Fluorescent inks are special types of inks that glow brightly under ultraviolet (UV) light. They contain fluorescent dyes that absorb UV light and re-emit it at a longer wavelength, creating a vivid, eye-catching effect. These inks are often used in various applications, including printing, packaging, and security features for documents. These inks can be found in many products, such as highlighters and posters, making them popular for both artistic and practical uses. Their bright colors and ability to stand out in low-light conditions make them useful for attracting attention and enhancing visibility in various settings.