This is After Dark from Krishna. It is one of the Super Rich series ink, and boy is that an apt description. The ink is a rich royal blue and seems very saturated, but may just be a very dark ink. Regardless, it is very well behaved especially for such a seemingly highly saturated ink. Considering this is a blue ink the water resistance was a very pleasant surprise. A vibrant, good flowing, water resistant ink. Only downside is the small bottle, but I can always order more. Smells distinctly of phenol. See, it's water resistant, as in paper chromatography with dH2O barely moved the ink. Seems like only one dye component.