Ink Review: Pelikan's 4001 "Brilliant Brown" Ink

Here I review an ink by Pelikan, from their standard 4001 series, by the title of "Brilliant Brown" (a medium-Brown/Tan ink, with nice shading, and noticeably-wet flow). Here-in may be found my own thoughts and opinions on the matter, as well as some test results I have for (among other factors) water-resistance on Clairefontaine, Fabriano, Rhodia, Tomoe River, Copier Paper, Mead Notebook Paper, and Moleskine papers; and using both a Pilot "M.R." with a (Japanese) Medium nib, and a JinHao X450 with a fairly-Broad-fairly-wet nib as pens for these tests/experiments.