Triarylmethane resin

Ota, M. and Ohtani, S., Evolution of ferromagnetism in the triarylmethane resin synthesized under magnetic field, Chem. Lett., 1179, 1989. 

Ink analysis and related analyses of questioned documents have come to rely heavily on IR spectroscopy. As with paints, applications evolved from traditional IR through DRIFTS techniques and now employ principally MSR Inks are analyzed in situ or on sampling substrates such as KBr plates. like paints, inks produce IR spectra representative of mixtures unlike paints, inks rarely have a layered structure. Regardless, spectra of inks do contain information that is useful for classification. For example, a study of 108 inks demonstrated that distinctive absorption bands could be rationalized on the basis of ink composition and then employed to divide the test population into two groups. As shown in Figure 12.7, one group contained C—C stretching characteristic of an epoxy resin and features associated with triarylmethane dyes, as shown in... 

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