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Heritage Science
Fig. 10 | Heritage Science

Fig. 10

From: Gutta percha, natural rubber and balata-chemical characterization of polyisoprenes in the context of cultural heritage

Fig. 10

The spectra from cultural heritage artifacts, Group IV. The.1H NMR spectra indicated that gutta percha was used in making the cherub (CW1), an assembly of figures (CW7), an ink well with Three Monkeys (CW13), and the medallion (CW14). They clearly show the double peaks that characterise trans-polyisoprene. Natural rubber was identified in two balls, CW8 and CW9. The sample darker in color, CW9, showed a much greater amount of degradation products than CW8

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