Reddit reviews Yasutomo, Black KY6 Sumi Ink, 6 oz
We found 1 Reddit comments about Yasutomo, Black KY6 Sumi Ink, 6 oz. Here are the top ones, ranked by their Reddit score.
Formulated for sumi painting and calligraphyThis is permanent, black ink made from quality vegetable oil sootConforms to ASTM D4236
That's a dip pen. He's inking it.
specifically this handle:
https://www.amazon.com/Tachikawa-Comic-Holder-Model-T-40/dp/B000UF2774
as for the nib, I'd have better luck guessing at random, but I know it's one designed for dotting comics.
Also taking a wild guess, it's Sumi ink. Thats a v popular kind lately.
https://www.amazon.com/Yasutomo-KY6-Sumi-Ink-Black/dp/B0026I4UK0