Tattoo ink is a specialized pigment used to create designs on the skin through the process of tattooing. It is made from a combination of colorants, carriers, and additives. The colorants can be organic or inorganic, while the carriers help to deliver the pigment into the skin and may include water, alcohol, or glycerin. The safety and quality of tattoo ink can vary significantly. Some inks may contain harmful substances, leading to allergic reactions or skin irritations. Regulations regarding tattoo ink differ by country, with some places enforcing strict guidelines to ensure consumer safety and product quality.