Watercolor ink is a type of ink designed for use in watercolor painting. It is typically made from pigments suspended in a water-based solution, allowing for vibrant colors and smooth application. Unlike traditional inks, watercolor ink can be diluted with water to create lighter shades and washes, making it versatile for various artistic techniques. Artists often use watercolor ink with brushes or pens to achieve different effects. When applied to paper, it can produce soft, flowing lines or bold, defined strokes. This medium is popular among illustrators and calligraphers for its unique blending capabilities and expressive qualities.