Hakujuin is used the top cover of the Itabo oyster, and it is refined to white as good as Kinhoin by grinding carefully.
Shirayuki-> hakujuin -> kinhoil, and the higher the quality becomes as it goes to the right, Kinhoin has a soft color and is suitable as a top coat or finish, shirayuki is opaque white and is suitable for the base coat.

Gofun is a Japanese traditional “white” color whose component is calcium carbonate made from Itabo oyster. Left and weathered for over 10 to 15 years, shells are grinded to a stone powder with a stone mill. At the same time, they are purified well and made into sheet-shaped by air seasoning. You can mix with general pigments such as sumi ink and vermillion.