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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.
The ancient method for mass-producing blue dye from Hexaplex trunculus has not been successfully reproduced. Today, with stronger reduction agents which are more transparent, it is possible to break the original purplish hue molecule and degrade it by introducing it to UV sun rays, resulting in a more blue color.
Alkali blue Alkali blue 4B Alkali blue 5B Acid blue 110 42750 triarylmethane 62152-67-4: Alkannin: Anchusin Natural red 20 75530 natural 517-88-4: Allura Red AC: Food red 17 16035 azo 25956-17-6: Amaranth: Azorubin S Acid red 27 16185 azo 915-67-3: Amido black 10B: Amidoschwarz Naphthol blue black Acid black 1 20470 diazo 1064-48-8: Aniline ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 14 December 2024. For other color lists, see Lists of colors. This article relies largely or entirely on a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to additional sources. Find sources: "List of colors" alphabetical ...
The word is derived from the Latin word caeruleus (Latin: [kae̯ˈru.le.us]), "dark blue, blue, or blue-green", which in turn probably derives from caerulum, diminutive of caelum, "heaven, sky". [2] "Cerulean blue" is the name of a blue-green pigment consisting of cobalt stannate (Co 2 SnO 4). The pigment was first synthesized in the late ...
Munjeet was an important dye for the Asian cotton industry and is still used by craft dyers in Nepal. [22] indigo Indigo is a deep blue derived from any of the indigo dye-bearing plants, primarily those in the genus Indigofera, especially true indigo (Indigofera tinctoria, also known as Indigofera sumatrana). [5] [6
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 ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 26 January 2025. Variety of the color blue For other uses, see Shades of Blue (disambiguation). "Shade of Blue" redirects here. For the song by Black Rebel Motorcycle Club, see Shade of Blue (song). For the R&B/funk band, see Shade of Blue (band). Blue Wavelength 440–490 nm Common connotations ...