Dr. Mark MacLachlan’s lab has developed an innovative material to combat counterfeiting by concealing and revealing information. The material features multiple layers, including a cellulose nanocrystal film and graphene oxide, forming a pressure-responsive system that remains blank until pressure is applied. Upon heat-pressing, a hidden pattern emerges, and even after the heat is removed, the pattern remains intact. This approach offers a powerful and reusable solution for secure information encryption, providing an effective tool to prevent counterfeiting.