What kind of material is use to cast a mold of a human face?

To cast a mold of a human face, a common material used is alginate, which is a safe, flexible, and skin-friendly substance derived from seaweed. Alginate captures fine details and sets quickly, making it ideal for facial molds. For added strength and durability, a plaster or fiberglass shell can be applied over the alginate once it has set. This combination allows for accurate reproduction while ensuring the mold can be reused for casting.