A key has been added, written on Clairefontaine paper, with a number of different inks for reference.
Standard Disclaimer: Image provided only to give a general sense of the color. The vibrance and nuance are typically lost when an ink is digitized.

Review
When I write a review, I first focus on color, and award an ink 0 to 100 based upon that alone, separate from other considerations. I then deduct points from the color score for defects (ie: lack of flow, creep, etc), to arrive at an overall score.
Color
I like Skrip Blue-Black. It's total vintage, even more so than the Sailor B-B. A greyish-blue black, with perhaps the slightest touch of green. The shading is very good. In a dry writer like mine, though, it can look washed out, so I'd save this for larger gauges and/or wetter nibs.
At a glance, and when looking at very small excerpts, the Sailor and Sheaffer Blue-Blacks appear very similar. However, the Sailor is richer, and is decidedly blue-black, whereas the Sheaffer has that touch of green.
Color Score = 85
Deductions
During my recent tests, only two inks gave me any real problem with flow: Diamine B-B and Sheaffer B-B. The Diamine was more of an inconvenience than anything else, whereas the Sheaffer has a definite flow issue. If you look closely at the "lorem ipsum" passage in the above image, you can actually see the ink get lighter as the paragraph goes on.
-5
Overall Score = 80 out of 100

