Here are comparisons of different black inks I've used so far. I'll keep adding to the list.
Top half of the square represents one layer of ink, and the bottom two layers.
Here's the quick rundown of pros and cons of each ink. If you want the detailed review, just click and visit the individual reviews.
Daler Rowney Calli Black Ink
+ Pigment ink, archival
+ Intensely black
+ Waterproof to a great extent (9 out of 10)
+ Opening has good size for dip pens and brushes
+ Dries fast to a neutral tone
- Dries to a slight sheen
- It can rub off if too much ink is used
Dr. Ph. Martin's Bombay Black India Ink
+ Pigment ink, archival
+ Intensely black
+ Waterproof
+ Dries fast to a neutral tone
+ Slight ink comes off with heavy erasing
+ Does not feather even on lousy paper
+ Bottle has a dropper
- Opening is a bit small for dip pens and brushes
Pilot Iroshizuku Take-Sumi ink (Bamboo Charcoal, Black)
+ Intensely black
+ Dark areas blend smoothly to less concentrated areas
+ Beautiful blown glass bottle
+ Holds up well to erasing
+ Drying time is average to fast
- It's a dye ink, not archival
- Not waterproof
- Dries to a cool tone bias
- More expensive than other black inks
Pelikan Fount India Ink
+ Pigment ink, archival
+ Black but not as intense as the blackest inks
+ Bottle has a dropper
+ Plastic bottle means it won't get affected on board planes
+ Dries to a neutral tone
+ Quick drying time
+ After dried, it does not smudge even when rubbed
- Dries to a slight sheen
- Not waterproof
Noodler's Black Bulletproof Ink
+ 97% water-based formula, archival
+ Bonds only with cellulose
+ Waterproof to a great extent (9 out of 10)
+ Sold in very economical 90ml bottles
+ Holds up well to erasing
- Less than dark black
- Dries to a warm tone bias
- Looks blotchy when used to fill areas
- Dries slowly
Rotring Drawing Black Ink
+ Intensely black
+ Dries to a neutral tone
+ Pigment ink, archival
+ Waterproof
+ Fast drying time
+ After it's dry, it does not smudge even when rubbed
- Can dry to a slight sheen at concentrated areas
- Bottle is designed for refilling technical pens and not for dip pens or brushes