Proof the sterile package was never opened.
Intelligent Material goes into the adhesive that seals the Tyvek lid of surgical packaging, at about 0.001%. A reader checks the seal and shows whether the package has been tampered with.
That is a bigger question than "is this genuine?" It tells the operating room that the scalpel inside has not been exposed and is still sterile. Readers are now being distributed to hospitals.
Inks and coatings
Plastics
Fibers
Labels and holograms