Scientists have developed UV-activated ink that lets people hide tattoos until needed, offering a new option for those undergoing radiotherapy.
New tattoo ink discovered
Researchers from the University of Colorado in the United States have developed a new type of tattoo ink that is transparent most of the time and becomes visible only under ultraviolet light. This innovation offers a potential alternative to traditional tattoos, which are permanent and cannot be easily altered or removed.Ink activated by UV light
The new ink remains invisible under normal lighting conditions but becomes visible when exposed to ultraviolet light. This feature allows individuals to hide their tattoos when they want and reveal them only when desired, offering greater flexibility and privacy compared to conventional tattoos.Potential use in medical treatments
The technology was presented on October 9, 2026, in the journal Matter & Light. One of its primary applications could be in the medical field, particularly in helping patients undergoing radiotherapy. The ink could be used to mark areas for treatment, which are often visible but not preferred by patients.Concealment before radiotherapy
This new ink could allow individuals to conceal tattoo markers before radiotherapy, which are used to help doctors target cancer treatments more precisely. Patients may find these markers intrusive or uncomfortable, and the ability to hide them could improve their experience during treatment.
