What's the easiest and most affordable way for obtaining UV reflectance images?

Ed Constable wrote:

I tried NaCl before CaF2. It did the usual thing that IR cells do ... went cloudy and had to be republished. You know, way back in pre-history we used to make KBr disks. The KBr flows under high pressure and gives an optically clear disk. You might have some of the presses around still. But they were usually on 1cm or so diameter.

An old story

When I started in the lab we used NaCl for all our IR cells & had to replace then every year or so. For one application I eventually switched to CaF2 & over 20 years later we're still using the same cell. Unfortunately its transmission doesn't go down far enough for some of our applications (no transmission below about 1500cm-1 while measuring benzene required us to use 675cm-1)

After 5-10 years of using CaF2 I had a good look at other options that could be used at 600cm-1 & ended up getting a set of KRS5 windows - they also have no issue with water, but they have the twin disadvantages of high refractive index (restricting the path length options that are practical) & high toxicity (not safe to polish yourself). These are also lasting well

We've never used KBr cells but yes I've used a press to make KBr discs, but never enough to be good at making them. I think our 10 ton press has now gone (we still have the die) ATR sampling has rather taken over for the things that needed it.

I certainly wouldn't want NaCl in my camera.