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Parchment is a thin material made from hide; often calfskin, sheepskin or goatskin, and often split. Its most common use was as a material for writing on, for documents, notes, or the pages of a book, codex or manuscript. It is distinct from leather in that parchment is limed but not tanned; therefore, it is very reactive to changes in relative humidity and is not waterproof. Finer-quality parchment is called vellum.
Parchment was developed in Pergamon, alternately Pergamo  from which name it is believed the word "parchment" evolved, under the patronage of either Eumenes I, who ruled 263–241 BCE; or Eumenes II, who ruled 197–158, as a substitute for papyrus, which was temporarily not being exported from Alexandria, its only source.
Herodotus mentions writing on skins as common in his time, the 5th century BCE; and in his Histories (v.58) he states that the Ionians of Asia Minor had been accustomed to give the name of skins (diphtherai) to books; this word was adapted by Hellenized Jews to describe scrolls. Parchment, however, derives its name from Pergamon, the city where it was perfected (via the Latin pergamenum and the French parchemin). In the 2nd century BCE a great library was set up in Pergamon that rivaled the famous Library of Alexandria. As prices rose for papyrus and the reed used for making it was over-harvested towards local extinction in the two nomes of the Nile delta that produced it, Pergamon adapted by increasing use of parchment.
Writing on prepared animal skins had a long history, however. David Diringer noted that "the first mention of Egyptian documents written on leather goes back to the Fourth Dynasty (c. 2550-2450 BCE), but the earliest of such documents extant are: a fragmentary roll of leather of the Sixth Dynasty (c. twenty-fourth century BCE), unrolled by Dr. H. Ibscher, and preserved in the Cairo Museum; a roll of the Twelfth Dynasty (c. 1990-1777 BCE) now in Berlin; the mathematical text now in the British Museum (MS. 10250); and a document of the reign of Ramses II (early thirtheenth century BCE).". Though the Assyrians and the Babylonians impressed their cuneiform on clay tablets, they also wrote on parchment from the 6th century BCE onward. Rabbinic literature traditionally maintains that the institution of employing parchment made of animal hides for the writing of ritual objects such as the Torah, mezuzah, and tefillin is Sinaitic in origin, with special designations for different types of parchment such as gevil and klaf. Early Islamic texts are also found on parchment.
One sort of parchment is vellum, a word that is used loosely to mean parchment, and especially to mean fine parchment, but more strictly refers to parchment made from calfskin (although goatskin can be as fine in quality). The words vellum and veal come from Latin vitulus, meaning calf, or its diminutive vitellus. In the Middle Ages, calfskin and split sheepskin were the most common materials for making parchment in England and France, while goatskin was more common in Italy. Other skins such as those from large animals such as horse and smaller animals such as squirrel and rabbit were also used. Whether uterine vellum (vellum made from aborted calf fetuses) was ever really used during the medieval period is still a matter of great controversy.
There was a short period during the introduction of printing where parchment and paper were used interchangeably: although most copies of the Gutenberg Bible are on paper, some were printed on parchment. In 1490, Johannes Trithemius preferred the older methods, because "handwriting placed on parchment will be able to endure a thousand years. But how long will printing last, which is dependent on paper? For if ...it lasts for two hundred years that is a long time."
In the later Middle Ages, parchment was largely replaced by paper. New techniques in paper milling allowed it to be much cheaper and more abundant than parchment. With the advent of printing in the later fifteenth century, the demands of printers far exceeded the supply of animal skins for parchment.
The heyday of parchment use was during the medieval period, but there has been a growing revival of its use among artists since the late 20th century. Although parchment never stopped being used (primarily for governmental documents and diplomas) it had ceased to be a primary choice for artist's supports by the end of 15th century Renaissance. This was partly due to its expense and partly due to its unusual working properties. Parchment consists mostly of collagen. When the water in paint media touches parchment's surface, the collagen melts slightly, forming a raised bed for the paint, a quality highly prized by some artists.
Parchment is also extremely affected by its environment and changes in humidity, which can cause buckling. Books with parchment pages were bound with strong wooden boards and clamped tightly shut by metal (often brass) clasps or leather straps; this acted to keep the pages pressed flat despite humidity changes. Such metal fittings continued to be found on books as decorative features even after the use of paper made them unnecessary.
Some contemporary artists prize the changeability of parchment, noting that the material seems alive and like an active participant in making artwork. To support the needs of the revival of use by artists, a revival in the art of making individual skins is also underway. Handmade skins are usually better prepared for artists and have fewer oily spots which can cause long-term cracking of paint than mass-produced parchment. Mass-produced parchment is usually made for lamp shades, furniture, or other interior design purposes.
The radiocarbon dating techniques that are used on papyrus can be applied to parchment as well. They do not date the age of the writing but the preparation of the parchment itself. However, radiocarbon dating can often be used on the inks that make up the writing, since many of them contain organic compounds such as plant leachings, soot, and wine.
"Parchment is prepared from pelt, i.e., wet, unhaired, and limed skin, simply by drying at ordinary temperatures under tension, most commonly on a wooden frame known as a stretching frame".
Flaying, soaking, and dehairing 
After being flayed, the skin is soaked in water for about 1 day. This removes blood and grime from the skin and prepares it for a dehairing liquor. The dehairing liquor was originally made of rotted, or fermented, vegetable matter, like beer or other liquors, but by the Middle Ages an unhairing bath included lime. Today, the lime solution is occasionally sharpened by the use of sodium sulfide. The liquor bath would have been in wooden or stone vats and the hides stirred with a long wooden pole to avoid human contact with the alkaline solution. Sometimes the skins would stay in the unhairing bath for 8 or more days depending how concentrated and how warm the solution was kept—unhairing could take up to twice as long in winter. The vat was stirred two or three times a day to ensure the solution's deep and uniform penetration. Replacing the lime water bath also sped the process up. However, if the skins were soaked in the liquor too long, they would be weakened and not able to stand the stretching required for parchment.
After soaking in water to make the skins workable, the skins were placed on a stretching frame. A simple frame with nails would work well in stretching the pelts. The skins could be attached by wrapping small, smooth rocks in the skins with rope or leather strips. Both sides would be left open to the air so they could be scraped with a sharp, semi-lunar knife to remove the last of the hair and get the skin to the right thickness. The skins, which were made almost entirely of collagen, would form a natural glue while drying and once taken off the frame they would keep their form. The stretching aligned the fibers to be more nearly parallel to the surface.
Parchment treatments 
To make the parchment more aesthetically pleasing or more suitable for the scribes, special treatments were used. According to Reed there were a variety of these treatments. Rubbing pumice powder into the flesh side of parchment while it was still wet on the frame was used to make it smooth and to modify the surface to enable inks to penetrate more deeply. Powders and pastes of calcium compounds were also used to help remove grease so the ink would not run. To make the parchment smooth and white, thin pastes (starchgrain or staunchgrain) of lime, flour, egg whites and milk were rubbed into the skins.
Meliora di Curci in her paper "The History and Technology of Parchment Making" notes that parchment was not always white. "Cennini, a 15th century craftsman provides recipes to tint parchment a variety of colours including purple, indigo, green, red and peach." The Early medieval Codex Argenteus and Codex Vercellensis, the Stockholm Codex Aureus and the Codex Brixianus give a range of luxuriously produced manuscripts all on purple vellum, in imitation of Byzantine examples, like the Rossano Gospels, Sinope Gospels and the Vienna Genesis, which at least at one time are believed to have been reserved for Imperial commissions.
Many techniques for parchment repair exist, to restore creased, torn, or incomplete parchments.
During the seventh through the ninth centuries, many earlier parchment manuscripts were scrubbed and scoured to be ready for rewriting, and often the earlier writing can still be read. These recycled parchments are called palimpsests. Later, more thorough techniques of scouring the surface irretrievably lost the earlier text.
Jewish parchment 
The way in which parchment was processed (from hide to parchment) has undergone a tremendous evolution based on time and location. Parchment and vellum are not the sole methods of preparing animal skins for writing. In the Babylonian Talmud (Bava Batra 14B) Moses writes the first Torah Scroll on the unsplit cow-hide called gevil.
Parchment is still the only medium used by traditional religious Jews for Torah scrolls or tefilin and mezuzahs, and is produced by large companies in Israel. For those uses, only hides of kosher animals are permitted. Since there are many requirements for it being fit for the religious use, the liming is usually processed under supervision of a qualified Rabbi.
Additional uses of the term 
In some universities, the word parchment is still used to refer to the certificate (scroll) presented at graduation ceremonies, even though the modern document is printed on paper or thin card; although doctoral graduands may be given the option of having their scroll written by a calligrapher on vellum. The University of Notre Dame still uses animal parchment for its diplomas. Similarly, University of Glasgow and Heriot-Watt University use goat skin parchment paper for their degrees.
Plant-based parchment 
Vegetable (paper) parchment is made by passing a waterleaf made of pulp fibers into sulfuric acid. The sulfuric acid hydrolyses and solubilises the main natural organic polymer, cellulose, present in the pulp wood fibers. The paper web is then washed in water, which stops the hydrolysis of the cellulose and causes a kind of cellulose coating to form on the waterleaf. The final paper is dried. This coating is a natural non-porous cement, that gives to the vegetable parchment paper its resistance to grease and its semi-translucency.
Other processes can be used to obtain grease-resistant paper, such as waxing the paper or using fluorine-based chemicals. Highly beating the fibers gives an even more translucent paper with the same grease resistance. Silicone and other coatings may also be applied to the parchment. A silicone-coating treatment produces a cross-linked material with high density, stability and heat resistance and low surface tension which imparts good anti-stick or release properties. Chromium salts can also be used to impart moderate anti-stick properties.
Parchment craft 
Historians believe that parchment craft originated as an art form in Europe during the 15th or 16th century. Parchment craft at that time occurred principally in Catholic communities, where crafts persons created lace-like items such as devotional pictures and communion cards. The craft developed over time, with new techniques and refinements being added. Until the 16th century, parchment craft was a European art form. However, missionaries and other settlers relocated to South America, taking parchment craft with them. As before, the craft appeared largely among the Catholic communities. Often, young girls receiving their First Communion received gifts of handmade parchment crafts.
Although the invention of the printing press led to a reduced interest in hand made cards and items, by the 18th century, people were regaining interest in detailed handwork. Parchment cards became larger in size and crafters began adding wavy borders and perforations. In the 19th century, influenced by French romanticism, parchment crafters began adding floral themes and cherubs and hand embossing.
Parchment craft today involves various techniques, including tracing a pattern with white or colored ink, embossing to create a raised effect, stippling, perforating, coloring and cutting. Parchment craft appears in hand made cards, as scrapbook embellishments, as bookmarks, lampshades, decorative small boxes, wall hangings and more.
See also 
- Brookes' Universal Gazetteer (1850) page 592.
- "parchment (writing material) -- Britannica Online Encyclopedia". britannica.com. 2012 [last update]. Retrieved 23 May 2012.
- David Diringer, The Book before Printing: Ancient, Medieval and Oriental, Dover Publications, New York 1982, p. 172.
- Maimonides, Hilkhoth Tefillin 1:3.
- as quoted in David McKitterick, Print, Manuscript, and the Search for Order Cambridge University Press, 2003
- "Clasps, Furniture, and Other Closures". Hand Bookindings. Princeton University Library. 2004. Retrieved 4 January 2012.
- For examples of current artists using parchment see: For example of current parchment makers see:
- Reed, Ronald Ancient Skins Parchments and Leathers published 1972 by Seminar Press Ltd. Berkeley Square London WIX 6BA
- Reed, 1975.
- See for example recipes in the Secretum Philosophorum
- Information Leaflet by Vaad Mishmereth Staam[dead link].
- Eisenlohr, Erika (1996), "Die Kunst, Pergament zu machen", in Lindgren, Uta, Europäische Technik im Mittelalter. 800 bis 1400. Tradition und Innovation (4th ed.), Berlin: Gebr. Mann Verlag, pp. 429–432, ISBN 3-7861-1748-9
- di Curci, Meliora. (2003) The History and Technology of Parchment Making.
- Hasewint, Inden W. (2001) Tor Parchment Prepared According to Mediaeval Recipes.
- Reed, Ronald. (1975). The Nature and Making of Parchment. Leeds, England: Elmete Press
- Roberts, Colin H.; Skeat, T. C. (1983), The Birth of the Codex, London: Oxford University Press, ISBN 0-19-726024-1
- Murray, Fiona, "Parchment Craft" in Australian Paper Crafts, No 23 2003, Pride Publishing, Rozelle NSW,pp 10–13
Further reading 
- Dougherty, Raymond P., 1928. "Writing upon parchment and papyrus among the Babylonians and the Assyrians", in Journal of the American Oriental Society 48, pp 109–135.
- Reed, Ronald. 1972. Ancient Skins, Parchments, and Leathers. Seminar Press. ISBN 0-12-903550-5
- Reed, Ronald. The Making and Nature of Parchment. Leeds: Elmete Press, 1975
- Hunter, Dard. Papermaking: the History and Technique of an Ancient Craft. New York: Dover Publications, 1978, c1947
- Ryder, Michael L., 1964. Parchment: its History, Manufacture and Composition. Journal of the Society of Archivists. URL: http://www.informaworld.com/openurl?genre=journal&issn=0037-9816 accessed Nov 20, 2008
- Outlines of industrial chemistry By Frank Hall Thorp, Warren Kendall Lewis
- The Natural History of the Raw Materials of Commerce By John Yeats
|Wikimedia Commons has media related to: Parchments|
|Wikisource has the text of the 1911 Encyclopædia Britannica article Parchment.|
- Pergamena Parchment
- Central European University, Materials and Techniques of Manuscript Production: Parchment: medieval technique
- On-line demonstration of the preparation of vellum from the BNF, Paris. Text in French, but mostly visual.
- Leaves of gold
- Meir Bar-Ilan, "Parchment"
- Lacus Curtius Website: Liber: Roman book production
- UNESCO: Parchment: production and conservation
- Inden written Hasewint Parchment Contemporary application of the Medieval technique.
- Pergamon Perchment Web Site (Perchment invented in Pergamon)
- Parchment - The Online Encyclopedia
- Materials and Techniques of Manuscript Production -Parchment
- Traditional Restoration Techniques: Parchment
- The History and Technology of Parchment Making - Lochac College of Scribes