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ultramarine

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ultramarine, blue pigment pigment, substance that imparts color to other materials. In paint, the pigment is a powdered substance which, when mixed in the liquid vehicle, imparts color to a painted surface.
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 used chiefly as a coloring material and as a bluing agent. A double silicate of sodium and aluminum with some sulfur, it is prepared commercially from kaolin, sulfur, soda ash, and other inexpensive ingredients. It was formerly produced by grinding the rare mineral lapis lazuli and was very costly.
ultramarine
1. a vivid blue colour
2. from across the seas

ultramarine
A blue pigment used in paint; once obtained from crushed lapis lazuli; now manufactured synthetically by calcining aluminum silicate and sodium sulfide; has good alkali resistance, but is sensitive to acids.


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Beyond that the tints darkened into fine gradations of ultramarine, and faded into vague obscurity.
The atmosphere beneath is languorous, and is so tinged with azure that what artists call the middle distance partakes also of that hue, while the horizon beyond is of the deepest ultramarine.
A breeze from the north drove little puffs of white cloud across an ultramarine sky, with a bright sea running under it.
 
 
 
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