When it comes to producing porcelain sculptures, selecting the right mold material is crucial for achieving fine details and durability. Here are the top materials used in mold-making for porcelain sculptures:

1. Silicone Rubber: Ideal for intricate designs, silicone molds offer flexibility and high precision. They are durable and can capture even the smallest details, making them a favorite among artists.

2. Plaster: A cost-effective option, plaster molds are commonly used for slip casting. They absorb moisture well, allowing for smooth porcelain casting, though they may wear out faster than silicone.

3. Polyurethane Resin: Known for its strength and longevity, polyurethane resin molds are resistant to wear and tear, suitable for repeated use in mass production.

4. Ceramic Shell Molds: Used in advanced techniques like ceramic shell casting, these molds withstand high temperatures and are perfect for creating hollow porcelain sculptures.

5. Alginate: While less common for porcelain, alginate is used for quick, temporary molds due to its fast-setting properties.

Each material has its advantages, so the choice depends on the project's scale, detail requirements, and budget. For high-end porcelain sculptures, silicone or ceramic shell molds are often preferred for their precision and durability.