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Prussian blue pigment is significant since it was the first stable and relatively lightfast blue pigment to be widely used since the loss of knowledge regarding the synthesis of Egyptian blue. European painters had previously used a number of pigments such as indigo dye , smalt , and Tyrian purple , and the extremely expensive ultramarine made ...
Prussian blue is a dark blue pigment containing iron and cyanide produced by the oxidation of ferrous ferrocyanide salts. It was invented in Berlin between 1704 and 1710. It had an immediate impact on the pigment market, because its intense deep blue color approached the quality of ultramarine at a much lower price.
Engineer's blue is prepared by mixing Prussian blue with a non-drying oily material (for example, grease).The coloured oil is rubbed onto a reference surface, and the workpiece is then rubbed against the coloured reference; the transfer (by contact) of the pigment indicates the position of high spots on the workpiece or conversely highlight low points. [1]
Between 1704 and 1706, Diesbach was working as a paint manufacturer in Berlin. He was using an extract of crushed cochineal insects, iron sulphate and potash to create cochineal red lake. [2] [3] One batch of the product unexpectedly turned pale pink. When he tried to concentrate the mixture, it turned purple, then deep blue.
In the 17th century. The Prince-Elector of Brandenburg, Frederick William I of Prussia, chose Prussian blue as the new colour of Prussian military uniforms, because it was made with Woad, a local crop, rather than Indigo, which was produced by the colonies of Brandenburg's rival, England. It was worn by the German army until World War I, with ...
With a history dating back to the early eighteenth century, Prussian blue remains a popular artistic pigment. Studies of Prussian Blue lead to discoveries about hydrogen cyanide. It is an antidote for heavy metal poisoning, and is famed for being used to color the uniforms of the Prussian army in the eighteenth century. [25]
Egyptian blue was used to paint wood, papyrus and canvas, and was used to color a glaze to make faience beads, inlays, and pots. It was particularly used in funeral statuary and figurines and in tomb paintings. Blue was considered a beneficial color which would protect the dead against evil in the afterlife. Blue dye was also used to color the ...
Prussian blue is changed to Midnight Blue because of Prussia by then being an extinct country for decades. 1959: The first Crayola TV ads appear during the children's TV show Ding Dong School. In the 64-count box of crayons, two colors are discontinued and replaced by others: "Brilliant Rose" by "Magenta," and "Light Blue" by "Turquoise Blue."