1.
High Middle Ages
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The High Middle Ages or High Medieval Period was the period of European history around the 11th, 12th, and 13th centuries. The High Middle Ages were preceded by the Early Middle Ages and followed by the Late Middle Ages, by 1250 the robust population increase greatly benefited the European economy, reaching levels that would not be seen again in some areas until the 19th century. This trend was checked in the Late Middle Ages by a series of calamities, notably the Black Death but also including numerous wars, from about the year 780 onwards, Europe saw the last of the barbarian invasions and became more socially and politically organized. The Carolingian Renaissance led to scientific and philosophical revival of Europe, the first universities were established in Bologna, Paris, Oxford and Modena. The Vikings had settled in the British Isles, France and elsewhere, the Magyars had ceased their expansion in the 10th century, and by the year 1000, a Christian Kingdom of Hungary was recognized in Central Europe, forming alliances with regional powers. With the brief exception of the Mongol invasions in the 13th century, in the 11th century, populations north of the Alps began to settle new lands, some of which had reverted to wilderness after the end of the Roman Empire. In what is known as the clearances, vast forests. At the same time settlements moved beyond the boundaries of the Frankish Empire to new frontiers in Europe, beyond the Elbe River. The High Middle Ages produced many different forms of intellectual, spiritual, the rediscovery of the works of Aristotle led Thomas Aquinas and other thinkers of the period to develop Scholasticism, a combination of Catholicism and ancient philosophy. For much of the time period Constantinople remained Europes most populous city, in architecture, many of the most notable Gothic cathedrals were built or completed during this era. The Crisis of the Late Middle Ages, beginning at the start of the 14th century, in England, the Norman Conquest of 1066 resulted in a kingdom ruled by a Francophone nobility. The Normans invaded Ireland by force in 1169 and soon established throughout most of the country. Likewise, Scotland and Wales were subdued to vassalage at about the same time, the Exchequer was founded in the 12th century under King Henry I, and the first parliaments were convened. In 1215, after the loss of Normandy, King John signed the Magna Carta into law, from the mid-tenth to the mid-11th centuries, the Scandinavian kingdoms were unified and Christianized, resulting in an end of Viking raids, and greater involvement in European politics. King Cnut of Denmark ruled over both England and Norway, after Cnuts death in 1035, England and Norway were lost, and with the defeat of Valdemar II in 1227, Danish predominance in the region came to an end. Meanwhile, Norway extended its Atlantic possessions, ranging from Greenland to the Isle of Man, while Sweden, under Birger Jarl, however, the Norwegian influence started to decline already in the same period, marked by the Treaty of Perth of 1266. Also, civil wars raged in Norway between 1130 and 1240, by the time of the High Middle Ages, the Carolingian Empire had been divided and replaced by separate successor kingdoms called France and Germany, although not with their modern boundaries. Germany was under the banner of the Holy Roman Empire, which reached its mark of unity
2.
Johannes Gutenberg
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Johannes Gensfleisch zur Laden zum Gutenberg was a German blacksmith, goldsmith, printer, and publisher who introduced printing to Europe. Gutenberg in 1439 was the first European to use the printing press and his truly epochal invention was the combination of these elements into a practical system that allowed the mass production of printed books and was economically viable for printers and readers alike. Gutenbergs method for making type is considered to have included a type metal alloy. The alloy was a mixture of lead, tin, and antimony that melted at a low temperature for faster and more economical casting, cast well. In Renaissance Europe, the arrival of mechanical movable type printing introduced the era of communication which permanently altered the structure of society. Gutenbergs printing technology spread rapidly throughout Europe and later the world and his major work, the Gutenberg Bible, has been acclaimed for its high aesthetic and technical quality. Gutenberg was born in the German city of Mainz, the youngest son of the upper-class merchant Friele Gensfleisch zur Laden, and his wife, Else Wyrich. It is assumed that he was baptized in the close to his birthplace of St. Christoph. According to some accounts, Friele was a goldsmith for the bishop at Mainz, Gutenbergs year of birth is not precisely known but was most likely around 1398. John Lienhard, technology historian, says Most of Gutenbergs early life is a mystery and his father worked with the ecclesiastic mint. Gutenberg grew up knowing the trade of goldsmithing and this is supported by historian Heinrich Wallau, who adds, In the 14th and 15th centuries his claimed a hereditary position as. Retainers of the household of the master of the archiepiscopal mint, in this capacity they doubtless acquired considerable knowledge and technical skill in metal working. They supplied the mint with the metal to be coined, changed the species of coins. Wallau adds, His surname was derived from the inhabited by his father and his paternal ancestors zu Laden. The house of Gänsfleisch was one of the families of the town. Patricians in Mainz were often named after houses they owned, around 1427, the name zu Gutenberg, after the family house in Mainz, is documented to have been used for the first time. In 1411, there was an uprising in Mainz against the patricians, as a result, the Gutenbergs are thought to have moved to Eltville am Rhein, where his mother had an inherited estate. According to historian Heinrich Wallau, All that is known of his youth is that he was not in Mainz in 1430 and it is presumed that he migrated for political reasons to Strasbourg, where the family probably had connections
3.
Order of Saint Benedict
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Each community within the order maintains its own autonomy, while the order itself represents their mutual interests. Internationally, the order is governed by the Benedictine Confederation, a body, established in 1883 by Pope Leo XIIIs Brief Summum semper, individuals whose communities are members of the order generally add the initials OSB after their names. The monastery at Subiaco in Italy, established by Saint Benedict of Nursia circa 529, was the first of the monasteries he founded. He later founded the Abbey of Monte Cassino, there is no evidence, however, that he intended to found an order and the Rule of Saint Benedict presupposes the autonomy of each community. It was from the monastery of St. Andrew in Rome that Augustine, the prior, at various stopping places during the journey, the monks left behind them traditions concerning their rule and form of life, and probably also some copies of the Rule. Lérins Abbey, for instance, founded by Honoratus in 375, probably received its first knowledge of the Benedictine Rule from the visit of St. Augustine, in Gaul and Switzerland, it supplemented the much stricter Irish or Celtic Rule introduced by Columbanus and others. In many monasteries it eventually displaced the earlier codes. Largely through the work of Benedict of Aniane, it became the rule of choice for monasteries throughout the Carolingian empire, Monastic scriptoria flourished from the ninth through the twelfth centuries. Sacred Scripture was always at the heart of every monastic scriptorium, as a general rule those of the monks who possessed skill as writers made this their chief, if not their sole active work. In the Middle Ages monasteries were founded by the nobility. Cluny Abbey was founded by William I, Duke of Aquitaine in 910, the abbey was noted for its strict adherence to the Rule of St. Benedict. The abbot of Cluny was the superior of all the daughter houses, one of the earliest reforms of Benedictine practice was that initiated in 980 by Romuald, who founded the Camaldolese community. The English Benedictine Congregation is the oldest of the nineteen Benedictine congregations, Augustine of Canterbury and his monks established the first English Benedictine monastery at Canterbury soon after their arrival in 597. Many of the sees of England were founded and governed by the Benedictines. Monasteries served as hospitals and places of refuge for the weak, the monks studied the healing properties of plants and minerals to alleviate the sufferings of the sick. Germany was evangelized by English Benedictines, willibrord and Boniface preached there in the seventh and eighth centuries and founded several abbeys. In the English Reformation, all monasteries were dissolved and their lands confiscated by the Crown, during the 19th century they were able to return to England, including to Selby Abbey in Yorkshire, one of the few great monastic churches to survive the Dissolution. St. Mildreds Priory, on the Isle of Thanet, Kent, was built in 1027 on the site of an abbey founded in 670 by the daughter of the first Christian King of Kent, currently the priory is home to a community of Benedictine nuns
4.
Regensburg
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Regensburg is a city in south-east Germany, situated at the confluence of the Danube, Naab and Regen rivers. With over 140,000 inhabitants, Regensburg is the fourth-largest city in the State of Bavaria after Munich, the city is the political, economic and cultural centre of Eastern Bavaria and the capital of the Bavarian administrative region Upper Palatinate. The medieval centre of the city is a UNESCO World Heritage Site, in 2014, Regensburg was among the top sights and travel attractions in Germany. Generally known in English as Ratisbon until well into the twentieth century, the first settlements in Regensburg date from the Stone Age. The Celtic name Radasbona was the oldest given to a settlement near the present city, around AD90, the Romans built a fort there. In 179, a new Roman fort Castra Regina was built for Legio III Italica during the reign of Emperor Marcus Aurelius. It is believed that as early as in late Roman times the city was the seat of a bishop, from the early 6th century, Regensburg was the seat of a ruling family known as the Agilolfings. From about 530 to the first half of the 13th century, Regensburg remained an important city during the reign of Charlemagne. After the partition of the Carolingian Empire in 843, the city became the seat of the Eastern Frankish ruler, two years later, fourteen Bohemian princes came to Regensburg to receive baptism there. This was the point of Christianization of the Czechs. These events had a impact on the cultural history of the Czech lands, as they were consequently part of the Roman Catholic. A memorial plate at St Johns Church was unveiled a few years ago, commemorating the incident in the Czech, on 8 December 899 Arnulf of Carinthia, descendant of Charlemagne, died at Regensburg, Bavaria, Germany. In 800 AD the city had 23,000 inhabitants and by 1000 AD this had almost doubled to 40,000 people. In 1096, on the way to the First Crusade, Peter the Hermit led a mob of Crusaders that attempted to force the conversion of the Jews of Regensburg. Between 1135 and 1146, the Stone Bridge across the Danube was built at Regensburg and this bridge opened major international trade routes between northern Europe and Venice, and this began Regensburgs golden age as a residence of wealthy trading families. Regensburg became the centre of southern Germany and was celebrated for its gold work. In 1245 Regensburg became a Free Imperial City and was a centre before the shifting of trade routes in the late Middle Ages. At the end of the 15th century in 1486, Regensburg became part of the Duchy of Bavaria, the city adopted the Protestant Reformation in 1542 and its Town Council remained entirely Lutheran
5.
Germany
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Germany, officially the Federal Republic of Germany, is a federal parliamentary republic in central-western Europe. It includes 16 constituent states, covers an area of 357,021 square kilometres, with about 82 million inhabitants, Germany is the most populous member state of the European Union. After the United States, it is the second most popular destination in the world. Germanys capital and largest metropolis is Berlin, while its largest conurbation is the Ruhr, other major cities include Hamburg, Munich, Cologne, Frankfurt, Stuttgart, Düsseldorf and Leipzig. Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity, a region named Germania was documented before 100 AD. During the Migration Period the Germanic tribes expanded southward, beginning in the 10th century, German territories formed a central part of the Holy Roman Empire. During the 16th century, northern German regions became the centre of the Protestant Reformation, in 1871, Germany became a nation state when most of the German states unified into the Prussian-dominated German Empire. After World War I and the German Revolution of 1918–1919, the Empire was replaced by the parliamentary Weimar Republic, the establishment of the national socialist dictatorship in 1933 led to World War II and the Holocaust. After a period of Allied occupation, two German states were founded, the Federal Republic of Germany and the German Democratic Republic, in 1990, the country was reunified. In the 21st century, Germany is a power and has the worlds fourth-largest economy by nominal GDP. As a global leader in industrial and technological sectors, it is both the worlds third-largest exporter and importer of goods. Germany is a country with a very high standard of living sustained by a skilled. It upholds a social security and universal health system, environmental protection. Germany was a member of the European Economic Community in 1957. It is part of the Schengen Area, and became a co-founder of the Eurozone in 1999, Germany is a member of the United Nations, NATO, the G8, the G20, and the OECD. The national military expenditure is the 9th highest in the world, the English word Germany derives from the Latin Germania, which came into use after Julius Caesar adopted it for the peoples east of the Rhine. This in turn descends from Proto-Germanic *þiudiskaz popular, derived from *þeudō, descended from Proto-Indo-European *tewtéh₂- people, the discovery of the Mauer 1 mandible shows that ancient humans were present in Germany at least 600,000 years ago. The oldest complete hunting weapons found anywhere in the world were discovered in a mine in Schöningen where three 380, 000-year-old wooden javelins were unearthed
6.
Saint George
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Saint George, according to legend, was a Roman soldier of Syrian origin and officer in the Guard of Roman emperor Diocletian, who ordered his death for failing to recant his Christian faith. As a Christian martyr, he became one of the most venerated saints in Christianity. In hagiography, as one of the Fourteen Holy Helpers and one of the most prominent military saints, he is immortalised in the myth of Saint George and his memorial, Saint Georges Day, is traditionally celebrated on April 23. Numerous countries, cities, professions and organisations claim Saint George as their patron, accounts differ regarding whether George was born in Cappadocia or Syria Palaestina, but agree that he was raised at least partly in Lydda. There is little information on the life of Saint George. Two stories tell of his possible origins, one says that he was born in the region of Cappadocia, which is now located in central Turkey. Georges parents were both Christian, and they brought him up to be a Christian and his father died when he was fourteen, and his mother took George back to her homeland of Palestine. At seventeen, he joined the Roman army, a second story says that Georges father came from Cappadocia. His mother was from Lydda, in Palestine, and George was born in Lydda, both of his parents were from noble Syrian families and gave him the Greek name of Georgios. Georges father had been an officer in the Roman army, so George joined the Roman army as soon as he could, an earlier work by Eusebius, Church history, written in the 4th century, contributed to the legend but did not name George or provide significant detail. A critical edition of a Syriac Acta of Saint George, accompanied by an annotated English translation, was published by E. W. Brooks in 1925. Pope Gelasius I stated that George was among those whose names are justly reverenced among men. The traditional legends have offered a narration of Georges encounter with a dragon. The modern legend that follows below is synthesised from early and late hagiographical sources, chief among the legendary sources about the saint is the Golden Legend, which remains the most familiar version in English owing to William Caxtons 15th-century translation. At the age of 14, George lost his father, a few years later, George then decided to go to Nicomedia and present himself to Diocletian to apply for a career as a soldier. Diocletian welcomed him with arms, as he had known his father. By his late twenties, George was promoted to the rank of military tribune, however, George objected, and with the courage of his faith, approached the Emperor and ruler. Diocletian was upset, not wanting to lose his best tribune, but George loudly renounced the Emperors edict, and in front of his fellow soldiers and tribunes he claimed himself to be a Christian
7.
Clay
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Clay is a fine-grained natural rock or soil material that combines one or more clay minerals with traces of metal oxides and organic matter. Geologic clay deposits are composed of phyllosilicate minerals containing variable amounts of water trapped in the mineral structure. Clays are plastic due to water content and become hard, brittle. Depending on the content in which it is found, clay can appear in various colours from white to dull grey or brown to deep orange-red. Although many naturally occurring deposits include both silts and clay, clays are distinguished from other fine-grained soils by differences in size, silts, which are fine-grained soils that do not include clay minerals, tend to have larger particle sizes than clays. There is, however, some overlap in size and other physical properties. The distinction between silt and clay varies by discipline, geologists and soil scientists usually consider the separation to occur at a particle size of 2 µm, sedimentologists often use 4–5 μm, and colloid chemists use 1 μm. Geotechnical engineers distinguish between silts and clays based on the plasticity properties of the soil, as measured by the soils Atterberg limits, ISO14688 grades clay particles as being smaller than 2 μm and silt particles as being larger. These solvents, usually acidic, migrate through the rock after leaching through upper weathered layers. In addition to the process, some clay minerals are formed through hydrothermal activity. There are two types of deposits, primary and secondary. Primary clays form as residual deposits in soil and remain at the site of formation, secondary clays are clays that have been transported from their original location by water erosion and deposited in a new sedimentary deposit. Clay deposits are associated with very low energy depositional environments such as large lakes. Depending on the source, there are three or four main groups of clays, kaolinite, montmorillonite-smectite, illite, and chlorite. Chlorites are not always considered to be a clay, sometimes being classified as a group within the phyllosilicates. There are approximately 30 different types of clays in these categories. Varve is clay with visible annual layers, which are formed by deposition of those layers and are marked by differences in erosion. This type of deposit is common in glacial lakes
8.
Epigraphy
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Specifically excluded from epigraphy are the historical significance of an epigraph as a document and the artistic value of a literary composition. A person using the methods of epigraphy is called an epigrapher or epigraphist, for example, the Behistun inscription is an official document of the Achaemenid Empire engraved on native rock at a location in Iran. Epigraphists are responsible for reconstructing, translating, and dating the trilingual inscription and it is the work of historians, however, to determine and interpret the events recorded by the inscription as document. Often, epigraphy and history are competences practiced by the same person, an epigraph is any sort of text, from a single grapheme to a lengthy document. Epigraphy overlaps other competences such as numismatics or palaeography, when compared to books, most inscriptions are short. Typically the material is durable, but the durability might be an accident of circumstance, epigraphy is a primary tool of archaeology when dealing with literate cultures. The US Library of Congress classifies epigraphy as one of the sciences of history. Epigraphy also helps identify a forgery, epigraphic evidence formed part of the discussion concerning the James Ossuary, the study of ancient handwriting, usually in ink, is a separate field, palaeography. The character of the writing, the subject of epigraphy, is a quite separate from the nature of the text. Texts inscribed in stone are usually for public view and so they are different from the written texts of each culture. Not all inscribed texts are public, however, in Mycenaean Greece the deciphered texts of Linear B were revealed to be used for economic. Informal inscribed texts are graffiti in its original sense, the science of epigraphy has been developing steadily since the 16th century. Principles of epigraphy vary culture by culture, and the infant science in European hands concentrated on Latin inscriptions at first, individual contributions have been made by epigraphers such as Georg Fabricius, August Wilhelm Zumpt, Theodor Mommsen, Emil Hübner, Franz Cumont, Louis Robert. The Corpus Inscriptionum Latinarum, begun by Mommsen and other scholars, has published in Berlin since 1863. It is the largest and most extensive collection of Latin inscriptions, New fascicles are still produced as the recovery of inscriptions continues. The Corpus is arranged geographically, all inscriptions from Rome are contained in volume 6 and this volume has the greatest number of inscriptions, volume 6, part 8, fascicle 3 was just recently published. Specialists depend on such on-going series of volumes in which newly discovered inscriptions are published, often in Latin, Greek epigraphy has unfolded in the hands of a different team, with different corpora. The first is Corpus Inscriptionum Graecarum of which four volumes came out, again at Berlin and this marked a first attempt at a comprehensive publication of Greek inscriptions copied from all over the Greek-speaking world
9.
Phaistos Disc
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The Phaistos Disc is a disk of fired clay from the Minoan palace of Phaistos on the island of Crete, possibly dating to the middle or late Minoan Bronze Age. Now, the island of Crete is part of modern Greece, the disk is about 15 cm in diameter and covered on both sides with a spiral of stamped symbols. Its purpose and meaning, and even its original place of manufacture, remain disputed. This unique object is now on display at the museum of Heraklion. The Phaistos Disc captured the imagination of amateur and professional archaeologists, while it is not clear that it is a script, most attempted decipherments assume that it is, most additionally assume a syllabary, others an alphabet or logography. Although the Phaistos Disc is generally accepted as authentic by archaeologists and this grouping of four rooms also served as a formal entry into the palace complex. It was found in the cell of an underground temple depository. These basement cells, only accessible from above, were covered with a layer of fine plaster. Their content was poor in artifacts, but rich in black earth and ashes. In the northern part of the cell, in the same black layer. The Phaistos Disc is generally accepted as authentic by archaeologists, the assumption of authenticity is based on the excavation records by Luigi Pernier. This assumption is supported by the discovery of the Arkalochori Axe with similar. The possibility that the disc is a 1908 forgery or hoax has been raised by two scholars, according to a report in The Times the date of manufacture has never been established by thermoluminescence. In his 2008 review, Robinson does not endorse the forgery arguments and it will either confirm that new finds are worth hunting for, or it will stop scholars from wasting their effort. A gold signet ring from Knossos, found in 1926, contains a Linear A inscription developed in a field defined by a spiral—similar to the Phaistos Disc, a sealing found in 1955 shows the only known parallel to sign 21 of the Phaistos disc. This is considered as evidence that the Phaistos Disc is a genuine Minoan artifact. Yves Duhoux dates the disc to between 1850 B. C. and 1600 B. C. on the basis of Luigi Perniers report, jeppesen dates it to after 1400. Doubting the viability of Perniers report, Louis Godart resigns himself to admitting that archaeologically, best suggests a date in the first half of the fourteenth century B. C. based on his dating of tablet PH1
10.
Movable type
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Movable type is the system and technology of printing and typography that uses movable components to reproduce the elements of a document usually on the medium of paper. In 1377, currently the oldest extant movable metal print book, the diffusion of both movable-type systems was, however, limited. Around 1450 Johannes Gutenberg made another version of a metal printing press in Europe, along with innovations in casting the type based on a matrix. The more limited number of characters needed for European languages was an important factor, Gutenberg was the first to create his type pieces from an alloy of lead, tin, and antimony—and these materials remained standard for 550 years. For alphabetic scripts, movable-type page setting was quicker than woodblock printing, the metal type pieces were more durable and the lettering was more uniform, leading to typography and fonts. The high quality and relatively low price of the Gutenberg Bible established the superiority of movable type in Europe, the printing press may be regarded as one of the key factors fostering the Renaissance and due to its effectiveness, its use spread around the globe. The 19th-century invention of hot metal typesetting and its successors caused movable type to decline in the 20th century, the technique of imprinting multiple copies of symbols or glyphs with a master type punch made of hard metal first developed around 3000 BC in ancient Sumer. These metal punch types can be seen as precursors of the letter punches adapted in later millennia to printing with metal type. Cylinder seals were used in Mesopotamia to create an impression on a surface by rolling the seal on wet clay and they were used to sign documents and mark objects as the owners property. By 650 BC the ancient Greeks were using larger diameter punches to imprint small page images onto coins and tokens, seals and stamps may have been precursors to movable type. A few authors even view the disc as technically meeting all definitional criteria to represent an early incidence of movable-type printing, recently it has been alleged by Jerome Eisenberg that the disk is a forgery. The Prüfening dedicatory inscription is medieval example of movable type stamps being used, yet copying books by hand was still labour-consuming. Not until the Xiping Era, towards the end of the Eastern Han Dynasty did sealing print and it was soon used for printing designs on fabrics, and later for printing texts. Woodblock printing, invented by about the 8th century during the Tang Dynasty, then carvers cut away the parts of the board that were not part of the character, so that the characters were cut in relief, completely differently from those cut intaglio. When printing, the characters would have some ink spread on them. With workers’ hands moving on the back of paper gently, characters would be printed on the paper, by the Song Dynasty, woodblock printing came to its heyday. Although woodblock printing played a role in spreading culture, there remained some apparent drawbacks. Firstly, carving the printing plate required considerable time, labour and materials, secondly, it was not convenient to store these plates, with woodblock printing, one printing plate could be used for tens of hundreds of books, playing a magnificent role in spreading culture
11.
Paper
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Paper is a thin material produced by pressing together moist fibres of cellulose pulp derived from wood, rags or grasses, and drying them into flexible sheets. It is a material with many uses, including writing, printing, packaging, cleaning. The modern pulp and paper industry is global, with China leading its production, the oldest known archaeological fragments of the immediate precursor to modern paper, date to the 2nd century BC in China. The pulp papermaking process is ascribed to Cai Lun, a 2nd-century AD Han court eunuch, with paper as an effective substitute for silk in many applications, China could export silk in greater quantity, contributing to a Golden Age. Because of papers introduction to the West through the city of Baghdad, in the 19th century, industrial manufacture greatly lowered its cost, enabling mass exchange of information and contributing to significant cultural shifts. In 1844, the Canadian inventor Charles Fenerty and the German F. G. Keller independently developed processes for pulping wood fibres, before the industrialisation of the paper production the most common fibre source was recycled fibres from used textiles, called rags. The rags were from hemp, linen and cotton, a process for removing printing inks from recycled paper was invented by German jurist Justus Claproth in 1774. Today this method is called deinking and it was not until the introduction of wood pulp in 1843 that paper production was not dependent on recycled materials from ragpickers. The word paper is etymologically derived from Latin papyrus, which comes from the Greek πάπυρος, although the word paper is etymologically derived from papyrus, the two are produced very differently and the development of the first is distinct from the development of the second. Papyrus is a lamination of natural plant fibres, while paper is manufactured from fibres whose properties have changed by maceration. To make pulp from wood, a chemical pulping process separates lignin from cellulose fibres and this is accomplished by dissolving lignin in a cooking liquor, so that it may be washed from the cellulose, this preserves the length of the cellulose fibres. Paper made from chemical pulps are also known as wood-free papers–not to be confused with paper, this is because they do not contain lignin. The pulp can also be bleached to produce paper, but this consumes 5% of the fibres, chemical pulping processes are not used to make paper made from cotton. There are three main chemical pulping processes, the process dates back to the 1840s and it was the dominant method extent before the second world war. Most pulping operations using the process are net contributors to the electricity grid or use the electricity to run an adjacent paper mill. Another advantage is that this process recovers and reuses all inorganic chemical reagents, soda pulping is another specialty process used to pulp straws, bagasse and hardwoods with high silicate content. There are two major mechanical pulps, thermomechanical pulp and groundwood pulp, in the TMP process, wood is chipped and then fed into steam heated refiners, where the chips are squeezed and converted to fibres between two steel discs. In the groundwood process, debarked logs are fed into grinders where they are pressed against rotating stones to be made into fibres
12.
Punch (tool)
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A punch is a hard metal rod with a shaped tip at one end and a blunt butt end at the other, which is usually struck by a hammer. Typically, woodworkers use a hammer to strike a punch. Punches are used to drive objects, such as nails, or to form an impression of the tip on a workpiece, decorative punches may also be used to create a pattern or even form an image. Metal pins are removed from a using a PIN PUNCH. First use a punch to loosen metal pin then use a pin punch to finish removing the pin from hole. A center punch is used to mark the center of a point and it is usually used to mark the center of a hole when drilling holes. A drill has the tendency to wander if it does not start in a recess, a center punch forms a large enough dimple to guide the tip of the drill. The tip of a center punch has an angle between 60 and 90 degrees, when drilling larger holes, and the web of the drill is wider than the indentation produced by a center punch, the drilling of a pilot hole is usually needed. An automatic center punch operates without the need for a hammer, a prick punch is similar to a center punch but used for marking out. It has an angled tip to produce a narrower and deeper point. It is also known as a dot punch, the mark can then be enlarged with a center punch for drilling. The tip of a punch is 40 degrees A transfer punch is a punch of a specific outer diameter that is non-tapered. It is used to fit the tolerances of an existing hole and. It can be used, for example, to duplicate the hole patterns in a part, a drift punch is misleadingly named, it is not used as a punch in the traditional sense of the term. A drift punch, or drift pin, or lineup punch, is used as an aid in aligning bolt or rivet holes prior to inserting a fastener, a drift punch is constructed as a tapered rod, with the hammer acting on the large end of the taper. The tapered end of a punch is placed into the semi-aligned bolt holes of two separate components, and then driven into the hole. As it is driven in, the forces the two components into alignment, allowing for easy insertion of the fastener. Unlike most punches, force is never applied to the tip, spring punches, also called roll pin punches, are used to drive roll pins
