The strength of Technical Photography lies in the variety of images captured: while a few may seem unremarkable, some reveal crucial details. In this case study of a 16th-century Antiphonary parchment sheet, the infrared image proves especially informative. It highlights the behavior of two key pigments and one ink. The black ink appears slightly transparent in IR, a typical trait of iron gall ink. Among the pigments, the blue darkens noticeably, consistent with azurite, while the red reflects infrared and appears bright, as expected for vermilion. These findings are confirmed through spectroscopic analysis.