Dr. Ph. Martin's Black Star Hi-Carb Waterproof India Ink, 18 Pack Review (2026)

Who buys this ink in bulk

An 18 pack of the same India ink is built for calligraphy instructors, workshop hosts, and small studios that need every student or workstation using an identical black rather than mixing different ink brands or batches. It is a niche size, not aimed at a single letterer working at a home desk, since one or two bottles of Hi-Carb ink last most individual users a long time given how concentrated the pigment is. Anyone stocking a classroom, running a calligraphy business with several pens in rotation, or wanting backup bottles that will not run out mid-course is the target buyer, while someone just starting out with dip pen calligraphy would likely be better served by a single bottle.

What makes Hi-Carb different from other blacks

This formula is built around a very high concentration of 100 percent carbon black pigment rather than a mix of dyes or added varnish and shellac, which is what gives it an unusually dense, opaque black line compared with many other bottled inks. It dries to a gloss finish and becomes waterproof and lightfast once fully dry, meaning it resists smearing if a wash or a second ink layer goes over the top later, and holds its color over time rather than fading. Each bottle holds 1 fluid ounce, or about 30 mL, and the ink is rated to flow through a fine 4x0 nib, roughly 0.134 mm, which reflects how finely the carbon particles are ground for technical pens and pointed calligraphy nibs.

Using and maintaining a high-carbon ink

Because Hi-Carb ink carries an unusually high pigment load, it needs more frequent nib rinsing than a thinner dye-based ink, since dried carbon particles can build up in the tines of a pointed nib or clog a technical pen if left to dry mid-session. It performs best on surfaces like acetate, illustration board, and heavier paper where line density and edge sharpness matter most, and it also works on canvas and general paper for mixed media pieces. Once the ink is fully dry, pencil guidelines underneath can be erased without smearing the ink, since the waterproof, gloss finish resists both water and light abrasion at that point, though it should cure fully before erasing.

How it compares with other calligraphy blacks

Dr. Ph. Martin's own Bombay India Ink, sold in a 12 bottle set, is a comparable bulk option from the same maker but is a different formula rather than the same Hi-Carb pigment load. Handy Art's Black Velvet waterproof India ink and Speedball's Super Black are both widely used alternatives for dip pens and technical pens, generally sold in larger single bottles rather than multi-packs, which suits an individual user better than a case of 18 small bottles. Hi-Carb's advantage over those alternatives is pigment density and the option to buy an entire matching set at once, which particularly benefits classroom or studio settings over a single user working alone.

Verdict and when to buy fewer bottles

This ink earns a strong score for its rich, waterproof, lightfast black line and its usefulness as a classroom or studio staple where matching ink across many pens matters. The main caveat is the pack size itself: 18 bottles is far more than most individual letterers will use, and the dense carbon formula asks for more frequent nib cleaning than a lighter ink would. Instructors, workshop organizers, and busy studios that want a dependable, uniform black on hand will get real value from buying in this quantity, while a single hobbyist should buy one bottle of the same Hi-Carb formula rather than the full case.

Frequently asked questions