I got this to use in my Sailor HighAce Neo and it does not show through
Moleskine Cahier paper at all. I have used this ink on a variety of papers and
it does not feather on any of them. I've noticed some inconsistency in ink flow
(sometimes light, sometimes dark) but I chalk that up to using such a fine nib.
For no feathering and and no show-through it is definitely great stuff - and I
love the color.
This is a beautiful, classic-looking blue-black ink that is permanent, and flows
well. I use it in the inexpensive Sailor HighAce Neo fountain pen, which is also
sold by JetPens, and the it writes like a million bucks. It's a terrific