Grinding Notes Take refined iron ore, black as lacquer, hard in texture. Pound it with a water-powered trip-ha…
Grinding Notes
Take refined iron ore, black as lacquer, hard in texture.
Pound it with a water-powered trip-hammer, then grind with a stone roller.
Grind for one day, particles like rice; grind for two days, particles like millet; grind for three days, get powder as fine as flour.
Further grinding yields no improvement.
Then sieve, keeping the light, fine particles – re-grind the coarse ones, striving for uniformity.
I have heard, 'The finer the ore, the closer the fire's embrace.' Now I test it.