Hwangmo (황모필, weasel-tail hair): firm, precise — the standard choice for fine detail work (細筆)
Yangmo (양모필, goat hair): soft, gentle
Jangaek (장액필, roe deer underarm hair): reputed as the softest of all Korean brush hairs — a material with no close equivalent documented in Chinese or Japanese brush-making
Dakteol (닭털붓, chicken feather): used specifically for bibaek (飛白) — a broken, "flying white" stroke effect where the brush splits mid-line, a deliberate special effect rather than a flaw
Non-animal fibre brushes: jukpil (죽필, split bamboo fibre) and galpil (갈필, kudzu vine fibre, boiled in salt water for over a day and pounded to separate the fibres) — a technique also documented in Chinese brush-making (竹筆/藁筆/草筆), so understood as a shared regional method rather than uniquely Korean
Jindari-buht (진다리붓): a named, Intangible-Cultural-Heritage-recognised brush from Jeollanam-do's island region, combining hwangmo (harvested January–April) and goat hair, with bamboo handles cured in ochre and rice bran, then sun-dried for 2–3 months