Posted 05 August 2007 - 19:38
Just a quick update on my ink-mixing experiments. After putting down a swab of Tanzanite, I didn't like my chances of coming up with anything like it using solely Waterman Black and Waterman Purple. Those seeking Tanzanite-like color from Waterman inks are still best served by mixing the Binder Blurple.
In any case, I mixed the purple and black inks in several ratios of purple-to-black: 1:1, 2:1, 3:1, 4:1, 5:1, and 6:1. I also mixed them at 1:2 and 3:4 just to see what happened.
I sampled each on a page of a Black and Red writing pad using a toothpick and a cotton swab. The toothpick lines are generally more concentrated than the cotton swabs, and are more closely representative of what you'd see out of a pen.
At 1:1, the ink actually looks more like a proper blue-black. It's black at first glance, but if you look carefully at the tails of letters and anywhere there's shading, there's the slightest touch of purple. Nice. (I have that loaded into my Sailor 1911 now, since it seemed kind of cool.)
At higher ratios, the purple quickly overpowers the black. If you're looking for a dark black, you'd do well with any ratio of purple-to-black between 2:1 and 4:1. After that, it begins to get a little bit too close to plain old purple again.
Going the other way, a 1:2 ratio of purple-to-black yielded black. The black pretty much ate the purple. At a slightly more even ratio, 3:4, it becomes something more like a gray. At 3:4, there's no hint of purple, but it's not as saturated a black. That could also be nice under the right circumstances.
I'll post the scan of the page a bit later. My scanner lives in the basement, so I have to haul my laptop down there to scan.