Fig. 7
a UVRFC and c IRRFC images of the gourd’s bottom, in which organic yellows and indigotin, respectively, show as red. A visible light image b is also provided for comparison
Fig. 7 | Heritage Science
a UVRFC and c IRRFC images of the gourd’s bottom, in which organic yellows and indigotin, respectively, show as red. A visible light image b is also provided for comparison
