I’m stuck on the UV Camera Calibration. I don’t have access to a spectroradiometer—are there any known values for the soft pastels mentioned in the toolbox, like there is for the x-rite passport? If not, what analyses am I limited to without this calibration?
I’m afraid each set of pastels is likely to have a very different response (even if you buy the same pastel set), because there’s not the level of reflectance standardisation required for artists’ materials.
So you’ll need to get access to a spectrometer to measure your set. This is the major difficulty with UV imaging, and each camera/lens/filter combination can create quite different responses.