How plaster is made

Gypsum plaster, also known as plaster of Paris, is a type of plaster that is made from gypsum, a soft sulfate mineral that is composed of calcium sulfate dihydrate. The process of making gypsum plaster involves several steps:

• Mining: The first step in making gypsum plaster is to extract gypsum from the earth. This is typically done by mining gypsum deposits, which are then transported to a processing plant.

• Crushing and Grinding: The gypsum rock is then crushed and ground into a fine powder. This powder is then stored in silos or hoppers until it is ready to be used.

• Calcination: The gypsum powder is then heated to a high temperature (around 150 to 160 degrees Celsius) in a process called calcination. This causes the water molecules in the gypsum to evaporate, leaving behind a powdery substance called calcined gypsum.

• Mixing: The calcined gypsum is then mixed with water and other ingredients such as fiber or additives to create the plaster. This is done in a mixer, which is a large machine that agitates the plaster until it reaches the desired consistency.

• Packaging: Once the plaster is mixed, it is packaged in bags or other containers and is ready to be used.

It is important to note that the gypsum plaster manufacturing process can vary depending on the manufacturer, and some may use different techniques or additives to improve the quality or properties of the plaster.

Gypsum plaster can be used for a variety of applications such as creating wall or ceiling finishes, casting molds, or even for medical uses. It's important to choose the right type of plaster and mix it properly according to the manufacturer's instructions. It's also important to be aware of the safety precautions when handling gypsum plaster, as it can be harmful if inhaled or ingested.