Above & Below: OPI Glow-Ink The Dark is a beautiful shade of cornflower blue that applied very nicely, although it took 4 coats! I should say it finished nicely because I love the final look, in spite of having to use 4 coats.
Below: A bad quality photo of the 'glow'.
Glow-Ink The Dark is a relatively new offering from OPI for Halloween 2009. It can also be found in their 4 piece mini set called Tattoo Ta-Boo. I'm not exactly sure why I bought this, perhaps for the novelty of the glow in the dark idea. It's a very pretty shade of cornflower blue with very fine shimmer, which is actually the glow in the dark material, a phosphorescent pigment. It finishes with a semi-matte or eggshell loo, but a satiny finish is sometimes a nice change from the total mattes or glossies we've gotten used to. The formula dries quickly, but applies very thin, as this look took 4 coats. I imagine putting a clear coat over it would diminish the glow factor significantly, but because it's so thin, using a coat of it over another color would work fine for a bit of 'glow'. It would also work well using it as a Konad stamping polish, especially if they make a Halloween plate (which I'm not sure of). It does glow a nice greenish color, but I wasn't able to photograph it very well, unfortunately.