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Gel Pen
A gel pen uses ink in which pigment is Suspension (chemistry), suspended in a water-based gel. Because the ink is thick and Opacity (optics), opaque, it shows up more clearly on slick surfaces than the typical inks used in ballpoint pen, ballpoint or marker pen, felt tip pens. Gel pens can be used for many types of writing and illustration. The general design of a gel pen is similar to that of a regular ballpoint, ink-based pen, with a barrel containing the writing mechanism and a cap, and a reservoir filled with ink. At the end of the ink tube is an ink "follower", made of more viscous gelled material which is usually translucent and follows the water-based ink. The follower mainly prevents leakage and back flow of the ink. The barrels can be created in many different sizes and designs; some have finger grips of rubber or plastic. The size of the nib (pen), nib or pen tip ranges from to . Gel inks Compared to other inks, gel ink has higher melting point viscosity, which sup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyacrylate
An acrylate polymer (also known as acrylic or polyacrylate) is any of a group of polymers prepared from acrylate monomers. These plastics are noted for their transparency, resistance to breakage, and elasticity. Acrylate polymer is commonly used in cosmetics, such as nail polish, as an adhesive. History The first synthesis of acrylic polymer was reported by G. W. A. Kahlbaum in 1880. Acrylic elastomers Acrylic elastomer is a general term for a type of synthetic rubber whose primary component is acrylic acid alkylester ( ethyl or butyl ester). Acrylic elastomer possesses characteristics of heat and oil resistance, with the ability to withstand temperatures of 170–180 °C. It is used primarily for producing oil seals and packaging related to automobiles. Acrylic elastomer can generally be characterized as one of two types. "Old" types include ACM (copolymer of acrylic acid ester and 2-chloroethyl vinyl ether) containing chlorine and ANM (copolymer of acrylic acid ester ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Pen Types, Brands And Companies
A list is a set of discrete items of information collected and set forth in some format for utility, entertainment, or other purposes. A list may be memorialized in any number of ways, including existing only in the mind of the list-maker, but lists are frequently written down on paper, or maintained electronically. Lists are "most frequently a tool", and "one does not ''read'' but only ''uses'' a list: one looks up the relevant information in it, but usually does not need to deal with it as a whole". Lucie Doležalová,The Potential and Limitations of Studying Lists, in Lucie Doležalová, ed., ''The Charm of a List: From the Sumerians to Computerised Data Processing'' (2009). Purpose It has been observed that, with a few exceptions, "the scholarship on lists remains fragmented". David Wallechinsky, a co-author of '' The Book of Lists'', described the attraction of lists as being "because we live in an era of overstimulation, especially in terms of information, and lists help ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Door County
Door County is the easternmost county in the U.S. state of Wisconsin. As of the 2020 census, its population was 30,066. Its seat of government is Sturgeon Bay. It is named after the strait between the Door Peninsula and Washington Island. This dangerous passage, known as Death's Door, contains shipwrecks and was known to Native Americans and early French explorers. The county was created in 1851 and organized in 1861. Nicknamed the "Cape Cod of the Midwest," Door County is a popular Upper Midwest vacation destination. Tourism is a major contributor to Door County's economy. It is Wisconsin's forty-fourth largest county in population, but it is the eighth largest in terms of economic impact from tourism (over $600 million in 2023). The county is considered a high-recreation retirement destination by the U.S. Department of Agriculture. History Native Americans and French Porte des Morts legend Door County's name came from Porte des Morts ("Death's Door"), the passage b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal
A metal () is a material that, when polished or fractured, shows a lustrous appearance, and conducts electrical resistivity and conductivity, electricity and thermal conductivity, heat relatively well. These properties are all associated with having electrons available at the Fermi level, as against nonmetallic materials which do not. Metals are typically ductile (can be drawn into a wire) and malleable (can be shaped via hammering or pressing). A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polythiazyl, polymeric sulfur nitride. The general science of metals is called metallurgy, a subtopic of materials science; aspects of the electronic and thermal properties are also within the scope of condensed matter physics and solid-state chemistry, it is a multidisciplinary topic. In colloquial use materials such as steel alloys are referred to as metals, while others such as polymers, wood or ceramics are nonmetallic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crayola
Crayola LLC, formerly the Binney & Smith Company, is an American manufacturing and retail company specializing in list of art media, art supplies. It is known for its brand ''Crayola'' and best known for its crayons. The company is headquartered in Forks Township, Northampton County, Pennsylvania, Forks Township, Pennsylvania in the Lehigh Valley region of the state. Since 1984, Crayola has been a Wholly Owned Subsidiary, wholly owned subsidiary of Hallmark Cards. Originally an industrial pigment supply company, Crayola soon shifted its focus to art products for home and school use, beginning with chalk, then crayons, followed later by colored pencils, marker pen, markers, paints, modeling clay, and other related goods. All Crayola-branded products are marketed as toxicity, nontoxic and safe for use by children. Most Crayola crayons are manufactured in the United States. Crayola also produces Silly Putty and a line of professional art products under the 'Portfolio Series brand', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sakura Color Products Corporation
is a Japanese manufacturing company headquartered in Morinomiya-chūō, Chūō-ku, Osaka, which produces a variety of stationery products as well a wide range of art materials. Nevertheless, Sakura is mostly known by its marker pens, such as the ''Pigma'' line.Sakura Pigna Micron review by Alan Lee, January 2016 History The company started as a s manufacturer in 1921. By 1924, Sakura invented the first-ever oil pastel that combined oil and pigment, which was patented globally as the "" trademark. In 1982, the firm launched its famous ''Pigma'' marker pen lines.[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thin-Layer Chromatography
Thin-layer chromatography (TLC) is a chromatography technique that separates components in non-volatile mixtures. It is performed on a TLC plate made up of a non-reactive solid coated with a thin layer of adsorbent material. This is called the stationary phase. The sample is deposited on the plate, which is eluted with a solvent or solvent mixture known as the mobile phase (or eluent). This solvent then moves up the plate via capillary action. As with all chromatography, some compounds are more attracted to the mobile phase, while others are more attracted to the stationary phase. Therefore, different compounds move up the TLC plate at different speeds and become separated. To visualize colourless compounds, the plate is viewed under UV light or is stained.Jork, H., Funk, W., Fischer, W., Wimmer, H. (1990): Thin-Layer Chromatography: Reagents and Detection Methods, Volume 1a, VCH, Weinheim, Testing different stationary and mobile phases is often necessary to obtain well-defined an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Ink Library
The International Ink Library and its Digital Ink Library are an FBI forensic database of inks. It is used to identify writing instruments, makes, models, ink types, and document authenticity. It contains over 15,000 samples of pen, marker, and printer inks dating from the 1920s. As part of the FBI Questioned Documents Branch, it is used to investigate criminal and terrorist cases, fraudulent documents, forgeries, checks, money orders, and threats to persons. It uses high-performance thin-layer chromatography, electrophoresis, ultraviolet spectra, electrospray ionization and mass spectrometry. It also analyzes chemical date tags expressly inserted by ink manufacturers. The database originated in the 1960s from the collection of Antonio Cantu, former Chief Forensic Chemist at the Secret Service, which dedicated the lab in his honor. There is no cost to access, but is limited to United States Secret Service, U.S. Secret Service directorates, students through coordinated research i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Secret Service
The United States Secret Service (USSS or Secret Service) is a federal law enforcement agency under the Department of Homeland Security tasked with conducting criminal investigations and providing protection to American political leaders, their families, and visiting heads of state or government. The Secret Service was, until 2003, part of the Department of the Treasury, due to their initial mandate of combating counterfeiting of U.S. currency. The agency has protected U.S. presidents and presidential candidates since 1901. Primary missions The Secret Service is mandated by Congress with two distinct and critical national security missions: protecting the nation's leaders and safeguarding the financial and critical infrastructure of the United States. Protective mission The Secret Service is tasked with ensuring the safety of the president of the United States, the vice president of the United States, the president-elect of the United States, the vice president-elect of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forensic Chemistry
Forensic chemistry is the application of chemistry and its subfield, forensic toxicology, in a legal setting. A forensic chemist can assist in the identification of unknown materials found at a crime scene. Specialists in this field have a wide array of methods and instruments to help identify unknown substances. These include high-performance liquid chromatography, gas chromatography-mass spectrometry, atomic absorption spectroscopy, Fourier transform infrared spectroscopy, and thin layer chromatography. The range of different methods is important due to the destructive nature of some instruments and the number of possible unknown substances that can be found at a scene. Forensic chemists prefer using nondestructive methods first, to preserve evidence and to determine which destructive methods will produce the best results. Along with other forensic specialists, forensic chemists commonly testify in court as expert witnesses regarding their findings. Forensic chemists follow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glitter
Glitter is an assortment of flat, small, reflective particles that are precision cut and come in a variety of shapes, sizes, and colors. Glitter particles resemble confetti, sparkles and sequins, but somewhat smaller. Since prehistoric times, glitter has been made from many different materials including stones such as malachite, and mica, as well as insects and glass. Uses for glitter include clothing, arts, crafts, cosmetics and body paint. Modern glitter is usually manufactured from the Metallised film, combination of aluminum and BoPET, plastic, which is rarely recycled and can find its way into aquatic habitats, eventually becoming ingested by animals, leading some scientists to call for bans on plastic glitter. Antiquity Glittering surfaces have been found to be used since prehistoric times in the arts and in cosmetics. The modern English word "glitter" comes from the Middle English word ''gliteren'', possibly by way of the Old Norse word ''wikt:glitra, glitra.'' Howeve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
