Any reason NOT to use UV glass in a negative carrier (Saunders VCCE diffusion head - quartz halogen)? It's not that I want UV glass per se, just that one of the particular glasses I'm experimenting with only comes a UV coating.

Is there even a meaningful amount of UV-range light in the system? I'm just wondering because I suppose if there was, and you filtered it out, and further assume enlarging paper sensitivity extends into that range, you'd need longer exposures, or even slightly different filtration with VC papers (need to boost contrast slightly due to filtering of some blue-violet spectrum.