ultramarine

• Nor did I know that he also worked at Selfridges refolding the towels after dissatisfied punters had given them a shake, decided that ultramarine wasn't for them and thrown them back on the rail. —  Home | Mail Online
• When so ground, it forms the stable and magnificent colour, genuine ultramarine, which is the finest and purest blue on the artist's palette, but owing to its extremely high price its use is not in very great demand, especially as many excellent chemical substitutes of equal permanence are obtainable at little cost The Turquoise. —  The Chemistry, Properties and Tests of Precious Stones
• Several specimens of ultramarine were acted upon, but in no case was a red or anything like a red obtained, the products ranging from a slate-gray to a drab-grey. —  Field's Chromatography or Treatise on Colours and Pigments as Used by Artists
• Although not to be ranked with ultramarine, the stannic and aluminous blues may be described as durable, or at least as durable rather than semi-stable. —  Field's Chromatography or Treatise on Colours and Pigments as Used by Artists
• Hence it has been superseded to a great extent by artificial ultramarine, the presence of which may be detected by the yellow spot which a drop of acid leaves on the paper A coarse gritty texture is peculiar to smalt, whether it be the Powder Blue of the washtub and Blue Sand of the pottery, or the Dumont's and Royal Blue of the artist and high-class manufacturer. —  Field's Chromatography or Treatise on Colours and Pigments as Used by Artists

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