Nondestructive identification of blue pen inks for documentoscopy purpose using iPhone and digital image analysis including an approach for interval confidence estimation in PLS-DA models validation

Valderrama, Leonardo; Valderrama, Patrícia

doi:10.1016/j.chemolab.2016.06.009

Cited by 26 publications

(29 citation statements)

References 34 publications

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“…Several studies [ [2] , [3] , [4] , [5] , [6] , [7] , [8] , [9] , [10] , [11] , [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] ] have been published concerning the analysis and discrimination of writing inks with several kind of instruments. Some papers focused on only one analytical method while others compared a method to another, or combined them to find a methodology to discriminate inks.…”

Section: Ballpoint Gel Fountain Markers Felt-tip Pen Inks and Stmentioning

confidence: 99%

“…Valderrama L. and Valderrama P. analysed blue pen inks using iPhone. After digital image analysis combined with chemometric analysis, the identification of the pen inks types is tested [ 26 ]. The method could be interesting for field application, but it must be improved and many parameters should be taken into account.…”

Section: Ballpoint Gel Fountain Markers Felt-tip Pen Inks and Stmentioning

confidence: 99%

“…Multivariate data analyses or chemometrics are one of the most studied fields. Concerning pen inks, 15 papers refer to this topic [ 3 , [5] , [6] , [7] , [8] , 11 , 14 , [16] , [17] , [18] , 20 , 23 , 24 , 26 , 33 ]. A chemometric approach is primarily used to classify samples or to discriminate them.…”

Section: Ballpoint Gel Fountain Markers Felt-tip Pen Inks and Stmentioning

confidence: 99%

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Interpol review of questioned documents 2016–2019

Deviterne-Lapeyre

2020

Forensic Science International: Synergy

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Section: Ballpoint Gel Fountain Markers Felt-tip Pen Inks and Stmentioning

confidence: 99%

Section: Ballpoint Gel Fountain Markers Felt-tip Pen Inks and Stmentioning

confidence: 99%

Section: Ballpoint Gel Fountain Markers Felt-tip Pen Inks and Stmentioning

confidence: 99%

See 1 more Smart Citation

Interpol review of questioned documents 2016–2019

Deviterne-Lapeyre

2020

Forensic Science International: Synergy

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“…Thus, one of the simplest ways to deal with image data is from color histograms. [47][48][49][50][51][52] The histogram is obtained by unfolding the image into two-dimensional arrays that represent the statistical distribution of pixel counts relative to color components (RGB channels). 31,49 Although color histograms have no direct physical or chemical significance, they can be applied as input data to build useful multivariate models through proper data handling.…”

Section: Introductionmentioning

confidence: 99%

Multivariate Analysis of Digital Images as an Alternative to Monitor Dye Degradation by the Fenton Process

Santos¹,

Pontin²,

Oliveira³

et al. 2020

Quim. Nova

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The present work proposed the application of a multivariate regression model based on image data to monitor the decolorization process. Thus, a PLS regression based on the color histogram was applied to monitor the methylene blue degradation by the Fenton reaction. The results obtained by the digital imaging and UV-Vis methods were compared and the initial (C o) and final (C) methylene blue concentrations, as well as the kinetic parameters, coefficients of determination (R 2), half time degradation (t ½), intercept (ρ), and slope (σ), were evaluated. From our results, the digital imaging and UV-Vis methods have equivalent potential to monitor the color removal profile, similar kinetic term, and low measurement errors. While the coefficient of determination (R 2) of all PLS models and kinetics curves are close to 1.00, the half time degradation (t ½) parameter ranged between 0.29 to 1.39 min for the UV-Vis model, and 0.80 min to 2.17 min for the digital imaging model. Furthermore, the efficiency of methylene blue removal ranged between 92.04% and 97.78% for the UV-Vis model and 91.30% to 93.72% for the digital imaging model. Then, based on statistical comparison tests, it was concluded that the digital imaging method is an alternative to monitor dye degradation processes.

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“…On the other hand, research is underway in full swing to reduce this phenomenon using certain types of papers which difficult to falsify using these types of inks. This goal can be achieved by processing or modifying valuable papers during the manufacturing processes using certain types of polymers (acrylate latexes) that help to hold the ink on the surface of the paper for as long as possible even using these types of inks, and thus difficult to forge [3].…”

Section: Introductionmentioning

confidence: 99%

Application of Some Polymer latexes in Preventing Paper Documents Forgery

Gazy

El‐Zawawy²,

Elsayed³

et al. 2018

Egypt. J. Chem.

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T HE MAIN objective of this research is to improve ink printability of papers via their modification with various types of water-based polymer latexes during paper manufacturing process. In order to achieve this target, various types of styrene-acrylate polymer latexes were used for modification of different types of papers. Styrene-acrylate latexes were prepared via emulsion polymerization of styrene with various acrylate monomers using emulsion polymerization technique. The effect of different emulsifying agents on the properties of the prepared emulsions was studied. The obtained results showed a significant improvement in degree of gloss and ink density on the polymer-coated papers which positively affect the ink ability, and ink holding properties of the modified paper. In addition, ink gloss and ink density of the coated papers improved with increasing the concentration of modifying latexes containing Texapon®P as emulsifier. These promising results open the way to use polymer latexes in treatment of documented value which can be used in stabilization of disappearing ink on paper leading to prevent forgery.

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Nondestructive identification of blue pen inks for documentoscopy purpose using iPhone and digital image analysis including an approach for interval confidence estimation in PLS-DA models validation

Cited by 26 publications

References 34 publications

Interpol review of questioned documents 2016–2019

Interpol review of questioned documents 2016–2019

Multivariate Analysis of Digital Images as an Alternative to Monitor Dye Degradation by the Fenton Process

Application of Some Polymer latexes in Preventing Paper Documents Forgery

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