Fig. 4From: An analytical study of the Huexotzinco Codex using X-ray fluorescence, fiber optic reflectance spectroscopy, and portable Fourier-transform infrared spectroscopyDigital photograph of Paintings IV and VII show examples of red painted areas. Microscope images were taken from Painting VII using a halogen and mercury lamp with a ×20 objective. The cochineal was found to be non-fluorescentBack to article page