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Indanthrone blue was the first example of the brand "Indanthren" (an acronym for Indigo from anthracene) introduced by BASF in 1901. [9] [10] [11] One result is that even now, in Japan vat dyes are commonly described as thren(e) dyes (スレン染料), derived from the Japanese transliteration of the brand.
The first anthraquinone-based synthetic vat dye was indanthrone (C.I. Vat Blue 4) - the synthesis of which was developed by René Bohn in 1901: Synthesis of indanthrone By dimerization of 2-aminoanthraquinone ( 1 ) under strongly alkaline conditions at 220-235 °C, intermediate stage 3 is obtained in two steps, which is cyclized ...
Daniel Smith (sometimes advertised as "Daniel Smith Artists' Materials" or "Daniel Smith Art Supply") is an art supply manufacturer and retailer. Dan Smith, a noted printmaking artist, [2] founded the operation in 1976, endeavoring to produce artist grade printmaking ink. [3] [4] Later, watercolors and oil paints were added to its products.
Furthermore, the quality of the new dyes increased. Chemist Rene Bohn developed a brilliant blue vat dye, indanthrone, with excellent color fastness in 1901. BASF(Badische Anilin und Soda Fabrik), the largest manufacturer of vat dyes, sold it as Indanthren Blue RS, along with the synthetic indigo they placed on the market in 1897. [19]
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Daniel Radcliffe has written a heartfelt tribute to his late Harry Potter co-star Dame Maggie Smith, who has died at the age of 89.. Radcliffe played the boy wizard in eight movies from 2001 to ...
Daniel Radcliffe is paying tribute to the late Maggie Smith, who died Friday at 89 years old. The two actors are veterans of the “Harry Potter” film franchise. Radcliffe starred in the title ...
Bastille’s Dan Smith has released a further two tracks from his forthcoming solo album project, & (Ampersand).. The frontman and songwriter for the British pop act announced the songs on Friday ...