Kolinsky refers to a type of weasel found primarily in East Asia, particularly in regions like Siberia and China. Known for its rich, reddish-brown fur, the Kolinsky is highly valued for its soft and durable hair, which is often used in high-quality paintbrushes. The fur of the Kolinsky is especially prized in the art world, as it holds paint well and provides excellent control for artists. Brushes made from Kolinsky hair are considered superior for detailed work, making them a favorite among professional painters and calligraphers.