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Identification of Dyes in Pen Ink by High Resolution Mass Spectrometry: A Laboratory Experiment
Study of chemical profile and of lines crossing using blue and black ink pens by LDI (+) MS and LDI (+) imaging - ScienceDirect
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What is Pen Ink Made of? - Truth Behind It
Study of chemical profile and of lines crossing using blue and black ink pens by LDI (+) MS and LDI (+) imaging - ScienceDirect
