Fadeometer, 1953, used to test light fastness of dyes, in the Atelier de Teinture or Dyeing Workshops, at the Gobelins Manufactory, a historic tapestry workshop, at Le Mobilier National, which commissions and conserves state furniture, in the 13th arrondissement of Paris, France. In this machine, colours are exposed to ultraviolet radiation for 46 hours, accelerating their aging to determine their strength. The dyeing workshop was founded by Colbert in 1665, when a limited palette of natural dyes were used. In 1838 Eugene Chevreul created his chromatic circle, which is now digitised and used for mixing synthetic dyes. Picture by Manuel Cohen
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