Porcelain sinks are made by molding clay and then firing it at high temperatures after being covered in a glaze, creating a durable, waterproof material. The video mentions porcelain is waterproof, smooth, glossy, durable and non-porous, which contributes to it being used for everyday use.
Here's a simplified overview:
- Clay Molding: A specific clay mixture is molded into the desired sink shape.
- Glazing: The molded clay is coated with a porcelain glaze. This glaze provides the smooth, glossy, and waterproof surface.
- Firing: The glazed sink is then fired in a kiln at very high temperatures. This firing process vitrifies the clay and glaze, creating the hard, durable porcelain.