|
Cadmium Red
Cadmium pigments are a class of pigments that contain cadmium. Most of the cadmium produced worldwide has been for use in rechargeable nickel–cadmium batteries, which have been replaced by other rechargeable nickel-chemistry cell varieties such as NiMH cells, but about half of the remaining consumption of cadmium, which is approximately annually, is used to produce colored cadmium pigments. The principal pigments are a family of yellow, orange and red cadmium sulfides and sulfoselenides, as well as compounds with other metals. Cadmium is toxic to humans and other animals in very small amounts, especially when it is inhaled, which often happens when working with powdered pigment or breathing the dust from chalk pastels. As a result, it is not appropriate for children to use any art supplies that contain cadmium pigments. However, because the pigments have some desirable qualities, such as resistance to fading, some adult artists continue to use them. Artists' paints ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pigment
A pigment is a powder used to add or alter color or change visual appearance. Pigments are completely or nearly solubility, insoluble and reactivity (chemistry), chemically unreactive in water or another medium; in contrast, dyes are colored substances which are soluble or go into solution at some stage in their use. Dyes are often organic compounds whereas pigments are often inorganic compound, inorganic. Pigments of prehistoric and historic value include ochre, charcoal, and lapis lazuli. Economic impact In 2006, around 7.4 million tons of inorganic chemistry, inorganic, organic chemistry, organic, and special pigments were marketed worldwide. According to an April 2018 report by ''Bloomberg Businessweek'', the estimated value of the pigment industry globally is $30 billion. The value of titanium dioxide – used to enhance the white brightness of many products – was placed at $13.2 billion per year, while the color Ferrari red is valued at $300 million each yea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenium
Selenium is a chemical element; it has symbol (chemistry), symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black solid, and a grey metallic-looking form. It seldom occurs in this elemental state or as pure ore compounds in Earth's crust. Selenium ( ) was discovered in 1817 by , who noted the similarity of the new element to the previously discovered tellurium (named for the Earth). Selenium is found in :Sulfide minerals, metal sulfide ores, where it substitutes for sulfur. Commercially, selenium is produced as a byproduct in the refining of these ores. Minerals that are pure selenide or selenate compounds are rare. The chief commercial uses for selenium today are glassmaking and pigments. Selenium is a semiconductor and is used in photocells. Applications in electronics, once important, have been mostly replaced with silicon semiconductor devices. Selenium is still used in a few types of Direct current, DC power surge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PubChem
PubChem is a database of Chemistry, chemical molecules and their activities against biological assays. The system is maintained by the National Center for Biotechnology Information (NCBI), a component of the National Library of Medicine, which is part of the United States National Institutes of Health (NIH). PubChem can be accessed for free through a web user interface. Millions of compound structures and descriptive datasets can be freely downloaded via FTP. PubChem contains multiple substance descriptions and small molecules with fewer than 100 atoms and 1,000 bonds. More than 80 database vendors contribute to the growing PubChem database. History PubChem was released in 2004 as a component of the Molecular Libraries Program (MLP) of the NIH. As of November 2015, PubChem contains more than 150 million depositor-provided substance descriptions, 60 million unique chemical structures, and 225 million biological activity test results (from over 1 million assay experiments performe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lampworking
Lampworking is a type of glasswork in which a Blowtorch, torch or lamp is used to melt the glass. Once in a molten state, the glass is formed by blowing and shaping with tools and hand movements. It is also known as flameworking or torchworking, as the modern practice no longer uses Oil lamp, oil-fueled lamps. Although lack of a precise definition for lampworking makes it difficult to determine when this technique was first developed, the earliest verifiable lampworked glass is probably a collection of beads thought to date to the fifth century Common Era, BCE. Lampworking became widely practiced in Murano, Italy in the 14th century. As early as the 17th century, itinerant glassworkers demonstrated lampworking to the public. In the mid-19th century lampwork technique was extended to the production of paperweights, primarily in France, where it became a popular art form, still collected today. Lampworking differs from glassblowing in that glassblowing uses a furnace as the primary h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Borosilicate Glass
Borosilicate glass is a type of glass with silica and boron trioxide as the main glass-forming constituents. Borosilicate glasses are known for having very low coefficients of thermal expansion (≈3 × 10−6 K−1 at 20 °C), making them more resistant to thermal shock than any other common glass. Such glass is subjected to less thermal stress and can withstand temperature differentials without fracturing of about . It is commonly used for the construction of reagent bottles and flasks, as well as lighting, electronics, and cookware. For many other applications, soda-lime glass is more common. Borosilicate glass is sold under various trade names, including Borosil, Duran, Pyrex, Glassco, Supertek, Suprax, Simax, Bellco, Marinex (Brazil), BSA 60, BSC 51 (by NIPRO), Heatex, Endural, Schott, Refmex, Kimax, Gemstone Well, United Scientific, and MG (India). Single-ended self-starting lamps are insulated with a mica disc and contained in a borosilicate glass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadmium Color Rods
Cadmium is a chemical element; it has symbol Cd and atomic number 48. This soft, silvery-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. Cadmium and its congeners in group 12 are often not considered transition metals, in that they do not have partly filled ''d'' or ''f'' electron shells in the elemental or common oxidation states. The average concentration of cadmium in Earth's crust is between 0.1 and 0.5 parts per million (ppm). It was discovered in 1817 simultaneously by Stromeyer and Hermann, both in Germany, as an impurity in zinc carbonate. Cadmium occurs as a minor component in most zinc ores and is a byproduct of zinc production. It was used for a long time in the 1900s as a corrosion-resistant plating on steel, and cadmium compounds are used as red, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heritage Science
Heritage science is the interdisciplinary domain of scientific study of Cultural heritage, cultural and natural heritage. Heritage science draws on diverse humanities, sciences and engineering disciplines. It focuses on enhancing the understanding, care and sustainable use of heritage so it can enrich people's lives, both today and in the future. Heritage science is an umbrella term encompassing all forms of scientific enquiry into human works and the combined works of nature and humans, of value to people. The above definition was developed though a community consultation organised by ICCROM and the European Research Infrastructure for Heritage Science in 2019. The term has become widely used after 2006, when it became increasingly evident that the more traditional terms Conservation science (cultural property), conservation science or preservation science inadequately reflected the breadth of research into cultural heritage. Heritage scientists in museums, galleries, libraries, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of the longest-running newspapers in the United States, the ''Times'' serves as one of the country's Newspaper of record, newspapers of record. , ''The New York Times'' had 9.13 million total and 8.83 million online subscribers, both by significant margins the List of newspapers in the United States, highest numbers for any newspaper in the United States; the total also included 296,330 print subscribers, making the ''Times'' the second-largest newspaper by print circulation in the United States, following ''The Wall Street Journal'', also based in New York City. ''The New York Times'' is published by the New York Times Company; since 1896, the company has been chaired by the Ochs-Sulzberger family, whose current chairman and the paper's publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Joy Of Painting
''The Joy of Painting'' is an American half-hour instructional television show. Created and hosted by painter Bob Ross, it ran from January 11, 1983, to May 17, 1994. In most episodes, Ross taught techniques for landscape oil painting, completing a painting in each session. Occasionally, episodes featured a guest artist who would demonstrate a different painting technique. The program followed the same format as its predecessor from 1974 to 1982, '' The Magic of Oil Painting'', hosted by Ross's mentor Bill Alexander. In 2024, new episodes featuring paintings Ross had completed before his death and hosted by Nicholas Hankins were released. Production The show was aired and produced by non-commercial, public television stations. The first season aired in early 1983 and was produced by WNVC in Falls Church, Virginia. Starting in the second season in late 1983, the show was produced by WIPB in Muncie, Indiana, until its end in 1994, and later by Blue Ridge Public Television in Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Television Program
A television show, TV program (), or simply a TV show, is the general reference to any content produced for viewing on a television set that is broadcast via Terrestrial television, over-the-air, Satellite television, satellite, and cable television, cable, or Digital distribution, distributed digitally on Over-the-top media service, streaming platforms. This generally excludes breaking news or Television advertisement, advertisements that are aired between shows or between segments of a show. A regularly recurring show is called a television series, and an individual segment of such a series is called an episode. Content is produced either in-house on a television stage with multiple cameras or produced by contract with film production companies. Episodes are usually broadcast in annual sets, which are called seasons in North America and series in other regions. A one-off television show may be called a television special, while a short series of episodes is a miniseries. A t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bob Ross
Robert Norman Ross (October 29, 1942 – July 4, 1995) was an American painter and art instructor who created and hosted '' The Joy of Painting'', an instructional television program that aired from 1983 to 1994 on PBS in the United States, CBC in Canada, and similar channels in Latin America, Europe and elsewhere. Early life Ross was born in Daytona Beach, Florida, to Jack and Ollie Ross, a carpenter and a waitress respectively, and raised in Orlando, Florida. As an adolescent, Ross cared for injured animals, including armadillos, snakes, alligators and squirrels, one of which was later featured in several episodes of his television show. He had a half-brother Jim, whom he mentioned in passing on his show. Ross dropped out of high school in the 9th grade. While working as a carpenter with his father, he lost part of his left index finger, which did not affect his ability to later hold a palette while painting. Military career In 1961, 18-year-old Ross enlisted in the Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vermilion
Vermilion (sometimes vermillion) is a color family and pigment most often used between antiquity and the 19th century from the powdered mineral cinnabar (a form of mercury sulfide). It is synonymous with red orange, which often takes a modern form, but is 11% brighter (at full brightness). Etymology and common name Used first in English in the 13th century, the word ''vermilion'' came from the Old French word ''vermeillon'', which was derived from ''vermeil'', from the Latin ''vermiculus'' the diminutive of the Latin word ''vermis'' for worm. The name originated because it had a similar color to the Kermes (dye), natural red dye made from an insect, '' Kermes vermilio'', which was widely used in Europe. The first recorded use of "vermilion" as a color name in English was in 1289. The term cinnabar is used in mineralogy and crystallography for the red crystalline form of mercury sulfide HgS. Thus, the natural mineral pigment is called "cinnabar", and its synthetic form i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
