◆ Gofun is a traditional white pigment made from crushed Itabo oyster shells, mainly composed of calcium carbonate. This pigment is available in three grades: Shirasuki, Hakuju, and Kinho. Shirasuki is known for its strong coverage, making it suitable for base layers. Hakuju has a higher quality with a softer white, and Kinho is the finest grade,  ideal for top layers and finishing touches. 

◆Hon-shu is a natural vermilion originally made from cinnabar. Vermilion is now often synthesized from mercury sulfide, producing the familiar bright red color.