Discussion
Which of the following methods is considered as destructive technique for ink analysis ?
Answer: B
The destructive technique for ink analysis is chromatography.
Thin-layer chromatography, the standard method for comparing ink dyes, requires punching or scraping small pieces of the ink line from the document and dissolving them, so part of the evidence is destroyed.
Lighting techniques (ultraviolet, infrared, oblique), infrared spectroscopy and Raman spectroscopy examine the ink in place without removing it, so they are non-destructive and are used first.
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