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Sealing Wax
Sealing wax is a wax material of a seal which, after melting, hardens quickly (to paper, parchment, ribbons and wire, and other material) forming a bond that is difficult to separate without noticeable tampering. Wax is used to verify something such as a document is unopened, to verify the sender's identity, for example with a signet ring, and as decoration. Sealing wax can also be used to take impressions of other seals. Wax was used to seal ''letters close'' and later, from about the 16th century, envelopes. Before sealing wax, the Romans used bitumen for this purpose. Composition Formulas vary, but there was a major shift after European trade with the Indies opened. In the Middle Ages sealing wax was typically made of beeswax and "Venice turpentine", a greenish-yellow resinous extract of the European Larch tree. The earliest such wax was uncoloured; later the wax was coloured red with vermilion. From the 16th century it was compounded of various proportions of shellac, turpe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornelis Norbertus Gysbrechts - Quodlibet
Cornelis is a Dutch language, Dutch form of the male given name Cornelius (name), Cornelius. Some common shortened versions of Cornelis in Dutch are Cees, Cor, Corné, Corneel, Crelis, Kees (given name), Kees, Neel and Nelis. Cornelis (Kees) and Johannes (Jan) used to be the most common given names in the Low Countries, and the origin of the term Yankees is commonly thought to derive from the term Yankee#Dutch origin, Jan-Kees for the Dutch settlers in New Netherland. Among the notable persons named Cornelis are: * Cornelis Engebrechtsz (c. 1462–1527), painter from Leiden * Cornelis Massijs (c. 1508–1556), painter from Flanders, Belgium * Cornelis Floris de Vriendt (1513/14-1575), architect and sculptor * Cornelis Cort (c. 1533–1578), engraver and draughtsman * Cornelis Corneliszoon (c. 1550–1607), inventor of the wind powered sawmill * Cor Dillen (c. 1920–2009), director of Philips and their CEO in South America * Cornelis van Haarlem (1562–1638), leading Northern M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plaster
Plaster is a building material used for the protective or decorative coating of walls and ceilings and for Molding (decorative), moulding and casting decorative elements. In English, "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. Another imprecise term used for the material is stucco, which is also often used for plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces. The most common types of plaster mainly contain either gypsum, lime plaster, lime, or cement plaster, cement,Franz Wirsching "Calcium Sulfate" in Ullmann's Encyclopedia of Industrial Chemistry, 2012 Wiley-VCH, Weinheim. but all work in a similar way. The plaster is manufactured as a dry powder and is mixed with water to form a stiff but workable paste immediately before it is applied to the surface. The reaction with water liberates heat through crystallization and the hydrated plaster then ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sealing Wax On Letters
Sealing may refer to: Processes * Seal (emblem), applying a seal to a document for authentication * Sealing wax, a wax material of a seal which, after melting, hardens quickly * Duct sealing, the sealing of leaks in air ducts * Induction sealing, method of heating a metal disk to seal a cap or top on a container * Porosity sealing, the process of filling a porous substrate to make it airtight * Record sealing, the practice of making court records confidential * Sealing compound, sealant, used to block the passage of fluids * Sealing pavers * Searing meat (and other foods), commonly but erroneously referred to as 'sealing in the juices' etc. Religion * Sealing (Mormonism), a ritual intended to make family relationships permanent even after death * Sealing power, in Mormonism * Sealing room Other * ''Sealing the Tomb'', altarpiece triptych by William Hogarth in the English city of Bristol * Seal hunting, personal or commercial hunting of seals See also * Seal (other) * S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Crown
The Crown is the state in all its aspects within the jurisprudence of the Commonwealth realms and their subdivisions (such as the Crown Dependencies, overseas territories, provinces, or states). Legally ill-defined, the term has different meanings depending on context. It is used to designate the monarch in either a personal capacity, as Head of the Commonwealth, or as the king or queen of their realms (whereas the monarchy of the United Kingdom and the monarchy of Canada, for example, are distinct although they are in personal union). It can also refer to the rule of law; however, in common parlance 'The Crown' refers to the functions of government and the civil service. Thus, in the United Kingdom (one of the Commonwealth realms), the government of the United Kingdom can be distinguished from the Crown and the state, in precise usage, although the distinction is not always relevant in broad or casual usage. A corporation sole, the Crown is the legal embodiment of execut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verdigris
Verdigris is the common name for blue-green, copper-based pigments that form a patina on copper, bronze, and brass. The technical literature is ambiguous as to its chemical composition. Some sources refer to "neutral verdigris" as copper(II) acetate monohydrate () and to "blue verdigris" as . Another source describes it as a basic copper carbonate (()2), and, when near the sea, basic copper chloride (Cu2(OH)3Cl). Still other sources describe verdigris as .(Cu(OH)2)n where n varies from 0 to 3. The alchemical symbol for verdigris is 🜨 (unicode U+1F728). Etymology The name ''verdigris'' comes from the Middle English ''vertegrez'', from the Old French ''verte grez'', meaning ''vert d'aigre'', "green ade by action ofvinegar". The modern French writing of this word is ''vert-de-gris'' ("green of grey"), sounding like the older name ''verdet gris'' ("grey greenish"), itself a deformation of ''verte grez''. It was used as a pigment in paintings and other art objects (as green col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead White
White lead is the basic lead carbonate 2PbCO3·Pb(OH)2. It is a complex salt, containing both carbonate and hydroxide ions. White lead occurs naturally as a mineral, in which context it is known as hydrocerussite, a hydrate of cerussite. It was formerly used as an ingredient for lead paint and a cosmetic called Venetian ceruse, because of its opacity and the satiny smooth mixture it made with dryable oils. However, it tended to cause lead poisoning, and its use has been banned in most countries. White lead compounds known as lead soap were also used as additive for lubricants for bearings and in machine shops. Lead soap was also used as an oil drying agent for paints made with drying oil or air drying paints made with alkyd resins. Lead is often used with cobalt driers. Lead free substitutes have been developed to replace this use of lead in paint. History What is commonly known today as the "Dutch method" for the preparation of white lead was described as early as Theoph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamp Black
Carbon black (subtypes are acetylene black, channel black, furnace black, lamp black and thermal black) is a material produced by the incomplete combustion of coal and coal tar, vegetable matter, or petroleum products, including fuel oil, fluid catalytic cracking tar, and ethylene cracking. Carbon black is a form of paracrystalline carbon that has a high surface-area-to-volume ratio, albeit lower than that of activated carbon. It is dissimilar to soot in its much higher surface-area-to-volume ratio and significantly lower (negligible and non-bioavailable) polycyclic aromatic hydrocarbon (PAH) content. However, carbon black can be used as a model compound for diesel soot to better understand how diesel soot behaves under various reaction conditions as carbon black and diesel soot have some similar properties such as particle sizes, densities, and copolymer adsorption abilities that contribute to them having similar behaviours under various reactions such as oxidation experiments. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smalt
Cobalt glass—known as "smalt" when ground as a pigment—is a deep blue coloured glass prepared by including a cobalt compound, typically cobalt oxide or cobalt carbonate, in a glass melt. Cobalt is a very intense colouring agent and very little is required to show a noticeable amount of colour. Cobalt glass plates are used as an optical filter in flame tests to filter out the undesired strong yellow light emitted by traces of sodium, and expand the ability to see violet and blue hues, similar to didymium glass. Moderately ground cobalt glass (potassium cobalt silicate)—called "smalt"—has been historically important as a pigment in glassmaking, painting, pottery, for surface decoration of other types of glass and ceramics, and other media. The long history of its manufacture and use has been described comprehensively. Cobalt aluminate, also known as "cobalt blue", can be used in a similar way. Cobalt glass such as Bristol blue glass is appreciated for its attractive colour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mica
Micas ( ) are a group of silicate minerals whose outstanding physical characteristic is that individual mica crystals can easily be split into extremely thin elastic plates. This characteristic is described as perfect basal cleavage. Mica is common in igneous and metamorphic rock and is occasionally found as small flakes in sedimentary rock. It is particularly prominent in many granites, pegmatites, and schists, and "books" (large individual crystals) of mica several feet across have been found in some pegmatites. Micas are used in products such as drywalls, paints, fillers, especially in parts for automobiles, roofing and shingles, as well as in electronics. The mineral is used in cosmetics and food to add "shimmer" or "frost." Properties and structure The mica group is composed of 37 phyllosilicate minerals. All crystallize in the monoclinic system, with a tendency towards pseudohexagonal crystals, and are similar in structure but vary in chemical composition. Micas are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tomlinson's Cyclopaedia Of Useful Arts
''Tomlinson's Cyclopaedia of Useful Arts'' is a multi-volume encyclopedia focusing on manufacturing, mining, and engineering. It was edited by Charles Tomlinson, a Fellow of the Royal Society, and a lecturer at King's College School, London. The original was published between 1852 and 1854 in two volumes (Vol. 1, 832 pages; Vol. 2, 1,052 pages) with 40 steel engravings and 2,477 woodcuts. A supplement was published in 1862 by James S. Virtue, London and New York City. A new edition was published no earlier than 1866 with the intent of "keeping pace with the varied subjects of the Useful Arts and Manufactures, which are always enlarging their boundaries." Internally the new edition is organized into three volumes of 935, 956, and 740 pages (making it 38% larger than the original edition), but it was sold in various formats, including an eight-volume set. It has 63 full-page steel engravings and 3063 wood engravings (a few of which are a half page), for which the publishing comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Musk
Musk (Persian: مشک, ''Mushk'') is a class of aromatic substances commonly used as base notes in perfumery. They include glandular secretions from animals such as the musk deer, numerous plants emitting similar fragrances, and artificial substances with similar odors. ''Musk'' was a name originally given to a substance with a strong odor obtained from a gland of the musk deer. The substance has been used as a popular perfume fixative since ancient times and is one of the most expensive animal products in the world. The name originates from the Late Greek μόσχος 'moskhos', from Persian 'mushk', similar to Sanskrit मुष्क muṣka ("testicle"), derived from Proto-Indo-European noun ''múh₂s'' meaning "mouse". The deer gland was thought to resemble a scrotum. It is applied to various plants and animals of similar smell (e.g. muskox) and has come to encompass a wide variety of aromatic substances with similar odors, despite their often differing chemical structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambergris
Ambergris ( or , la, ambra grisea, fro, ambre gris), ''ambergrease'', or grey amber is a solid, waxy, flammable substance of a dull grey or blackish colour produced in the digestive system of sperm whales. Freshly produced ambergris has a marine, fecal odor. It acquires a sweet, earthy scent as it ages, commonly likened to the fragrance of Isopropyl alcohol without the vaporous chemical astringency. Ambergris has been highly valued by perfume makers as a fixative that allows the scent to endure much longer, although it has been mostly replaced by synthetic ambroxide. Dogs are attracted to the smell of ambergris and are sometimes used by ambergris searchers. Etymology The word ''ambergris'' comes from the Old French "''ambre gris''" or "grey amber". The word "amber" comes from the same source, but it has been applied almost exclusively to fossilized tree resins from the Baltic region since the late 13th century in Europe. Furthermore, the word "amber" is derived from the Mid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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