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Ammonia Fuming
Ammonia fuming is a wood finishing process that darkens wood and brings out the grain pattern. It consists of exposing the wood to fumes from a strong aqueous solution of ammonium hydroxide which reacts with the tannins in the wood. The process works best on white oak because of the high tannin content of this wood. Fumed oak is also called fumigated oak or smoked oak. Other species may also be fumed, but usually will not darken as much as white oak. In America, the introduction of the process is usually associated with the furniture maker Gustav Stickley at the beginning of the 20th century, but fuming was known in Europe before this. Process The wood to be fumed is placed in a sealed chamber with all the surfaces to be fumed exposed to freely circulating air. A large shallow container of ammonium hydroxide solution is placed on the floor of the chamber and the chamber is sealed. If the chamber is large or the fuming is to be done for a long time, more than one contain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clonfert Cathedral Choir Stalls South 2009 09 17
Clonfert () is a small village in east County Galway, Ireland, halfway between Ballinasloe and Portumna. The village gives its name to the Diocese of Clonfert. Clonfert Cathedral is one of the eight cathedral churches of the Church of Ireland, Diocese of Limerick and Killaloe. The cathedral of the Roman Catholic Diocese of Clonfert is located in Loughrea and is home to the Shrine of Our Lady of Clonfert. Three churches lay in this parish, St. Brendan's Eyrecourt, St. Francis Meelick and Clonfert. Its current parish priest (2021) is Fr. Declan McInerney and its bishop Michael Duignan. The village is in a civil parish In England, a civil parish is a type of administrative parish used for local government. It is a territorial designation which is the lowest tier of local government. Civil parishes can trace their origin to the ancient system of parishes, w ... of the same name. Notable people * Maeineann of Clonfert See also * List of towns and villages in Ireland Refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ammonia
Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the chemical formula, formula . A Binary compounds of hydrogen, stable binary hydride and the simplest pnictogen hydride, ammonia is a colourless gas with a distinctive pungent smell. It is widely used in fertilizers, refrigerants, explosives, cleaning agents, and is a precursor for numeous chemicals. Biologically, it is a common nitrogenous waste, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to fertilisers. Around 70% of ammonia produced industrially is used to make fertilisers in various forms and composition, such as urea and diammonium phosphate. Ammonia in pure form is also applied directly into the soil. Ammonia, either directly or indirectly, is also a building block for the synthesis of many chemicals. In many countries, it is classified as an List of extremely hazardous substances, extremely hazardous substance. Ammonia is toxic, cau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handicrafts
A handicraft is a traditional main sector of craft making and applies to a wide range of creative and design activities that are related to making things with one's hands and skill, including work with textiles, moldable and rigid materials, paper, plant fibers, clay, etc. One of the oldest handicraft is Dhokra; this is a sort of metal casting that has been used in India for over 5,000 years and is still used. In Sistan and Baluchestan Province, Iranian Baluchistan, women still make red ware hand-made pottery with dotted ornaments, much similar to the 4,000-year-old pottery tradition of Kalpurgan, an archaeological site near the village. Usually, the term is applied to traditional techniques of creating items (whether for personal use or as products) that are both practical and aesthetic. Handicraft industries are those that produce things with hands to meet the needs of the people in their locality without using machines. Collective terms for handicrafts include artisanry, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wood Finishing Techniques
Wood is a structural tissue/material found as xylem in the stems and roots of trees and other woody plants. It is an organic materiala natural composite of cellulosic fibers that are strong in tension and embedded in a matrix of lignin that resists compression. Wood is sometimes defined as only the secondary xylem in the stems of trees, or more broadly to include the same type of tissue elsewhere, such as in the roots of trees or shrubs. In a living tree, it performs a mechanical-support function, enabling woody plants to grow large or to stand up by themselves. It also conveys water and nutrients among the leaves, other growing tissues, and the roots. Wood may also refer to other plant materials with comparable properties, and to material engineered from wood, woodchips, or fibers. Wood has been used for thousands of years for fuel, as a construction material, for making tools and weapons, furniture and paper. More recently it emerged as a feedstock for the production of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ammonia
Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the chemical formula, formula . A Binary compounds of hydrogen, stable binary hydride and the simplest pnictogen hydride, ammonia is a colourless gas with a distinctive pungent smell. It is widely used in fertilizers, refrigerants, explosives, cleaning agents, and is a precursor for numeous chemicals. Biologically, it is a common nitrogenous waste, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to fertilisers. Around 70% of ammonia produced industrially is used to make fertilisers in various forms and composition, such as urea and diammonium phosphate. Ammonia in pure form is also applied directly into the soil. Ammonia, either directly or indirectly, is also a building block for the synthesis of many chemicals. In many countries, it is classified as an List of extremely hazardous substances, extremely hazardous substance. Ammonia is toxic, cau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fumed Oak
Ammonia fuming is a wood finishing process that darkens wood and brings out the grain pattern. It consists of exposing the wood to fumes from a strong aqueous solution of ammonium hydroxide which reacts with the tannins in the wood. The process works best on white oak because of the high tannin content of this wood. Fumed oak is also called fumigated oak or smoked oak. Other species may also be fumed, but usually will not darken as much as white oak. In America, the introduction of the process is usually associated with the furniture maker Gustav Stickley at the beginning of the 20th century, but fuming was known in Europe before this. Process The wood to be fumed is placed in a sealed chamber with all the surfaces to be fumed exposed to freely circulating air. A large shallow container of ammonium hydroxide solution is placed on the floor of the chamber and the chamber is sealed. If the chamber is large or the fuming is to be done for a long time, more than one contain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roycroft
Roycroft was a reformist community of craft workers and artists which formed part of the Arts and Crafts movement in the United States. Elbert Hubbard founded the community in 1895, in the village of East Aurora, New York, near Buffalo. Participants were known as Roycrofters. The work and philosophy of the group, often referred to as the Roycroft movement, had a strong influence on the development of American architecture and design in the early 20th century. History The name "Roycroft" was chosen after the printers, Samuel and Thomas Roycroft, who made books in London from about 1650–1690. The word ''roycroft'' had a special significance to Elbert Hubbard. Hubbard believed "''roycroft"'' meant "''king's craft"'' in French. In guilds of early modern Europe, king's craftsmen were guild members who had achieved a high degree of skill and therefore made things for the King. The Roycroft insignia was borrowed from the monk Cassiodorus, a 13th-century bookbinder and illuminator ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Limbert
Charles P. Limbert (1854–1923) was an American furniture designer. He is considered one of the most successful furniture leaders in the history of Grand Rapids and the Arts and Crafts movement in America. The furniture that bears his name is highly sought after and seriously collected to this day. His designs were mainly inspired by such diverse influences as English Arts and Crafts, Dutch folk furniture, Scottish architect/designer Charles Rennie Mackintosh, and the Vienna Secession. Early Days Limbert was born in Linesville, Pennsylvania, in 1854, the son of cabinetmaker and furniture dealer Levi H. Limbert. After moving with his family in 1866 to Akron, Ohio, he later learned the furniture business in the 1870s at his father's store. As a young man in Akron, the first business he tried on his own was in the carriage trade. Career After leaving Akron, Limbert moved to Chicago (where he worked as a salesman at Colbys Furniture Store), then to Grand Rapids, Michigan, where he s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Personal Protective Equipment
Personal protective equipment (PPE) is protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injury or infection. The hazards addressed by protective equipment include physical, electrical, heat, chemical, biohazards, and airborne particulate matter. Protective equipment may be worn for job-related occupational safety and health purposes, as well as for sports and other recreational activities. ''Protective clothing'' is applied to traditional categories of clothing, and ''protective gear'' applies to items such as pads, guards, shields, or masks, and others. PPE suits can be similar in appearance to a cleanroom suit. The purpose of personal protective equipment is to reduce employee exposure to hazards when engineering controls and administrative controls are not feasible or effective to reduce these risks to acceptable levels. PPE is needed when there are hazards present. PPE has the serious limitation that it d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arts And Crafts Movement
The Arts and Crafts movement was an international trend in the decorative and fine arts that developed earliest and most fully in the British Isles and subsequently spread across the British Empire and to the rest of Europe and America. Initiated in reaction against the perceived impoverishment of the decorative arts and the conditions in which they were produced, the movement flourished in Europe and North America between about 1880 and 1920. Some consider that it is the root of the Modern Style, a British expression of what later came to be called the Art Nouveau movement. Others consider that it is the incarnation of Art Nouveau in England. Others consider Art and Crafts to be in opposition to Art Nouveau. Arts and Crafts indeed criticized Art Nouveau for its use of industrial materials such as iron. In Japan, it emerged in the 1920s as the Mingei movement. It stood for traditional craftsmanship, and often used medieval, romantic, or folk styles of decoration. It advoca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tannic Acid
Tannic acid is a specific form of tannin, a type of polyphenol. Its weak acidity (Acid dissociation constant, pKa around 6) is due to the numerous phenol groups in the structure. The chemical formula for commercial tannic acid is often given as C76H52O46, which corresponds with decagalloyl glucose, but in fact it is a mixture of polygalloyl glucoses or polygalloyl quinic acid esters with the number of gallic acid, galloyl moieties per molecule ranging from 2 up to 12 depending on the plant source used to extract the tannic acid. Commercial tannic acid is usually extracted from any of the following plant parts: Tara pods (''Caesalpinia spinosa''), gallnuts from ''Rhus semialata'' or ''Quercus infectoria'' or Sicilian sumac leaves (''Rhus coriaria''). According to the definitions provided in external references such as international pharmacopoeia, Food Chemicals Codex and FAO-WHO tannic acid monograph only tannins obtained from the above-mentioned plants can be considered as tanni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
