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Purple of Cassius is a purple pigment formed by the reaction of gold salts with tin (II) chloride. It has been used to impart glass with a red coloration (see cranberry glass ), as well as to determine the presence of gold as a chemical test . Generally, the preparation of this material involves gold being dissolved in aqua regia, then reacted ...
List of reagent testing color charts. It is advised to check the references for photos of reaction results. [1] Reagent testers might show the colour of the desired substance while not showing a different colour for a more dangerous additive. [2] For this reason it is essential to use multiple different tests to show all adulterants.
Lüscher color test. The Lüscher color test is a psychological test invented by Max Lüscher in Basel, Switzerland, first published in 1947 in German and first translated to English in 1969. The simplest form of the test instructs a subject to order a series of 8 colors in order of preference. This test claims that the order of preference can ...
Dazzle camouflage, also known as razzle dazzle (in the U.S.) or dazzle painting, is a family of ship camouflage that was used extensively in World War I, and to a lesser extent in World War II and afterwards. Credited to the British marine artist Norman Wilkinson, though with a rejected prior claim by the zoologist John Graham Kerr, it ...
Kayla Oaddams/WireImage Halle Bailey was majestic on the red carpet at The Color Purple premiere. Bailey, 23, graced the Wednesday, December 6, event in a billowing gown by Off-White.
The Munsell color system, showing: a circle of hues at value 5 chroma 6; the neutral values from 0 to 10; and the chromas of purple-blue (5PB) at value 5. In colorimetry, the Munsell color system is a color space that specifies colors based on three properties of color: hue (basic color), value ( lightness ), and chroma (color intensity).
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Mecke reagent. The Mecke reagent is used as a simple spot-test to presumptively identify alkaloids as well as other compounds. It is composed of a mixture of selenous acid and concentrated sulfuric acid, [1] which is dripped onto the substance being tested. The United States Department of Justice method for producing the reagent is the addition ...
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