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Related Experiment Video

Updated: Mar 29, 2026

Sample Drift Correction Following 4D Confocal Time-lapse Imaging

Sample Drift Correction Following 4D Confocal Time-lapse Imaging

Published on: April 12, 2014

Fingermark ridge drift.

Josep De Alcaraz-Fossoul¹, Katherine A Roberts², Carme Barrot Feixat¹

¹University of Barcelona, Faculty of Medicine, Legal Medicine Unit, C/Casanova 143, 08036 Barcelona, Catalonia, Spain.

Forensic Science International

|December 10, 2015

Summary

A new phenomenon called fingermark ridge drift causes individual ridges to randomly shift position during natural aging. This discovery impacts fingerprint analysis, potentially altering identification protocols and accuracy.

Keywords:

Aging Degradation Movement Ridge Titanium dioxide

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Area of Science:

Forensic Science
Friction Ridge Analysis
Biometrics

Background:

Fingermark topography distortions are typically extrinsic, affecting large ridge areas.
Existing analysis assumes widespread alterations rather than localized ridge movement.

Purpose of the Study:

Introduce and describe a novel fingermark aging phenomenon: ridge drift.
Investigate environmental factors influencing this drift.
Assess the implications for fingerprint identification.

Main Methods:

Experimental design with eccrine and sebaceous secretions on glass and polystyrene.
Exposure to varying light conditions (darkness, shade, direct light).
Sequential visualization with titanium dioxide, photography, and analysis of aged vs. fresh marks.

Main Results:

Observed individual ridges randomly changing position independent of adjacent ridges.
This 'ridge drift' appears linked to intrinsic aging processes.
The phenomenon occurs under specific environmental conditions.

Conclusions:

Fingermark ridge drift challenges traditional assumptions about distortion.
It may explain localized dissimilarities and erroneous matches.
Reevaluation of identification protocols, including the 'no single minutiae discrepancy' rule, is warranted.