Wild speculation but it might be possible if you had a calibrated hyperspectral camera, calibrated light source at a known distance and luminous flux level, and

Wild speculation but it might be possible if you had a calibrated hyperspectral camera, calibrated light source at a known distance and luminous flux level, and a database of known good masks. I mean the equipment "fits" "at home" (lol) I wonder if its possible to burn masks and analyze the spectrum of the light emitted by the burning masks. Might need a hyperspectral camera for that and it might not yield any useful information.