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Haematoxylin or hematoxylin (/ ˌ h iː m ə ˈ t ɒ k s ɪ l ɪ n /), also called natural black 1 or C.I. 75290, is a compound extracted from heartwood of the logwood tree (Haematoxylum campechianum) [1] [2] with a chemical formula of C
Arkansas Black apples are generally medium-sized with a somewhat flattened shape. Generally a very dark red on the tree, occasionally with a slight green blush where hidden from the sun, the apples grow darker as they ripen, becoming a very dark red or burgundy color.
The cloth had to be dyed several times to darken the color. One solution used by dyers was add to the dye some iron filings, rich in iron oxide, which gave a deeper black. Another was to first dye the fabric dark blue, and then to dye it black. A much richer and deeper black dye was eventually found made from the oak apple or "gall-nut". The ...
Caroline Dye (1810 or 1843–1918) [1] also known as Aunt Caroline, was a renowned African American Hoodoo woman, rental property investor, soothsayer, rootworker and conjuror based in Newport, Arkansas.
Black 7984: Food black 2 27755 diazo 2118-39-0: Blue MX-R: Reactive blue 4 61205 anthraquinone 13324-20-4: BODIPY: Dipyrrometheneboron difluoride 138026-71-8: Brazilin/Brazilein: Natural red 24 75280 natural 474-07-7: Brilliant Black BN: Food Black 1 28440 diazo 2519-30-4: Brilliant blue FCF: Erioglaucine FD&C Blue No. 1 Acid blue 9 Food blue 2 ...
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Brilliant Black BN (also known as Brilliant Black PN, Brilliant Black A, Black PN, Food Black 1, Naphthol Black, C.I. Food Black 1, or C.I. 28440) is a synthetic black diazo dye. It is soluble in water. It usually comes as tetrasodium salt. It has the appearance of solid, fine powder or granules. Calcium and potassium salts are known as well.
The name is a portmanteau of the acronym VANTA (vertically aligned nanotube arrays) [5] and black. The original Vantablack coating was grown from a chemical vapour deposition process (CVD) and is claimed to be the "world's darkest material" absorbing up to 99.965% of visible light measured perpendicular to the material.