Han blue film

Han blue is a synthetic barium copper silicate with the chemical formula BaCuSi 2 O 6, han blue film. Recently, it has been discovered that it occurs naturally as the rare mineral Effenbergerite. The stability of this pigment is high and it is also han blue film to high temperatures and it is lightfast as well.

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Han blue film

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A reclining figure rests atop an Etruscan cinerary urn c. But with the help of a simple, nondestructive technique called infrared luminescence imaging, the presence of a bright pigment known as Egyptian blue has been identified on this object. Working with Susanne Ebbinghaus, George M. Over time, the bright blue pigment has flaked and largely disappeared from most objects. Fortunately, Egyptian blue is one of a select group of materials on which visible light is capable of inducing luminescence in the infrared spectral region light that cannot be seen without special equipment. By simply removing the standard infrared-blocking filter on a digital camera, Stenger and Eremin were able to capture this otherwise invisible light with ease. This technique reveals trace amounts of Egyptian blue and can also be used to identify both Han blue and Han purple, two chemically related Asian pigments.

Han blue film

An ancient Chinese purple colorant, often called Han purple, is one of the earliest known man-made pigments. Here at the Asian Art Museum, we are hunting for Han purple and surveying our early Chinese ceramics to find evidence of this special color. The objects shown here are a lidded box and some beads. Colors have always carried symbolic and emotional cultural significance, and purple is among the rarest and most desirable of colorants. Because it was so scarce, it was often restricted to the wealthy or powerful. The use of purple paint on these artifacts shows the importance and high status of these burial sites as well as the sophisticated aesthetic of the time. The decorated surfaces, using contrasting colors against a dark background, may have imitated fine lacquerwares of the period. Han purple and Han blue, along with the closely related color Egyptian blue, have been making news in the world of art conservation. Scientists at the British Museum have recently published research describing the unique light-absorbing and emitting properties of these copper silicate compounds.

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