--- title: "University of Colorado Boulder Researchers Develop Invisible Tattoo Ink" url: https://newscentral.site/university-of-colorado-boulder-researchers-develop-invisible-tattoo/ language: en publisher: "News Central Site" section: "Science" published: 2026-10-30T21:00:04.000Z updated: 2026-10-31T13:59:49.517Z id: 2fd22b8d-d415-483d-b3c3-aa758997d195 source: "Phys.org https://phys.org/news/2026-10-chemists-tattoos-science.html" attribution: "Link to https://newscentral.site/university-of-colorado-boulder-researchers-develop-invisible-tattoo/ and name News Central Site when you quote or summarize this story." --- # University of Colorado Boulder Researchers Develop Invisible Tattoo Ink Researchers at the University of Colorado Boulder have made significant progress in developing invisible tattoo ink that can be revealed with a UV flashlight. This breakthrough has the potential to revolutionize the way we think about tattoos, making them versatile and adaptable to various situations. The new ink is designed to stay visible until it is intentionally switched off with white light. This means that individuals can control when their tattoos are visible or hidden, offering a level of discretion previously unimaginable in the world of body art. The versatility of this technology could have far-reaching implications for those who wear tattoos. To create these innovative tattoos, researchers used photochromic dyes, which change color when exposed to light. These compounds have been employed in various applications, including sunglasses that adjust to changing lighting conditions. By harnessing the power of light, scientists can manipulate the properties of molecules at a chemical level. The new tattoo ink has been tested with diverse motifs, ranging from simple designs to intricate patterns like multicolored scales. One notable example is a lantern-inspired design that reveals its light when activated by a UV flashlight. These designs demonstrate the potential for photochromic dyes to create dynamic and interactive tattoos. While this technology holds great promise, further research is needed to refine and perfect the process of creating these disappearing tattoos. Scientists will continue to explore the properties of photochromic compounds and their applications in various fields, including art and design. When exposed to bright ultraviolet light, the "invisible" tattoo ink undergoes a chemical transformation that reveals its color. The process involves the formation of a new ring within the dye molecule, which triggers a switch from a colorless pigment to a colored one. The availability of various colors depends on the specific molecular structure of the compound used in the ink. This allows for a range of hues to be created, catering to individual preferences or artistic visions. In contrast, a brief blast of bright white light can reverse the reaction, breaking the ring and restoring the colorless state. This process is reversible, enabling the tattoo to change color at will. One challenge facing this technology was the stability of the colored form of the dye. It tended to revert to its original colorless state, especially in warmer temperatures. The first commercially available switchable tattoo ink is a red pigment called Magic Ink, launched in 2024 by Hyprskn, a Colorado-based biotech company. The ink comes in a 2-milliliter vial and costs £77, which is significantly more expensive than regular tattoo ink due to the specialized dyes and formulation process required. The EU's Reach safety regulations have certified the Magic Ink as fully compliant with strict standards for chemical safety. This certification marks an important milestone for the development of switchable tattoos. However, researchers are already working on expanding the range of colors available with PhotoTat inks. Bruns' team has successfully developed blue, magenta and yellow inks that can be combined to create 16 different hues. While these new inks hold promise, challenges remain before they can be widely used. Direct sunlight poses a problem, as its UV radiation can activate the tattoos unless they are protected by sunscreen. Indoor light, on the other hand, will gradually switch off the tattoos over several days. The blue ink currently has a significant limitation: it degrades after only 10-100 activations, leaving behind a permanent purple mark. Furthermore, all PhotoTat inks require thorough toxicity and safety testing before they can be used in tattoo shops for general customers. This process is expected to take several years. The development of Magic Ink by Hyprskn has sparked a divided response within the tattoo community. Some enthusiasts see it as a groundbreaking tool for creative expression, while others view it as an overpriced novelty. However, the creator's vision extends beyond fashion; he envisions medical applications for photochromic tattoos, which could guide radiation therapy or mark biopsy sites on patients' skin. These markings can serve as permanent reminders of traumatic experiences, but by making them invisible once no longer needed, this aspect can be mitigated. This process is expected to take several years. --- Source: [Phys.org](https://phys.org/news/2026-10-chemists-tattoos-science.html) Published by News Central Site: https://newscentral.site/university-of-colorado-boulder-researchers-develop-invisible-tattoo/