Ink for Pilot Fountain Pen.
70 ml of high-quality, general use fountain pen ink from Pilot specifically
targeted for plunger-type fountain pens. Each of these ink bottles easily
solves that problem with a simple plastic tube in the 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.

• Carbon ink This waterproof, lightfast, pigment-based carbon ink is highly sought after by artists. Each bottle is filled with 60 cc of lush, black liquid ink made from the famous Platinum Co. of Japan.
  This ink performs great with fountain pens of various nib sizes. Please note: regular care and cleaning should be done, as carbon ink can be damaging if allowed to completely dry up inside the pen.
• Pigmen ink Due to application of ultra-fine particles, PIGMENT INK is characterized with
  improved chromogenic,quick-drying and water-resistant.
  With this ink the written characters remain firm, thus very suitable for
  writing on Public documents, Contracts etc.
  Available in blue , red rose, and brun sepia color.
  

With this system any combination ink color is possible.
Stable, mixable, and completely compatible these 9 color can combine to make

Can be freely mixed but if mix with ratio 1:1 then refer to the chart.
Dilution liquid is available.
Avoid direct sunlight.
Keep away from children.
Not compatible with another ink brand.
Mixable to 3 color.

A classic and safe fountain pen ink from Pelikan. Ink will not easily stain
stain or clog fountain pens. The ink flows smoothly in fountain pens and is
water-soluble. Multiple ink colors available.

Each bottle contains 50 ml of water-based dye ink. The bottle is cleverly
designed with an internal reservoir, which results in an ink level that's
high enough for you to refill your fountain pen.