Utilizing the combination of a digital microscope and Raman spectroscopy in determination the sequence of intersecting strokes from laser toner and water-based ink

Sharaa, S.I.; El-Magd, A. A. Aboul; Bakr, A.A.; Moustafa, Yasser M.; El-Aziz, Ibrahim Mohamed Abd

doi:10.1016/j.dyepig.2018.12.016

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…The pigments and/or dyes presented in the ink composition almost completely accumulate and fill all parts on the intersection point as in Fig. 1 (A) [24]. All brands of ballpoint pen inks (all colors) have the same manner for the absence of specular reflection when the toner passed over them as in Fig.…”

Section: Under the Digital Microscopementioning

confidence: 92%

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Using the Physical and Chemical Characterization for the Ink of Laser Printer and Ballpoint Pen in Determination the Sequence of Their Intersection

et al. 2019

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I N THE forensic document examination, the decision of the historical order of intersection strokes between the toner and ballpoint inks is paramount a challenge issue. Two kinds of intersections are produced on three different kinds of papersheets. The digital microscope and Raman spectroscopy are two non-destroy techniques used to decide, these sequences via cross lines. Four physical properties obtained at the crossing point under the digital microscope were, specular reflection, ink gloss, ink spreading and gap. The results of the digital microscope detect that the two kinds of crossing strokes except the red color of ink crossed over the toner. The results of Raman spectroscopy manifested that the crossing point similar to the pure ink executed later. The complementary techniques of Raman spectroscopy and the digital microscope were necessary to achieve a complete determination of the stroke's intersection sequences of the toner and ballpoint ink.

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Section: Under the Digital Microscopementioning

confidence: 92%

“…Therefore, during the writing process, the ink may be jumped before and/or after the toner to pass over it causing a gap in the ink as in Fig. (3 A) [24][25][26][27]. The toner gaps observed when toner crossed ink.…”

Section: The Ink Gapmentioning

confidence: 99%