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Chalk is a soft, white, porous, sedimentary carbonate rock. It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the ...
Boxes of Hagoromo Fulltouch Chalk, produced by Hagoromo Bungu. Hagoromo Fulltouch Chalk (Japanese: 羽衣フルタッチチョーク, Korean: 하고로모 풀터치 분필) is a South Korean-owned brand of chalk for blackboards, originally produced by Japanese company Hagoromo Bungu (羽衣文具). Production of the chalk began in 1932.
In China, Zhang Heng (78–139) wrote of plays with artificial fish and dragons, and a 6th-century text Xijing Zaji states that when Liu Bang (reigned as Emperor Gaozu of Han from 202 to 195 BC) came upon the treasury of the deceased Qin Shihuang (r. 221–210) in 206 BC, he found an entire mechanical orchestra of 1 m (3.3 ft) tall puppets ...
Blue Willow china and its legends appear in Lee Blessing's play Going to St. Ives. In Terry Pratchett's novel Interesting Times, an oriental artist is about to paint (on a plate) a picture of a garden scene when some sumo wrestlers and guards come crashing through and destroy his entire palette except for blue. He resolves to paint, in just ...
The U.S. announced it would place 10% tariffs on Chinese imports earlier this month, according to The Associated Press. China retaliated by placing tariffs on some U.S. goods, and stated it would ...
A fragment of a dharani print in Sanskrit and Chinese, c. 650–670, Tang dynasty The Great Dharani Sutra, one of the world's oldest surviving woodblock prints, c. 704-751 The intricate frontispiece of the Diamond Sutra from Tang-dynasty China, 868 AD (British Museum), the earliest extant printed text bearing a date of printing Colophon to the Diamond Sutra dating the year of printing to 868
Kaolinite (/ ˈ k eɪ. ə l ə ˌ n aɪ t,-l ɪ-/ KAY-ə-lə-nyte, -lih-; also called kaolin) [5] [6] [7] is a clay mineral, with the chemical composition Al 2 Si 2 O 5 4.It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO 4) linked through oxygen atoms to one octahedral sheet of alumina (AlO 6).
The Chalk Group (often just called the Chalk) is the lithostratigraphic unit (a certain number of rock strata) which contains the Upper Cretaceous limestone ...