Seiboku ( bluish ink ) sumi ink sticks ( 古梅园青墨 古梅園青墨 ）
Seiboku is made from Kobaien’s finest oil smoke; most suitable for blue ink.
Genuine indigo is used to produce a brilliant blue color.
🇯🇵 We are the authorized Japanese dealer of Kobaien's sumi ink sticks. 🇯🇵
