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Preservation (library And Archival Science)
In library and archival science, preservation is a set of preventive conservation activities aimed at prolonging the life of a record, book, or object while making as few changes as possible. Preservation activities vary widely and may include monitoring the condition of items, maintaining the temperature and humidity in collection storage areas, writing a plan in case of emergencies, digitizing items, writing relevant metadata, and increasing accessibility. Preservation, in this definition, is practiced in a library or an archive by a librarian, archivist, or other professional when they perceive a record is in need of maintenance. Preservation should be distinguished from interventive conservation and restoration, which refers to the treatment and repair of individual items to slow the process of decay, or restore them to a usable state. Preventive conservation is occasionally used interchangeably with preservation, particularly outside the professional literature. Fundamenta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Disaster Recovery
Disaster recovery is the process of maintaining or reestablishing vital infrastructure and systems following a natural or human-induced disaster, such as a storm or battle.It employs policies, tools, and procedures. Disaster recovery focuses on the information technology (IT) or technology systems supporting critical business functions as opposed to business continuity. This involves keeping all essential aspects of a business functioning despite significant disruptive events; it can therefore be considered a subset of business continuity. Disaster recovery assumes that the primary site is not immediately recoverable and restores data and services to a secondary site. IT service continuity IT Service Continuity (ITSC) is a subset of business continuity planning (BCP) that focuses on Recovery Point Objective (RPO) and Recovery Time Objective (RTO). It encompasses IT disaster recovery planning and wider IT resilience planning. It also incorporates IT infrastructure and services ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paper Splitting
Paper splitting is a method of preserving brittle papers often found in library and archival materials. In this process the front and back of a sheet of paper are split apart. A piece of acid-free paper Acid-free paper is paper that, if infused in water, yields a neutral or basic pH (7 or slightly greater). It can be made from any cellulose fiber as long as the active acid pulp is eliminated during processing. It is also lignin- and sulfur-fre ... is placed between these two sides of an acidic sheet before the pages are reconnected. The intention is to reduce the acid deterioration in the paper. A paper-splitting machine has been developed, but is not in wide use. External links *Folger Shakespeare Library,Paper splitting and the Trevelyon manuscript *Library of Congress, Preservation (library and archival science) {{library-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mummy Paper
Mummy paper is paper that is claimed to be made from the linen wrappings and other fibers (e.g. papyrus) from Egyptian mummies imported to America circa 1855. The existence of this paper has not been conclusively confirmed, but it has been widely discussed. History The history of mummy paper in America is intimately connected with the history of both American papermaking and papermaking in general. Supply shortages Paper can be said to have been born in ancient Egypt, circa 3000 B.C., with the invention of what the Romans called “ papyrus”, based on an earlier Greek name for the material. Papyrus is not paper in the modern sense of the word, since it was formed from compressed sheets of reed stalks and not a pulp. Paper made from a pulped plant fiber can be credited to Ts’ai Lun of China in 105 A.D., when he first presented the Emperor a sheet of paper made from the inner bark of a mulberry tree. When the technique of papermaking found its way into Europe, paper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Tissue
Japanese tissue is a thin, strong paper made from vegetable fibers. Japanese tissue may be made from one of three plants, the ''kōzo'' plant (''Broussonetia papyrifera'', paper mulberry tree), the mitsumata (''Edgeworthia chrysantha'') shrub and the gampi tree (''Diplomorpha sikokiana''). The long, strong fibers of the kōzo plant produce very strong, dimensionally stable papers, and are the most commonly used fibers in the making of Japanese paper (washi). Tissue made from ''kōzo'', or ''kōzogami'' (楮紙), comes in varying thicknesses and colors, and is an ideal paper to use in the mending of books. The majority of mending tissues are made from ''kōzo'' fibers, though mitsumata and gampi papers also are used. Japanese tissue is also an ideal material for kites and airplanes models covering. Forms The kōzo plant is used in the manufacture of the following papers: The gampi plant is used in the manufacture of the following papers: The mitsumata plant is used in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acid-free Paper
Acid-free paper is paper that, if infused in water, yields a neutral or basic pH (7 or slightly greater). It can be made from any cellulose fiber as long as the active acid pulp is eliminated during processing. It is also lignin- and sulfur-free. Acid-free paper addresses the problem of preserving documents and preserving artwork for long periods. Overview Paper made from wood-based pulp that has not had its lignin removed turns yellow, becomes brittle, and deteriorates over time. When exposed to light and/or heat, the molecules in the acidic paper will break down even faster. Acidic wood-pulp paper became commonplace in the late 19th century, and in the 1930s William Barrow (a chemist and librarian) published a report about the deterioration of acidic paper in the libraries. For fear of the gradual disintegration of written materials, measures have since been taken to improve the quality of paper. During production, acid-free paper may be treated with a mild base (usuall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Realia (library Science)
In library classification systems, realia are three-dimensional objects from real life such as coins, tools and textiles, that do not fit into the traditional categories of library material. They can be either man-made (artifacts, tools, utensils, etc.) or naturally occurring (specimens, samples, etc.), usually borrowed, purchased, or received as donation by a teacher, library, or museum for use in classroom instruction or in exhibits. Archival and manuscript collections often receive items of memorabilia such as badges, emblems, insignias, jewelry, leather goods, needlework, etc., in connection with gifts of personal papers. Most government or institutional archives reject gifts of non-documentary objects unless they have a documentary value. When accepting large bequests of mixed objects they normally have the donors sign legal documents giving permission to the archive to destroy, exchange, sell or dispose in any way those objects which, according to the best judgement of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ephemera
Ephemera are transitory creations which are not meant to be retained or preserved. Its etymological origins extends to Ancient Greece, with the common definition of the word being: "the minor transient documents of everyday life". Ambiguous in nature, various interpretations of ephemera and related items have been contended, including menus, newspapers, postcards, posters, sheet music, stickers and valentines. Since the printing revolution, ephemera has been a long-standing element of everyday life. Some ephemera are ornate in their design, acquiring prestige, whereas others are minimal and notably utilitarian. Virtually all conceptions of ephemera make note of the matter's disposability. Ephemera has long been collected by the likes of families, hobbyists and curators, with certain instances of ephemera intended to be collected. Literature by collectors and societies has contributed to a greater willingness to preserve ephemera, which is now ubiquitous in archives and librar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leather
Leather is a strong, flexible and durable material obtained from the tanning, or chemical treatment, of animal skins and hides to prevent decay. The most common leathers come from cattle, sheep, goats, equine animals, buffalo, pigs and hogs, and aquatic animals such as seals and alligators. Leather can be used to make a variety of items, including clothing, footwear, handbags, furniture, tools and sports equipment, and lasts for decades. Leather making has been practiced for more than 7,000 years and the leading producers of leather today are China and India. Animal rights groups claim that modern commercial leather making and the consumption of its products is unethically killing animals. According to the life-cycle assessment (LCA) report for the United Nations Industrial Development Organization, 99% of the raw hides and skins used in the production of leather derive from animals raised for meat and/or dairy production. Critics of tanneries claim that they engage in u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sizing
Sizing or size is a substance that is applied to, or incorporated into, other materials—especially papers and textiles—to act as a protective filler or glaze. Sizing is used in papermaking and textile manufacturing to change the absorption and wear characteristics of those materials. Sizing is used for oil-based surface preparation for gilding (sometimes called ''mordant'' in this context). It is used by painters and artists to prepare paper and textile surfaces for some art techniques. Sizing is used in photography to increase the sharpness of a print, to change the glossiness of a print, or for other purposes depending on the type of paper and printing technique. Fibers used in composite materials are treated with various sizing agents to promote adhesion with the matrix material. Sizing is used during paper manufacture to reduce the paper's tendency when dry to absorb liquid, with the goal of allowing inks and paints to remain on the surface of the paper and to dry ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microform
Microforms are scaled-down reproductions of documents, typically either films or paper, made for the purposes of transmission, storage, reading, and printing. Microform images are commonly reduced to about 4% or of the original document size. For special purposes, greater optical reductions may be used. Three formats are common: microfilm (reels), microfiche (flat sheets), and aperture cards. Microcards, also known as "micro-opaques", a format no longer produced, were similar to microfiche, but printed on cardboard rather than photographic film. History Using the daguerreotype process, John Benjamin Dancer was one of the first to produce microphotographs, in 1839. He achieved a reduction ratio of 160:1. Dancer refined his reduction procedures with Frederick Scott Archer's wet collodion process, developed in 1850–51, but he dismissed his decades-long work on microphotographs as a personal hobby and did not document his procedures. The idea that microphotography could b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
