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ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)
(This abbreviation is sometimes mistakenly thought to be CL, due to the font used to display it.) The generic name lists first the class of dye (acid dye, disperse dye, etc.), then its hue (e.g., orange), followed by a number assigned by the Colour Index, in chronological order (e.g., Acid Orange 5, Acid Orange 6, Acid Orange 7). [3]
A dye-works with baskets of dyestuffs, skeins of dyed yarn, and heated vats for dyeing, in Odisha, India. Natural alum (aluminum sulfate) has been the most common metallic salt mordant for millennia (see Papyrus Graecus Holmiensis , mordant and dye recipes start at recipe #84), but tin ( stannous chloride ), copper ( cupric sulfate ), iron ...
Orcein is a reddish-brown dye, orchil is a purple-blue dye. Orcein is also used as a stain in microscopy to visualize chromosomes, [10] elastic fibers, [11] Hepatitis B surface antigens, [12] and copper-associated proteins. [13] Orcein is not approved as a food dye (banned in Europe since January 1977), with E number E121 before 1977 and E182 ...
The production and improvement of colorants was a driver of the early synthetic chemical industry, in fact many of today's largest chemical producers started as dye-works in the late 19th or early 20th centuries, including Bayer AG(1863). [2]
During the last two decades of the 17th century and the earlier ones of the 18th new dye works were started in France, Germany, Switzerland and Austria. It was only in 1738 that calico printing was first, practiced in Scotland, and not until twenty-six years later that Messrs Clayton of Bamber Bridge , near Preston , established in 1764 the ...
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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
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