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Crimson
Crimson is a rich, deep red color, inclining to purple. It originally meant the color of the kermes dye produced from a scale insect, '' Kermes vermilio'', but the name is now sometimes also used as a generic term for slightly bluish-red colors that are between red and rose. It is the national color of Nepal. History Crimson (NR4) is produced using the dried bodies of a scale insect, ''Kermes'', which were gathered commercially in Mediterranean countries, where they live on the kermes oak, and sold throughout Europe. Kermes dyes have been found in burial wrappings in Anglo-Scandinavian York. They fell out of use with the introduction of cochineal, also made from scale insects, because although the dyes were comparable in quality and color intensity, it needed ten to twelve times as much kermes to produce the same effect as cochineal. Carmine is the name given to the dye made from the dried bodies of the female cochineal, although the name crimson is sometimes applie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Symbols Of Nepal
Nepal, officially the Federal Democratic Republic of Nepal, is a landlocked sovereign state located in South Asia between two countries; China by the north and India by the east, west and south. The national symbols of Nepal according to the New Constitutions of Nepal 2072 are: Bird The Himalayan monal (''Lophophorus impejanus'') also known as the impeyan monal, impeyan pheasant or danfe is a bird of the genus ''Lophophorus'' of the pheasant family, Phasianidae. It is the national bird of Nepal, where it is known as the danfe in Nepali. It gives 4 to 6 eggs at time after 27 days of conception. It is found in himalayan region where small bushes and rhododendron is available. Emblem The emblem of Nepal was changed during the reconciliation period following the Nepalese Civil War. On 30 December 2006, a new coat of arms was introduced. It contains the flag of Nepal, Mount Everest, green hills symbolising the hilly regions of Nepal and yellow colour symbolising the fertile Terai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nepal
Nepal (; ne, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne, सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in South Asia. It is mainly situated in the Himalayas, but also includes parts of the Indo-Gangetic Plain, bordering the Tibet Autonomous Region of China to the north, and India in the south, east, and west, while it is narrowly separated from Bangladesh by the Siliguri Corridor, and from Bhutan by the Indian state of Sikkim. Nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the world's ten tallest mountains, including Mount Everest, the highest point on Earth. Nepal is a multi-ethnic, multi-lingual, multi-religious and multi-cultural state, with Nepali as the official language. Kathmandu is the nation's capital and the largest city. The name "Nepal" is first recorded in texts from the Vedic period of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kermes (genus)
''Kermes'' is a genus of scale insects in the order Hemiptera. They feed on the sap of evergreen oaks; the females produce a red dye, also called " kermes", that is the source of natural crimson. The word "kermes" is derived from Persian or Turkish ''qirmiz'' or ''kirmizi'' ( قرمز), "crimson" (both the colour and the dyestuff). There are some 20 species, including: * ''Kermes bacciformis'' Leonardi, 1908 * ''Kermes corticalis'' (Nassonov, 1908) * '' Kermes echinatus'' (Balachowsky, 1953) * ''Kermes gibbosus'' Signoret, 1875 * '' Kermes ilicis'' (Linnaeus, 1758) * ''Kermes roboris Kermes may refer to : * ''Kermes'' (genus), a genus of insects * Kermes (dye), a red dye made from the bodies of Kermes insects * Kermes oak also called ''Quercus coccifera'', the tree on which the Kermes insects traditionally fed * Alchermes, a ...'' (Fourcroy, 1785) * '' Kermes vermilio'' Planchon, 1864 References External links Conservation and Art Material Encyclopedia Online K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scale Insect
Scale insects are small insects of the order Hemiptera, suborder Sternorrhyncha. Of dramatically variable appearance and extreme sexual dimorphism, they comprise the infraorder Coccomorpha which is considered a more convenient grouping than the superfamily Coccoidea due to taxonomic uncertainties. Adult females typically have soft bodies and no limbs, and are concealed underneath domed scales, extruding quantities of wax for protection. Some species are hermaphroditic, with a combined ovotestis instead of separate ovaries and testes. Males, in the species where they occur, have legs and sometimes wings, and resemble small flies. Scale insects are herbivores, piercing plant tissues with their mouthparts and remaining in one place, feeding on sap. The excess fluid they imbibe is secreted as honeydew on which sooty mold tends to grow. The insects often have a mutualistic relationship with ants, which feed on the honeydew and protect them from predators. There are about 8,000 de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kermes (insect)
''Kermes'' is a genus of scale insects in the order Hemiptera. They feed on the sap of evergreen oaks; the females produce a red dye, also called " kermes", that is the source of natural crimson Crimson is a rich, deep red color, inclining to purple. It originally meant the color of the kermes dye produced from a scale insect, '' Kermes vermilio'', but the name is now sometimes also used as a generic term for slightly bluish-red c .... The word "kermes" is derived from Persian or Turkish ''qirmiz'' or ''kirmizi'' ( قرمز), "crimson" (both the colour and the dyestuff). There are some 20 species, including: * '' Kermes bacciformis'' Leonardi, 1908 * '' Kermes corticalis'' (Nassonov, 1908) * '' Kermes echinatus'' (Balachowsky, 1953) * '' Kermes gibbosus'' Signoret, 1875 * '' Kermes ilicis'' (Linnaeus, 1758) * '' Kermes roboris'' (Fourcroy, 1785) * '' Kermes vermilio'' Planchon, 1864 References External links Conservation and Art Material Encyclopedia Online ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sienna
Sienna (from it, terra di Siena, meaning "Siena earth") is an earth pigment containing iron oxide and manganese oxide. In its natural state, it is yellowish brown and is called raw sienna. When heated, it becomes a reddish brown and is called burnt sienna.''Shorter Oxford English Dictionary'', 5th Edition (2002) It takes its name from the city-state of Siena, where it was produced during the Renaissance. Along with ochre and umber, it was one of the first pigments to be used by humans, and is found in many cave paintings. Since the Renaissance, it has been one of the brown pigments most widely used by artists. The first recorded use of ''sienna'' as a color name in English was in 1760. The normalized color coordinates for sienna are identical to kobe, first recorded as a color name in English in 1924. Earth colors Like the other earth colors, such as yellow ochre and umber, sienna is a clay containing iron oxide, called limonite, which in its natural state has a yello ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Liebermann
Carl Theodore Liebermann (23 February 1842 – 28 December 1914) was a German chemist and student of Adolf von Baeyer. Life Liebermann first studied at the University of Heidelberg where Robert Wilhelm Bunsen was teaching. He then joined the group of Adolf von Baeyer at the University of Berlin where he received his PhD in 1865. Together with Carl Gräbe, Liebermann synthesised the orange-red dye alizarin in 1868. After his habilitation in 1870 he became professor at the University of Berlin after Adolf von Baeyer left for the University of Strasbourg. Shortly after Liebermann retired, in 1914, he died. Work In 1826, the French chemist Pierre Jean Robiquet had isolated from the root of a plant, madder, and defined the structure of, alizarin, a remarkable red dye. Liebermann's 1868 discovery that alizarin can be reduced to form anthracene, which is an abundant component in coal tar, opened the road for synthetic alizarin. The patent of Liebermann and Carl Gräbe for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madder Lake
Alizarin (also known as 1,2-dihydroxyanthraquinone, Mordant Red 11, C.I. 58000, and Turkey Red) is an organic compound with formula that has been used throughout history as a prominent red dye, principally for dyeing textile fabrics. Historically it was derived from the roots of plants of the madder genus.The primary madder species from which alizarin historically has been obtained is ''Rubia tinctorum''. See also In 1869, it became the first natural dye to be produced synthetically. Alizarin is the main ingredient for the manufacture of the madder lake pigments known to painters as rose madder and alizarin crimson. Alizarin in the most common usage of the term has a deep red color, but the term is also part of the name for several related non-red dyes, such as Alizarine Cyanine Green and Alizarine Brilliant Blue. A notable use of alizarin in modern times is as a staining agent in biological research because it stains free calcium and certain calcium compounds a red or li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alum
An alum () is a type of chemical compound, usually a hydrated double sulfate salt of aluminium with the general formula , where is a monovalent cation such as potassium or ammonium. By itself, "alum" often refers to potassium alum, with the formula . Other alums are named after the monovalent ion, such as sodium alum and ammonium alum. The name "alum" is also used, more generally, for salts with the same formula and structure, except that aluminium is replaced by another trivalent metal ion like chromium, and/or sulfur is replaced by another chalcogen like selenium. The most common of these analogs is chrome alum . In most industries, the name "alum" (or "papermaker's alum") is used to refer to aluminium sulfate, , which is used for most industrial flocculation (the variable is an integer whose size depends on the amount of water absorbed into the alum). In medicine, "alum" may also refer to aluminium hydroxide gel used as a vaccine adjuvant. History Alum found at a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ochre
Ochre ( ; , ), or ocher in American English, is a natural clay earth pigment, a mixture of ferric oxide and varying amounts of clay and sand. It ranges in colour from yellow to deep orange or brown. It is also the name of the colours produced by this pigment, especially a light brownish-yellow. A variant of ochre containing a large amount of hematite, or dehydrated iron oxide, has a reddish tint known as "red ochre" (or, in some dialects, ruddle). The word ochre also describes clays coloured with iron oxide derived during the extraction of tin and copper. Earth pigments Ochre is a family of earth pigments, which includes yellow ochre, red ochre, purple ochre, sienna, and umber. The major ingredient of all the ochres is iron(III) oxide-hydroxide, known as limonite, which gives them a yellow colour. * Yellow ochre, , is a hydrated iron hydroxide (limonite) also called gold ochre. * Red ochre, , takes its reddish colour from the mineral hematite, which is an anhydrous i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Web Colors
Web colors are colors used in Web design, displaying web pages on the World Wide Web, and the methods for describing and specifying those colors. Colors may be specified as an RGB color model, RGB triplet or in hexadecimal format (a ''hex triplet'') or according to their common English names in some cases. A color tool or other graphics software is often used to generate color values. In some uses, hexadecimal color codes are specified with notation using a leading number sign (#). A color is specified according to the intensity of its red, green and blue components, each represented by eight bits. Thus, there are 24 bits used to specify a web color within the sRGB gamut, and 16,777,216 colors that may be so specified. Colors outside the sRGB gamut can be specified in Cascading Style Sheets by making one or more of the red, green and blue components negative or greater than 100%, so the color space is theoretically an unbounded extrapolation of sRGB similar to scRGB. Specifying a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umber
Umber is a natural brown earth pigment that contains iron oxide and manganese oxide. In its natural form, it is called raw umber. When calcined, the color becomes warmer and it becomes known as burnt umber. Its name derives from ''terra d'ombra'', or earth of Umbria, the Italian name of the pigment. Umbria is a mountainous region in central Italy where the pigment was originally extracted. The word also may be related to the Latin word ''umbra'', meaning "shadow". Umber is not one precise color, but a range of different colors, from medium to dark in value, from greenish to reddish in hue. The color of the natural earth depends primarily upon the proportions of iron oxide and manganese in the clay. Umber earth pigments contain between five and twenty percent manganese oxide, which accounts for their being a darker and less saturated color than the related earth pigment, sienna. Commercial umber pigments vary in color depending on their origin and how they are processed. Not a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
