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Smart Adhesives with Multilevel Security Features for Real-World Anticounterfeiting Applications.

Anand P J1,2, Namratha Ullal2, Dhanya Sunil2

  • 1Manipal Technologies Limited, Manipal, Karnataka 576104, India.

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|January 19, 2026
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Summary

This study introduces novel security glues with hidden markers to combat manufacturing and publishing counterfeiting. These advanced adhesives offer verifiable, tamper-resistant features for product authentication, like ensuring book authenticity.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Forensic Science

Background:

  • Counterfeiting in manufacturing and publishing causes significant financial losses and brand damage.
  • Existing anti-counterfeiting technologies face challenges from advanced counterfeiting methods.
  • Adhesives are crucial but underexplored for anti-counterfeiting applications.

Purpose of the Study:

  • To develop novel adhesive formulations with integrated multilevel security markers.
  • To create a covert yet verifiable anti-counterfeiting solution for real-world applications.
  • To maintain the essential functional properties of adhesives while embedding security features.

Main Methods:

  • Hot melt adhesives were formulated with infrared (IR) emissive and up-conversion green phosphors.
  • Security features were tested under 980 nm laser light and 340 nm UV light.
  • Adhesive properties such as melting point, viscosity, and bonding strength were evaluated.

Main Results:

  • Secure adhesives exhibited distinct IR, greenish-yellow, and red emissions under specific light conditions.
  • Multisecure glues displayed bright green and pink emissions along with IR signals.
  • The embedded security markers did not compromise the adhesives' functional properties.

Conclusions:

  • The developed security glues offer a promising, tamper-resistant solution against counterfeiting.
  • These adhesives provide covert, verifiable features suitable for authenticating products like books.
  • The technology enables discrete verification by authorized personnel, undetectable to counterfeiters.