IRR is a complementary method to IR photography in order to reveal underdrawing and changes in a work of art. It is done with a specialized and costly scientific camera, generally, an InGaAs camera. A less-known variation of this method is IRRF, Infrared Reflectography Fluorescence. Such as for IRF, Infrared Fluorescence photography, some pigments can … Continue reading CHSOS Application note #7: IRRF – Infrared Reflectography Fluorescence