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Gel Pen
A gel pen uses ink in which pigment is suspended in a water-based gel. Because the ink is thick and opaque, it shows up more clearly on slick surfaces than the typical inks used in ballpoint or 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 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 or pen tip ranges from to . Gel inks Compared to other inks, gel ink has higher melting point viscosity, which supports a higher proportion of pigments in the medium. The pigments are typically copper ... [...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 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Pen Types, Brands And Companies
A pen is a handheld device used to apply ink to a surface, usually paper, for writing or drawing. Additional types of specialized pens are used in specific types of applications and environments such as in artwork, electronics, digital scanning and spaceflight, and computing. The following is a list of pen types, brands and/or manufacturing companies of those writing implements. Related items are listed as well. Types * Active * Ballpoint * Counter * Counterfeit banknote detection * Decoder * Demonstrator * Digital * Dip * Flex nibs * Flux * Fountain * Fudepen (or "brush pen") * Gel * Marker pen, also known as a felt-tip pen ** Connector pen ** Highlighter ** Mean Streak ** Paint ** Permanent * Qalam * Quill * Rastrum * Reed pen ** Kalamos ** Qalam * Rollerball * Ruling * Skin pens * Space Pen * Technical pen Inventors * Alfred Dunhill * George Safford Parker * László Bíró * Lewis Waterman * Petrache Poenaru * Walter A. Sheaffer Brands Related ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal
A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets). These properties are the result of the ''metallic bond'' between the atoms or molecules of the metal. A metal may be a chemical element such as iron; an alloy such as stainless steel; or a molecular compound such as polymeric sulfur nitride. In physics, a metal is generally regarded as any substance capable of conducting electricity at a temperature of absolute zero. Many elements and compounds that are not normally classified as metals become metallic under high pressures. For example, the nonmetal iodine gradually becomes a metal at a pressure of between 40 and 170 thousand times atmospheric pressure. Equally, some materials regarded as metals ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crayola
Crayola LLC, formerly the Binney & Smith Company, is an American manufacturing company specializing in art supplies. It is known for its brand ''Crayola'' and best known for its crayons. The company is headquartered in Forks Township, Pennsylvania in the Lehigh Valley region of the state. Since 1984, Crayola has been a 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, markers, paints, modeling clay, and other related goods. All Crayola-branded products are marketed as 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', including acrylics, watercolor, tempera, and brushes. Crayola, LLC claims the Crayola brand has 99% name recognition in U. ... [...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 2016Sakura Pigma: a comprehensive guide on JetPens History The company started as a s manufacturer in 1921. By 1924, Sakura invented the first-ever oil pastel th ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thin-Layer Chromatography
Thin-layer chromatography (TLC) is a chromatography technique used to separate non-volatile mixtures. Thin-layer chromatography is performed on a sheet of an inert substrate such as glass, plastic, or aluminium foil, which is coated with a thin layer of adsorbent material, usually silica gel, aluminium oxide (alumina), or cellulose. This layer of adsorbent is known as the stationary phase. After the sample has been applied on the plate, a solvent or solvent mixture (known as the mobile phase) is drawn up the plate via capillary action. Because different analytes ascend the TLC plate at different rates, separation is achieved. It may be performed on the analytical scale as a means of monitoring the progress of a reaction, or on the preparative scale to purify small amounts of a compound. TLC is an analytical tool widely used because of its simplicity, relative low cost, high sensitivity, and speed of separation. TLC functions on the same principle as all chromatography: a com ... [...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 U.S. Secret Service directorates, students through coordinated research initiatives, and law enforcemen ... [...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 charged with conducting criminal investigations and protecting U.S. political leaders, their families, and visiting heads of state or government. Until 2003, the Secret Service was part of the Department of the Treasury, as the agency was founded in 1865 to combat the then-widespread counterfeiting of U.S. currency. 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 the United States, and their immediate families; former presidents, their sp ... [...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 small, reflective particles that come in a variety of shapes, sizes, and colors. Glitter particles reflect light at different angles, causing the surface to sparkle or shimmer. Glitter is similar to 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. Modern glitter is usually manufactured from the combination of aluminum and plastic which is rarely recycled 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 '' glitra.'' However, as early as 30,000 years ago, mica flakes were used to give cave paintings a glittering appearance. Prehistoric humans are believed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metallic Color
A metallic color is a color that appears to be that of a polished metal. The visual sensation usually associated with metals is its metallic shine. This cannot be reproduced by a simple solid color, because the shiny effect is due to the material's brightness varying with the surface angle to the light source. In addition, there is no mechanism for showing metallic or fluorescent colors on a computer without resorting to rendering software which simulates the action of light on a shiny surface. Consequently in art and in heraldry one would normally use a metallic paint that glitters like a real metal. For example, to create a painting that gave the impression of gold appearing in the painting, a metallic paint that glitters in an approximation of real gold would be used; a solid color does not aesthetically "read" as gold. Especially in sacral art in Christian churches, real gold (as gold leaf) was used for rendering gold in paintings, e.g. for the halo of saints. Gold can also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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