Seihin inkstick ( Brilliant Bluish black, Genuine Indigo, 聖品 青墨 )

Seihin — 聖 (sei, holy) 品 (hin, piece) — stands among Kobaien's finest, most distinctly blue Seiboku inks, made from the very best oil-smoke soot and worked with genuine indigo for a brilliant bluish black.

One customer praised the range it holds — from a deep, near-black to a soft blueish grey — and its remarkably smooth glide across the paper; another called it simply recommended, prizing its silky feel on the stone and the rich fragrance that rises as it's ground.

Suited equally to calligraphy and painting, it rewards close attention to how far you push the dilution.