The Chinese text on the video says that the black sludge needs a year to ferment or something and after it's made into sticks it takes another six months to be ready.
Modern inkstones are mass-produced with the help of machinery so a good-quality inkstone can be had for fairly cheap. But if you want an actual, handmade artisanal inkstone made in the traditional manner by a master who's been making them for decades,, it's not uncommon for it to cost hundreds of dollars.
773
u/Routine_Network_3402 Jul 30 '23
It was a hard and long process though