The longevity of purple tattoo ink without fading can vary depending on various factors, including the quality of the ink, the tattoo artist's technique, and how well the tattoo is cared for. Generally, high-quality purple tattoo ink can last many years without significant fading if proper aftercare is followed. However, it's important to note that all tattoos will naturally experience some degree of fading over time due to factors like sun exposure, skin aging, and the body's natural healing processes. To maximize the lifespan of a tattoo and minimize fading, it is crucial to protect it from prolonged sun exposure, moisturize the skin regularly, and follow the aftercare instructions provided by the tattoo artist.