Ink composition refers to the mixture of various substances that create ink for writing, printing, or drawing. The main components typically include pigments or dyes, which provide color, and a solvent, which helps the ink flow. Other additives may include resins for adhesion, surfactants to improve spreadability, and preservatives to extend shelf life. Different types of ink, such as water-based ink, oil-based ink, and solvent-based ink, have unique compositions tailored for specific applications. For example, printer ink often contains fine pigments for high-quality images, while calligraphy ink may have a thicker consistency for better control during writing.