An Evaluation of the Use of Laser-Induced Infrared Luminescence to Differentiate Writing Inks

Horton, Richard A.; Nelson, Larry K.

doi:10.1520/jfs13093j

Cited by 13 publications

(3 citation statements)

References 5 publications

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“…Capillary zone electrophoresis has been applied to the analysis of water-soluble fiber-tip pen inks from documents (774) . An examination of 56 inks with an argon ion laser revealed that laser-induced IR luminescence may be a useful tool in differentiating inks (775). Colored pencils have been differentiated by TLC (776).…”

Section: Forensic Biochemistrymentioning

confidence: 99%

Forensic science

Brettell¹,

Saferstein²

1993

Anal. Chem.

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Section: Forensic Biochemistrymentioning

confidence: 99%

Forensic science

Brettell¹,

Saferstein²

1993

Anal. Chem.

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“…In the initial studies on ink dating research [ 1 , 12 , 13 ], static approaches such as ink stroke measurement (size, color, hue, value, and chroma according to international notation and light reflectance) were used to differentiate inks. Other analytical methods such as ultraviolet-visible (UV-Vis) spectrometry [ 14 ], infrared luminescence spectrometry [ 15 ], near infrared-UV-Vis (NIR-UV-Vis) spectrometry [ 16 ], video spectral comparator [ 17 ], laser-induced fluorescence [ 13 ], and laser-induced infrared luminescence [ 18 ] were also applied to compare and identify inks. Ink analysis based on the extraction rate obtained using solvents with different polarities against a sufficiently expansive database of reference samples was also widely adopted as a relative ink dating method.…”

Section: Introductionmentioning

confidence: 99%

Combination of a Green and a Traditional Method for Estimating Relative and Absolute Ink Age: A Case Study of Ballpoint Pen Ink Dating in Vietnam

Hoang

et al. 2021

Journal of Analytical Methods in Chemistry

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The dating of ink in questioned documents remains a significant challenge in forensic investigations in Vietnam and other countries. Many forensic examination methods have been usually applied to ensure the highest accuracy of the assessment results while maintaining high environment awareness. In this study, paper characteristics were physically tested to confirm source similarity, and the relative ink dating was established by high-performance thin-layer chromatography (HPTLC). Absolute ink dating by solvent and dye identification was performed by Raman spectrometry—a green technique, using a time-dependent degradation model for crystal violet and the comparison between 2-phenoxyethanol peak intensities. We found that the relative dating of the questioned document was 14 ± 3 months lesser than that of the reference samples, i.e., the absolute age of the questioned samples was estimated to be 24 ± 3 months. The combination of the conventional HPTLC method with the dynamic crystal violet degradation Raman model provides promising results for relative and absolute ink dating of ballpoint pens, which can be applied for documents written 1–15 years prior to the time of examination. The combination of the abovementioned methods demonstrated an acceptable error margin, affording highly practical applications in modern forensic science.

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“…The techniques that are used by Forensic Document Examiners (FDEs) to detect these types of forgery are based on physical, microscopic and chemical examination [2], [3], [4], [5], [6], [7]. Some modern imaging tools are also available but those are not at all automatic.…”

Section: Introductionmentioning

confidence: 99%

Detection of Fraudulent Alterations in Ball-Point Pen Strokes Using Support Vector Machines

Kumar¹,

Pal

Chanda

et al. 2009

2009 Annual IEEE India Conference

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Fraudulent addition to cheques, wills, contracts, and other legal documents may result in serious consequences leading to an irreparable damage in terms of human suffering as well as severe financial loss. The increasing graph of loss due to such a white collar crime is a matter of serious concern. In this paper we propose a mechanism for detection of alteration in ball-point pen strokes using pattern recognition techniques. A large set of features based on color and texture is extracted from images of documents. To find a set of discriminatory features, a neural-network-based feature analysis technique is used. Finally, Support Vector Machine (SVM) is used for the detection. The model selection is done using cross-validation in conjunction with some constraint on false positive rate (FPR) that is demanded by the problem domain. The results are very encouraging.

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An Evaluation of the Use of Laser-Induced Infrared Luminescence to Differentiate Writing Inks

Cited by 13 publications

References 5 publications

Forensic science

Forensic science

Combination of a Green and a Traditional Method for Estimating Relative and Absolute Ink Age: A Case Study of Ballpoint Pen Ink Dating in Vietnam

Detection of Fraudulent Alterations in Ball-Point Pen Strokes Using Support Vector Machines

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