A plaster cast is a hard protective covering made from a mixture of plaster and water. It is commonly used in medicine to immobilize broken bones or injured limbs, allowing them to heal properly. Once applied, the plaster hardens quickly, forming a rigid shell that keeps the affected area stable. Plaster casts can also be used in art and sculpture to create detailed replicas of objects or body parts. Artists often use them to capture intricate details, and they can be painted or finished in various ways. This technique has been used since ancient times, showcasing the versatility of plaster in both medical and artistic fields.