing injuries. This article is not an operating guide. Casting should happen in a properly equipped facility under qualified supervision.
- Use training and a documented shop procedure.
- Provide task-appropriate ventilation and dust control.
- Use correctly selected protective clothing, face, eye, hearing and respiratory protection.
- Keep visitors outside controlled work zones.