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Jian artisans experimented within this ceramic type with daz-       they rst encountered them. Once in Japan, the bowls were
zling results. By manipulating body and glaze compositions,         adopted by Japanese tea masters and contributed signi cantly
kiln temperatures, the cooling process, and allowing for the        to the development of styles within the Japanese tea ceremony.
interventions of chance factors in the ring process, Jian           Consequently, temmoku has become the universally accepted
ceramicists created wares that display the full potential of the    term to describe these nacreous black wares.
iron oxide glaze. One of the best known e ects is ‘hare’s fur’
(Jpn. nogime), in which opalescent streaks run down the sides       Although in China the production of black-glazed tea ware
of the bowl. Another, more rare, is the ‘oil spot’ (Jpn. yuteki)    began to decline in the Yuan dynasty (1279-1368), with kilns
surface, in which tiny shimmering circles appear on the glaze.      converting to the production of qingbai-type wares, in Japan
The latter is di cult to achieve because the craftsman must         whipped tea continued to be ritually prepared and consumed
interrupt the ring between the moment when the spots form           in the tea ceremony. There, temmoku tea bowls were admired
and moment they dissolve into streaks.                              and treasured for centuries to come. They were incorporated
                                                                    into family traditions of densei, the passing down of cherished
The present ‘Jian’ tea bowl is rare in that it exhibits both types  objects to the next generation within a lineage, and accrued
of variegation in the glaze. Its steeply angled sides are bathed    prestige with each subsequent transmission. Within the densei
in a thick inky black glaze that pools just above the chocolate-    system, Song dynasty ceramics were particularly valued. To
brown foot. On each side of the metal-bound rim, copper-toned       accord with their exalted status and brilliance, temmoku tea
‘oil spots’ coalesce in a dense, continuous cluster dispersing      bowls were sometimes paired with ancient mother-of-pearl
into a looser distribution at the shoulder before transforming      inlaid lacquer stands, were wrapped in custom-made silk
into an upper register of ‘hare’s fur.’ Throughout, new copper      pouches, and were stored in cushioned paulownia boxes. It is
freckles emerge and cascade downward, thinning, lightening,         in Japan that many of the most striking examples of Jian wares
and wavering as they reach the bottom. This internal complex-       are preserved. The present ‘Jian’ bowl is one such example. Its
ity refracts light in unexpected ways, allowing the surface to      unblemished surface testi es to its history as a family heirloom
appear black and copper at one moment, and a combination            in Japan.
of aubergine, teal, midnight blue, and gold the next, constantly
beckoning and teasing the eye. On the interior, the glaze culmi-    A wide range of di erent temmoku bowls are in the Tokyo
nates to one side of the well with tiny golden specks around a      National Museum, Tokyo, included in Illustrated Catalogue
larger spot, like stars orbiting a planet. The smoothness of the    of Tokyo National Museum. Chinese Ceramics I, Tokyo, 1988
glaze allows it to express the full range of luminous e ects even   pls. 635-640; another bowl with a highly iridescent glaze, in
to this day.                                                        the Kyoto National Museum, Kyoto, is illustrated in Sekai tōji
                                                                    zenshu / Ceramic Art of the World. Sung Dynasty, vol. 12, Tokyo,
The notoriety of Jian bowls quickly spread to Japan via             1977, pl. 253; and a further bowl from the collection of Diane H.
Japanese Zen Buddhist monks who travelled to the monaster-          Shafer, is published in Mowry, op. cit., pl. 82. Three exemplary
ies of the Tianmu (‘eyes of heaven’) mountain range, west           ‘Jian’ tea bowls have recently sold at auction, including a silver-
of Hangzhou (Zhejiang), where the bowls were used by local          streaked edition from the Pilkington collection at our Hong
monks for drinking tea. The Zen monks were so impressed by          Kong rooms, 6th April 2016, lot 12; an ‘oil spot’ bowl from the
the visual, tactile, and functional qualities of the bowls that     Linyushanren collection at Christie’s New York, 15th September
they brought them back to Japan in order to use them for the        2016, lot 707; and a blue-toned version at our London rooms,
same purpose and dubbed them temm ku (or tenmoku), the              9th November 2016, lot 108.
Japanese pronunciation of Tianmu, in honor of the place where

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