Rose madder is a commercial name that is sometimes used to define red paint made of pigments madder lake , traditional lake pigments extracted from ordinary plaguing plants Rubia tinctorum .
The crazy lake contains two organic red dyes: alizarin and purpurin. As a paint, it has been described as "opaque, transparent, non-sandy, mid-colored pigment, slightly dull in color and in medial solution, darkening into an impermanent and dull red magenta in masstone."
Video Rose madder
Histori
Madder has been grown as a dye since time immemorial in Central Asia, South Asia, and Egypt, where it was planted in the early 1500 BC. Cloths dyed with angry roots dye were found in the tomb of Pharaoh Tutankhamun and on Egyptian tomb paintings from the Graeco-Roman period, diluted with gypsum to produce a pink color. It was also found in ancient Greece (in Corinth), and in Italy in the Baths of Titus and the ruins of Pompeii. It is mentioned in the Talmud as mentioned in the writings of Dioscorides (who call it as ???????????), Hippocrates, and other literary figures, and in works of art in which he is referred to as rubio > and is used in painting by JMW Turner and as a color for ceramics. In Spain, anger was introduced and later cultivated by the Moors.
The production of lake pigments from the more crazy seems first discovered by the ancient Egyptians. Some techniques and recipes are developed. Ideal color is said to come from plants aged 18 to 28 months who have grown in calcareous soil, which is full of chalk and usually chalky. Most were considered relatively weak and very opaque until 1804, when British dye maker George Field perfected the lake-making technique from the angry by treating it with alum and alkali. The resulting angry lake has a less opaque color and can be used more effectively, for example by combining it into paint. During the following years, other metal salts, including those containing chromium, iron, and tin, were found to be used instead of alum to produce other color-based pigments.
In 1827, French chemists Pierre-Jean Robiquet and Colin began producing garancine, a concentrated version of the angry nature. They then discovered that the mad lake contains two dye substances, red alizarin and a faster purpurin fade away. Purpurin is only present in the natural form of anger and gives a generally warmer orange/red tone that pure synthetic alizarin does. Purpurin fluoresces are yellow to red under ultraviolet light, while synthetic alizarin slightly indicates violet. Alizarin was found before purpurin, by heating the soil angry with acid and potassium. Yellow vapor crystallizes into a bright red needle: alizarin. This alizarin concentrate comprises only 1% of the more angry roots.
Natural rose madder supplied half the world in red until 1868, when its alizarin component became the first natural dye synthetically duplicated by Carl GrÃÆ'¤be and Carl Liebermann. Advances in chemical understanding, such as chemical structure, chemical formula, and elemental formulas, help the Berlin-based scientists discover that alizarin has an anthracene base. However, their recipes are not feasible for large-scale production; it requires expensive and volatile substances, especially bromine.
William Perkin, the inventor of mauve, filed a patent in June 1869 for a new way of producing alizarin without bromine. GrÃÆ'¤be, Liebermann, and Heinrich Caro filed a patent for a similar process only one day before Perkin did - but both patents were granted, as Perkin had been sealed first. They divide the market into two: Perkin is sold to the UK market, and scientists from Berlin to the United States and mainland Europe.
Because this synthetic alizarin dye can be produced for a fraction of the cost of natural dyes, it is rapidly replaced by all dye-based dyes that are then used (eg, the red coat of the British army that has been the shadow of a crazy man from the late 17th century to 1870, , often called "Red Turkey"). In turn, alizarin itself has now been largely replaced by the more light-resistant quinacridone pigment originally developed at DuPont in 1958.
It is still produced in the traditional way to meet the demands of the art market.
Maps Rose madder
Other names
- Alizarin Chemical Composition : 1,2 dihydroxyanthraquinone (C14H8O4)
- Alizarin Crimson , a paint very similar in color to Rose Madder Genuine but derived from synthetic Alizarin
- Lacca in robbia , Italian name
- Laque de garance , French name
- Natural Red 9 abbreviated NR9 , Color Index name:
- Purpurin Chemical Composition : 1,2,4 trihydroxyanthraquinone (C14H8O5)
- Rose Madder Genuine , is sometimes used to determine the paint that comes from plant roots that are more angry in the traditional way. It's still produced and used by some people, but it's too opaque for professional artistic use.
- Rose Madder Hue , sometimes used to specify paint made from other pigments but intended to approach the color of angry roses
- Rubia Tinctorum L. , the perennial herb from which angry rose pigments are lowered
- Turkish Red
Substitute
Because all the crazy-based pigments are famous fugitives, artists have long sought a more permanent and lightweight replacement for rosy and alizarin roses. Recommended alternative pigments include:
- Red Antrasiron (PR177), Alizarin's chemical cousin
- Benzamida Carmine (PR176)
- Perylene Maroon (PR179), to mix boring violets
- Pyrrole Rubine (PR264)
- Quinacridone Magenta (PR122), for brighter violets
- Quinacridone Pyrrolodone
- Quinacridone Rose (PV19), for brighter violets
- Quinacridone Violet (PV19), especially dark and reddish varieties In art, entertainment, and media
- O'Brian, Patrick (1973). HMS Surprise (novel) . Ã, Useful fictional crazy Rose Madder is the title of a 1995 novel by Stephen King, in which a woman named Rose Daniels escapes her abusive husband and travels through time by inserting a woman's painting in a tinged robe.
- Madder Red is the 2009 title song by Yeasayer on the Odd Blood album.
- Jonathon Keats uses slow gradations of angry rose oil paintings to record very long light changes in his "millennium camera."
References
Further reading
- "Red oil paint". Paintmaking.com .
Source of the article : Wikipedia
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