cobalt blue

　

WordNet

1. greenish-blue pigment consisting essentially of cobalt oxide and alumina (同)cobalt ultramarine
2. used to signify the Union forces in the American Civil War (who wore blue uniforms); "a ragged blue line"
3. blue color or pigment; resembling the color of the clear sky in the daytime; "he had eyes of bright blue" (同)blueness
4. any of numerous small butterflies of the family Lycaenidae
5. blue clothing; "she was wearing blue"
6. any organization or party whose uniforms or badges are blue; "the Union army was a vast blue"
7. of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky; "Octobers bright blue weather"- Helen Hunt Jackson; "a blue flame"; "blue haze of tobacco smoke" (同)bluish, blueish
8. causing dejection; "a blue day"; "the dark days of the war"; "a week of rainy depressing weather"; "a disconsolate winter landscape"; "the first dismal dispiriting days of November"; "a dark gloomy day"; "grim rainy weather" (同)dark, dingy, disconsolate, dismal, gloomy, grim, sorry, drab, drear, dreary
9. suggestive of sexual impropriety; "a blue movie"; "blue jokes"; "he skips asterisks and gives you the gamy details"; "a juicy scandal"; "a naughty wink"; "naughty words"; "racy anecdotes"; "a risque story"; "spicy gossip" (同)gamy, gamey, juicy, naughty, racy, risque, spicy
10. morally rigorous and strict; "the puritan work ethic"; "puritanic distaste for alcohol"; "she was anything but puritanical in her behavior" (同)puritanic, puritanical
11. turn blue
12. a state of depression; "he had a bad case of the blues" (同)blue devils, megrims, vapors, vapours
13. a type of folksong that originated among Black Americans at the beginning of the 20th century; has a melancholy sound from repeated use of blue notes
14. a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition (同)Co, atomic number 27
15. a process that makes something blue (or bluish) (同)blueing
16. used to whiten laundry or hair or give it a bluish tinge (同)blueing, blue

PrepTutorEJDIC

1. 『青い』,あい色の / 青黒い / 《話》陰気な,憂うつな / 〈U〉『青色』,あい色;青色の着物 / 〈U〉〈C〉青色絵の具,あい色染料 / 《the~》《詩》青空,青い海 / 《the blues》《話》気のふさぎ,うれいの色 / 《the blues》《ときに単数扱い》(ジャズ音楽の)ブルース / …'を'青色にする
2. コバルト(銀白色の金属元素;化学記号はGo)
3. = bluing

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/10/02 23:49:59」(JST)

wiki en

[Wiki en表示]

This article is about the color. For other uses, see Cobalt blue (disambiguation).

Cobalt Blue
A sample of a commercial cobalt blue pigment
Color coordinates
Hex triplet	#0047AB
sRGBB  (r, g, b)	(0, 71, 171)
HSV       (h, s, v)	(215°, 100%, 67%)
Source	[1]
B: Normalized to [0–255] (byte)

Cobalt blue is the cool blue color of the pigments made using cobalt salts of alumina. Cobalt blue pigments are extremely stable, and have historically been used as coloring agents in ceramics, (especially Chinese porcelain), jewelry, and paint. Transparent glasses are tinted with the silica-based cobalt pigment smalt.

Chemically, cobalt blue pigment is a cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl₂O₄. The compound is made by sintering finely ground CoO and Al₂O₃ (alumina) at 1200 °C. Cobalt blue is lighter and less intense than (iron-cyanide based) Prussian blue.

Historical uses and production

Cobalt blue in impure forms had long been used in Chinese porcelain, but it was independently discovered as a pure alumina-based pigment by Louis Jacques Thénard in 1802. Commercial production began in France in 1807. The first recorded use of cobalt blue as a color name in English was in 1777. The leading world manufacturer of cobalt blue in the 19th century was Benjamin Wegner's Norwegian company Blaafarveværket, ("blue colour works" in Dano-Norwegian). Germany was also famous for production, especially the blue colour works (Blaufarbenwerke) in the Ore Mountains of Saxony.

Cobalt blue in human culture

Bristol blue glassware. The color is due to cobalt ions in the glass.

An example of cobalt blue hue (not pure cobalt blue).

Art

• John Varley suggested cobalt blue as a good substitution for ultramarine blue for painting skies.
• Maxfield Parrish, famous partly for the intensity of his skyscapes, used cobalt blue, and cobalt blue is sometimes called Parrish blue as a result.
• Cobalt blue was the primary blue pigment used in Chinese blue and white porcelain for centuries, beginning in the late 8th or early 9th century.

Automobiles

• Several car manufacturers including Jeep and Bugatti have cobalt blue as one paint options Jeep Wrangler Unlimited.

Construction

• Because of its chemical stability in the presence of alkali, cobalt blue is used as a pigment in blue concrete.

Glassmaking

• The blue seen on many glassware pieces is cobalt blue, and it is used widely by artists in many other fields.
• Cobalt glass almost perfectly filters out the bright yellow emission of ionized sodium.

Ophthalmology

• Cobalt blue is used as a filter used in ophthalmoscopes, and is used to illuminate the cornea of the eye following application of fluorescein dye which is used to detect corneal ulcers and scratches.

Sports

• Major League Soccer's Kansas City Wizards have had cobalt blue as the secondary color of its home uniforms since 2008.

Vexilology

• Several countries and a state including the Netherlands, Romania, and Nevada have cobalt blue as one of three shades of their flags.

Video Games

• Sega's official logo color is cobalt blue. Sonic the Hedgehog, Sega's current mascot, was colored to match.

Toxicity

Cobalt blue is toxic when inhaled or ingested. Potters who fail to take adequate precautions when using cobalt blue may succumb to cobalt poisoning.

See also

• List of colors
• Cobalt glass
• Smalt

References

External links

• "History of Cobalt blue". Pigments through the Ages. WebExhibits. 

UpToDate Contents

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English Journal

• A multi-spectroscopic approach to the characterization of early glaze opacifiers: Studies on an Achaemenid glazed brick found at Susa, south-western Iran (mid-first millennium BC).

• Holakooei P.SourceDepartment of Physics and Earth Sciences, University of Ferrara, Ferrara, Italy; Faculty of Conservation, Art University of Isfahan, Isfahan, Iran. Electronic address: parviz.holakooei@unife.it.
• Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy.Spectrochim Acta A Mol Biomol Spectrosc.2013 Dec;116:49-56. doi: 10.1016/j.saa.2013.07.002. Epub 2013 Jul 11.
• This paper presents the results of micro-Raman spectroscopy, energy dispersive X-ray fluorescence (XRF), and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) studies performed on an Achaemenid glazed brick found at Susa (mid-first millennium BC). The results showed that ca
• PMID 23906671

• Red-free light for measurement of intraocular pressure using Goldmann applanation tonometer without fluorescein.

• Ghoneim EM.SourceFaculty of Medicine, Suez Canal University, Ismailia - Egypt.
• European journal of ophthalmology.Eur J Ophthalmol.2013 Nov 20;24(1):84-7. doi: 10.5301/ejo.5000325. Epub 2013 Jul 12.
• Purpose: To evaluate the use of red-free light for the measurement of intraocular pressure (IOP) using a Goldmann applanation tonometer without fluorescein. Methods: This cross-sectional study was carried out on 500 eyes in 250 patients attending the Ophthalmology Outpatient Clinic at Suez Canal Uni
• PMID 23873489

• Versatile UCST-based thermoresponsive hydrogels for loco-regional sustained drug delivery.

• Boustta M, Colombo PE, Lenglet S, Poujol S, Vert M.SourceInstitute For Biomolecules Max Mousseron, Team CRBA, UMR CNRS 5247, University Montpellier 1, Faculty of Pharmacy, 15 Avenue Charles Flahault, BP 14491, 34093 Montpellier Cedex 5, France.
• Journal of controlled release : official journal of the Controlled Release Society.J Control Release.2013 Nov 8;174C:1-6. doi: 10.1016/j.jconrel.2013.10.040. [Epub ahead of print]
• Poly(N-acryloyl glycinamide) is a neutral polymer that can form gel-sol thermoresponsive systems with upper critical solution temperature in aqueous media. The temperature of the reversible gel-sol transition depends on the molar mass and the concentration of macromolecules. These parameters were co
• PMID 24211433

Japanese Journal

• 原料混合条件がCoAl₂O₄の発色に与える影響の検討

• 米田 美佳,吉田 幹生,後藤 邦彰 [他]
• 粉体に関する討論会講演論文集 = Preprint of the Symposium on Powder Science and Technology 51, 1-4, 2013-09-12
• NAID 40019788860

• Structural, Electronic, and Electrochemical Properties of Li

• Takachi Masamitsu,Matsuda Tomoyuki,Moritomo Yutaka
• Jpn J Appl Phys 52(4), 044301-044301-7, 2013-04-25
• … Prussian blue analogues with jungle-gym-type structure are promising candidates for cathode materials of the lithium-ion secondary battery (LIB). … Here, we investigated the structural, electronic, and electrochemical properties of cobalt hexacyanoferrate, Li<inf>x</inf>Co[Fe(CN)<inf>6</inf>]<inf>0.90</inf>2.9H<inf>2</inf>O, against Li concentration (x). …
• NAID 150000106626

• Photoinduced Phase Transition into a Hidden Phase in Cobalt Hexacyanoferrate as Investigated by Time-Resolved X-ray Absorption Fine Structure

• MORITOMO Yutaka,KAMIOKA Hayato,SHIBATA Takayuki [他],Nozawa Shunsuke,Sato Tokushi,Adachi Shin-ichi
• J Phys Soc Jpn 82(3), 033601-033601-3, 2013-03-15
• … Photoinduced dynamics in thin film of cobalt hexacyanoferrate, Na<inf>0.79</inf>Co[Fe(CN)<inf>6</inf>]<inf>0.90</inf>2.9H<inf>2</inf>O, was investigated by time-resolved X-ray absorption fine structure (XAFS) spectroscopy around the Co K edge at 300 K. …
• NAID 40019609182

Related Links

• Cobalt blue - Wikipedia, the free encyclopedia

Cobalt blue is the cool blue color of the pigments made using cobalt salts of alumina. Cobalt blue pigments are extremely stable, and have historically been used as coloring agents in ceramics, (especially Chinese porcelain), jewellery, and ...

• Cobalt blue tarantula - Wikipedia, the free encyclopedia

The cobalt blue tarantula (Haplopelma lividum) is a tarantula species that is native to Myanmar and Thailand. Contents. 1 Description; 2 Habitat; 3 Pets; 4 Notes; 5 External links. [edit] Description. A female (left) and male (right) cobalt blue ...

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★リンクテーブル★

関連記事	「blue」「bluing」「cobalt」

「blue」

　　[★]

• n.

• 青色、青

• adj.

• 青い

関

cyan

　 　 　 　 　 　 　 　 　 　 　

「bluing」

　　[★]

• n.

• ブルーイング、青味付け。反射防止

「cobalt」

　　[★]

コバルト

関

Co