What I did discover: OMG my bathroom counter isn't clean after the encounter with Chekhov! I'll be working on that soon.

Top: normal light. Bottom: normal light + ultraviolet.
Left to right:
Akhmatova
Rachmaninov
Tolstoy
Dostoevsky
Kuprin

Top: normal light. Bottom: normal light + ultraviolet.
Left to right:
Tchaikovsky
Tsvetayeva (becomes more orange)
Chekhov (note how this one becomes mustard-colored under UV)
Esenin
Non-Russian ink:
Whiteness of the Whale
And some other Noodler's Inks:

Top: normal light. Bottom (and left inset): normal + ultraviolet light.
Left to right:
Lightning Blue (highlighting ink)
Mata Hari's Cordial (UK eternal)
Highland's Heather (it's purple in the top picture, and green under ultraviolet; it's the most complex ink I own)
Blue Ghost (also at extreme left)
Hunter Green -- it doesn't show up well, but it does have a slight green glow under UV