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Sealing Wax
Sealing wax is a wax material of a seal (emblem), seal which, after melting, hardens quickly (to paper, parchment, ribbons and wire, and other material), forming a bond that is difficult to break without noticeable tampering. Wax is used to verify that something such as a document is unopened, to verify the sender's identity (for example with a Stamp seal, seal stamp or Seal (emblem)#Signet rings, 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. Long before sealing wax was employed, 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 wax of this kind was uncoloured. Later the wax was coloured ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cornelis Norbertus Gysbrechts - Quodlibet
Cornelis is a Dutch form of the male given name Cornelius. Some common shortened versions of Cornelis in Dutch are Cees, Cor, Corné, Corneel, Crelis, 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 Jan-Kees for the Dutch settlers in New Netherland. Among the notable persons named Cornelis are: * Cornelis Engebrechtsz (1527), painter from Leiden * Cornelis Massijs (1556), painter from Flanders, Belgium * Cornelis Floris de Vriendt (1513/14-1575), architect and sculptor * Cornelis Cort (1578), engraver and draughtsman * Cornelis Corneliszoon (1607), inventor of the wind powered sawmill * Cor Dillen (2009), director of Philips and their CEO in South America * Cornelis van Haarlem (1562–1638), leading Northern Mannerist painter * Cornelis de Houtman (1565–1599), explorer who started the Dutch spice trade * Cornelis Drebbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chalk
Chalk is a soft, white, porous, sedimentary carbonate rock. It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor. Chalk is common throughout Western Europe, where deposits underlie parts of France, and steep cliffs are often seen where they meet the sea in places such as the Dover cliffs on the Kent coast of the English Channel. Chalk is mined for use in industry, such as for quicklime, bricks and builder's putty, and in agriculture, for raising pH in soils with high acidity. It is also used for " blackboard chalk" for writing and drawing on various types of surfaces, although these can also be manufactured from other carbonate-based minerals, or gypsum. Description Chalk is a fine-textured, earthy type of limestone distinguished by its light colour, softness, and high porosity. It is composed mostly of tiny fragments of the calcite shells or sk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Crown
The Crown is a political concept used in Commonwealth realms. Depending on the context used, it generally refers to the entirety of the State (polity), state (or in federal realms, the relevant level of government in that state), the executive government specifically or only to the monarch and their Viceroy, direct representatives. The term can be used to refer to the rule of law; or to the functions of executive (government), executive (the Crown-King-in-Council, in-council), legislative (the Crown-in-parliament), and judicial (the Crown on the bench) governance and the civil service. The concept of the Crown as a corporation sole developed first in the Kingdom of England as a separation of the physical crown and property of the kingdom from the person and personal property of the monarch. It spread through English and later British colonisation and developed into an imperial crown, which rooted it in the legal lexicon of all 15 Commonwealth realms, their various dependencies, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Verdigris
Verdigris () is a common name for any of a variety of somewhat toxic copper salt (chemistry), salts of acetic acid, which range in colour from green to a blue-green, bluish-green depending on their chemical composition.H. Kühn, Verdigris and Copper Resinate, in Artists' Pigments. A Handbook of Their History and Characteristics, Vol. 2: A. Roy (Ed.) Oxford University Press 1993, p. 131 – 158 Once used as a medicine and pharmaceutical preparation, verdigris occurs naturally, creating a patina on copper, bronze, and brass, and is the main component of a historic green pigment used for artistic purposes from antiquity until the late 20th century, including in Easel, easel painting, polychromatic sculptures, and illumination of maps. However, due to its instability, its popularity declined as other green pigments became readily available. The instability of its appearance stems from its Hydration number, hydration level and Base (chemistry), basicity, which change as the pigment inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead White
Lead white is a thick, opaque, and heavy white pigment composed primarily of basic lead carbonate, , with a crystalline molecular structure. It was the most widely produced and used white pigment in different parts of the world from antiquity until the nineteenth century, when it was displaced by zinc white and later by titanium white. Lead white has maintained relatively consistent production methods across times and regions, yet it has a wide range of applications in different contexts, such as home decoration, art production, and cosmetics. Given its affordability and distinctive visual qualities, lead white was particularly favored and generously used by artists in their paintings. However, most art supply companies now explicitly advise against the use of lead white because of the risk that it poses of lead poisoning. Even after this drawback was known, it continued to be used in paintings and cosmetics. Production methods As one of the oldest synthetically produced pigmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamp Black
Carbon black (with subtypes acetylene black, channel black, furnace black, lamp black and thermal black) is a material produced by the incomplete combustion of coal tar, vegetable matter, or petroleum products, including fuel oil, fluid catalytic cracking tar, and ethylene cracking in a limited supply of air. 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. Carbon black is used as a colorant and reinforcing filler in tires and other rubber products and as a pigment and wear protection additive in plastics, paints, and ink pigment. It is used in the EU as a food colorant when produced from vegetable matter (E153). The current International Agency for Research on Cancer (IARC) evaluation is that, "Carbon black is ... [...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. However, didymium glasses are superior for this purpose as it absorbs less light other than the Sodium D lines. Specialty tasting glasses made of cobalt glass are used by professional olive oil tasters to disguise the color of the oil being assessed to avoid bias in judging. 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 ty ... [...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 fragile 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, and fillers, especially in parts for automobiles, roofing, and in electronics. The mineral is used in cosmetics and food to add "shimmer" or "frost". Properties and structure The mica group comprises 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 translucent to opa ... [...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 com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Musk
Musk 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'' and Sanskrit मुष्क muṣka () derived from Proto-Indo-European noun ''múh₂s'' meaning "mouse". The deer gland was thought to resemble a scrotum. The term 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 structures and molecular shapes. Natural musk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambergris
Ambergris ( or ; ; ), ''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 last much longer, although it has been mostly replaced by synthetic ambroxide. It is sometimes used in cooking. Dogs are attracted to the smell of ambergris and are sometimes used by ambergris searchers. Etymology The English word ''amber'' derives from Middle Persian ʾmbl, traveling via Arabic (), Middle Latin ''ambar,'' and Middle French ''ambre'' to be adopted in Middle English in the 14th century. The word "ambergris" comes from the Old French ''ambre gris'' or "grey amber">-4; we might wonder whether there's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fruit Preserves
Fruit preserves are preparations of fruits whose main preserving agent is sugar and sometimes acid, often stored in glass jars and used as a condiment or spread. There are many varieties of fruit preserves globally, distinguished by the method of preparation, type of fruit used, and its place in a meal. Sweet fruit preserves such as jams, jellies, and marmalades are often eaten at breakfast with bread or as an ingredient of a pastry or dessert, whereas more savory and acidic preserves made from " vegetable fruits" such as tomato, squash or zucchini, are eaten alongside savory foods such as cheese, cold meats, and curries. Techniques There are several techniques of making jam, with or without added water. One factor depends on the natural pectin content of the ingredients. When making jam with low-pectin fruits like strawberries, high-pectin fruit like orange can be added, or additional pectin in the form of pectin powder, citric acid or citrus peels. Often the fruit will b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
