Fig. 5From: An imaging and spectroscopic methodology for in situ analysis of ceiling and wall decorations in Colonial missions in Northern Mexico from XVII to XVIII centuriesFORS spectra of red areas compared with our laboratory painted reference mock-ups. a Reflectance mode where hematite can be identified and b Log (1/R) mode where cochineal may be clearly identified by its maxima at 525 and 560 nmBack to article page