Specialty inks are unique types of inks designed for specific applications beyond standard printing. They can include metallic inks, fluorescent inks, and invisible inks, each offering distinct visual effects or functionalities. These inks are often used in industries like packaging, textiles, and security printing to enhance the appearance or provide additional features. The formulation of specialty inks may involve various additives to achieve desired properties, such as increased durability, flexibility, or resistance to environmental factors. Their specialized nature allows for creative designs and practical solutions, making them valuable in both commercial and artistic endeavors.