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Not thrown, formed by hand
赤楽 fired at 700-800°C, 黒楽 at over 1000.
赤: Not a flaring red, but earthy.
黒: At the times of 長次郎(ちょうじろう)it was brown black, only when firing temperatures rose later they became fully black.
Ullrich
writes that
利休 used 赤楽 for the 2
畳 room, which was already dark, the wands being blackened and all, and using 黒楽 would've been too much. He used 黒楽 in the 4.5
畳 room.
3 colours of 侘び: the green of the
畳, the red of the
茶碗 and the black of the walls of 待庵.
長次郎(ちょうじろう) Ware
1580 mention of red 楽, seems to be the earlier type.
1586 first time mention of a Soeki-shape
茶碗.
Possibly a whole bunch of different potters in the family made pots under this name.
Example: 無一物(む いち もつ). Famed because it's not trying to express any inclination of the maker, it just sits in the room quietly.
Famously, 大黒(おお ぐろ)(picture from
Ullrich)
Jokei (II)
It is said that
利休 liked 長次郎(ちょうじろう)'s wares, and his son, Doan, Jokei's.
Nonko (III)
了入
了入(りょうにゅ)IX (1756-1834) was very prolific, invented cutting method (
link), regarded as one of the greatest.