70 ml of high-quality, general use fountain pen ink from Pilot specifically targeted for plunger-type fountain pens. Each bottle contains a simple but brilliant solution to the age old problem of how to enjoy every last drop of your fountain pen. Plunger type suction fountain pens usually need a certain level of ink to be able to suck up ink into the pen body. In normal bottles, as you approach depleting ink reservoirs it gets more and more difficult to suck up ink. Each of these ink bottles easily solves that problem with a simple plastic tube in the bottle. Anyone who has ever filled a water bottle up and placed it upside down into a bowl will know how the phenomenon works, atmospheric pressure balances out so that the water in the bottle remains higher than the surrounding water in the bowl. In the case of this ink bottle, as the ink levels get low, simply tighten the bottle cap, flip the bottle upside down, and then flip it right side up. Ink levels remain higher within the plastic tube than in the rest of the bottle, allowing you to fill your plunger-style fountain pen with ease. Thank you Japan for the great physics lesson!
Pilot standard-issue black fountain pen ink is super-black and smooth. It has to
be one of the blackest blacks available today and the 70ml bottle is very handy
for longer pens--including Pilot's new, large Custom 823 vacuum-filled fountain
pen which requires a deeper bottle. You cannot go wrong with this terrific black
This is my go-to-black ink, along with Pilot Blue. In terms of color, the ink
could be better. On paper, the black is slightly washed-out. However, it is
also very free flowing, doesn’t feather too badly, and is extremely safe and
clog-free. The 70ml bottle is also pretty economical (note: it would be even
MORE economical if JetPens would stock the 350ml refill bottles). The Pilot ink
also keeps for prolonged periods of time without developing slime or sludge in
the bottle. If the color was more saturated, I would give it 5 stars. However,
I am happily willing to give-up a little on color for a safe and free flowing
ink like this.