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Related Experiment Video

Updated: May 12, 2026

A Two-Step Pyrolysis-Gas Chromatography Method with Mass Spectrometric Detection for Identification of Tattoo Ink Ingredients and Counterfeit Products

A Two-Step Pyrolysis-Gas Chromatography Method with Mass Spectrometric Detection for Identification of Tattoo Ink Ingredients and Counterfeit Products

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Forgery: 'fingerprinting' documents and packaging.

James D R Buchanan¹, Russell P Cowburn, Ana-Vanessa Jausovec

¹Blackett Physics Laboratory, Imperial College London, London SW7 2BW, UK.

|July 29, 2005

Summary

This summary is machine-generated.

A novel physical identity code, derived from microscopic surface imperfections, has been discovered on common items. This intrinsic, unmodifiable code, readable by a portable laser scanner, can combat widespread document and product fraud.

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Area of Science:

Materials Science
Optics
Security Technology

Background:

Document and product fraud pose significant economic challenges.
Existing security measures are often circumvented.
A need exists for intrinsic, robust authentication methods.

Purpose of the Study:

To identify and characterize a novel physical identity code.
To assess the feasibility of using this code for fraud prevention.
To demonstrate a low-cost method for code detection.

Main Methods:

Microscopic surface analysis of various materials (paper, plastic).
Development of a portable laser scanning system for code reading.
Testing the code's resistance to modification.

Main Results:

A unique, intrinsic physical identity code was found on paper documents, plastic cards, and product packaging.
This code originates from microscopic surface imperfections.
The code is virtually impossible to modify controllably and can be rapidly read with a portable laser scanner.

Conclusions:

The discovered physical identity code offers a powerful, intrinsic security feature.
Implementation of this technology could significantly reduce document and branded-product fraud.
Low-cost laser scanning provides a practical method for authentication.