Has anyone noticed any signs of precipitate in the Noodler's FPN brown?

I noticed what looks like a precipitate in the bottom of the bottle recently, showing up as a thin light-colored layer along the bottom - viewed from the bottom there seems to be some color variation too.

So, I pulled out my other bottle of it, as yet unopened, and it seems to show the same thing.

I haven't done much more to verify that this really is a precipitate, but from the outside at least it looks rather like it. Anyone else noticed anything similar? I'll post a picture or two tonight if anyone's curious.

Thanks!

All the Noodler’s “bulletproof” colors. These inks, although their dyes are in solution, contain suspended particulate matter (the stuff that makes the ink bond chemically with the paper), and they can sometimes have flow and clogging issues — as well as a high creepability that results from the use of a greater amount of surfactant than normal in order to keep the particulates flowing well.

I suspect Noodler's Eternal Brown is closely related to the FPN Brown. Eternal Brown shows the same phenomena. The precipitate in that brown is yellow and green with traces of black.

As long as you agitate the ink well prior to use, and flush the pen regularly, you'll be just fine. Note, it can take as many as 5 minutes of agitation (i.e. shaking) to fully disolve the particulate.

~~King

I have a couple of other Noodlers Bulletproof colors (Red and Green) and I rarely use them because they do reek havoc on my pens. If you really like brown ink, let me suggest Private Reserve Chocolat. It's a very deep saturated brown color and it doesn't give my pens fits. It's pretty friendly stuff, all in all!

Yep, that sounds about the same. I haven't had any problems with it in pens so far, but it does look like the ink is not a true solution (the "vs. suspension" kind, not the problem kind).

Thanks! There are definitely other browns that I like too; I haven't tried the PR Chocolate, but Waterman's Havana Brown is pretty nice, as is the Pelikan Brown (the latter has more sepia tone).