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A fountain pen is a writing instrument that uses a metal nib to apply water-based ink to paper. It is distinguished from earlier by using an internal reservoir to hold ink, eliminating the need to repeatedly dip the pen in an inkwell during use. The pen draws ink from the reservoir through a feed to the nib and deposits the ink on paper via a combination of gravity and capillary action. Filling the reservoir with ink may be achieved manually, via the use of an eyedropper or syringe, or via an internal filling mechanism that creates suction (for example, through a piston mechanism) or a vacuum to transfer ink directly through the nib into the reservoir. Some pens employ removable reservoirs in the form of pre-filled ink cartridges.
There is compelling evidence that a working fountain pen was constructed and used during the Renaissance by artist and inventor Leonardo da Vinci. Leonardo's journals contain drawings with cross-sections of what appears to be a reservoir pen that works by both gravity and capillary action. Historians also took note of the fact that the handwriting in the inventor's surviving journals is of a consistent contrast throughout, rather than exhibiting the characteristic fading pattern typical of a quill pen caused by expending and re-dipping. While no physical item survives, several working models were reconstructed in 2011 by artist Amerigo Bombara that have since been put on display in museums dedicated to Leonardo.
The first fountain pens making use of all these key ingredients appeared in the 1850s. In the 1870s Duncan MacKinnon, a Canadian living in New York City, and Alonzo T. Cross of Providence, Rhode Island, created stylographic pens with a hollow, tubular nib and a wire acting as a valve. Stylographic pens are now used mostly for drafting and technical drawing but were very popular in the decade beginning in 1875. In the 1880s the era of the mass production fountain pen finally began. The dominant American producers in this pioneer era were Waterman pens, of New York City, and Wirt, based in Bloomsburg, Pennsylvania. Waterman soon outstripped Wirt, along with many companies that sprang up to fill the new and growing fountain pen market. Waterman remained the market leader until the early 1920s.
At this time, fountain pens were almost all filled by unscrewing a portion of the hollow barrel or holder and inserting the ink by means of a dropper – a slow and messy procedure. Pens also tended to leak inside their caps and at the joint where the barrel opened for filling. Now that the materials' problems had been overcome and the flow of ink while writing had been regulated, the next problems to be solved were the creation of a simple, convenient self-filler and the problem of leakage. Self-fillers began to gain in popularity around the turn of the century; the most successful of these was probably the Conklin crescent-filler, followed by A. A. Waterman's twist-filler. The tipping point, however, was the runaway success of Walter A. Sheaffer's lever-filler, introduced in 1912, paralleled by Parker's roughly contemporary button-filler.
In 1898, George Safford Parker released the Parker Jointless, so named because its barrel was single-piece with no section joint to leak and stain the writer's fingers. The nib and feed assembly fit into the barrel's end like a cork stopper. In 1908, Waterman began marketing a popular safety pen of its own. For pens with non-retractable nibs, the adoption of screw-on caps with inner caps that sealed around the nib by bearing against the front of the section effectively solved the leakage problem (such pens were also marketed as "safety pens", as with the Parker Jack-Knife Safety and the Swan Safety Screw-Cap).
The decades that followed saw many technological innovations in the manufacture of fountain pens. Celluloid gradually replaced hard rubber, which enabled production in a much wider range of colors and designs. At the same time, manufacturers experimented with new filling systems. The inter-war period saw the introduction of some of the most notable models, such as the Parker Duofold and Parker Vacumatic, Sheaffer's Lifetime Balance series, and the Pelikan 100.
During the 1940s and 1950s, fountain pens retained their dominance: early were expensive, were prone to leaks and had irregular inkflow, while the fountain pen continued to benefit from the combination of mass production and craftsmanship. (Bíró's patent, and other early patents on ball-point pens often used the term "ball-point fountain pen," because at the time the ball-point pen was considered a type of fountain pen; that is, a pen that held ink in an enclosed reservoir.) This period saw the launch of innovative models such as the Parker 51, the Aurora 88, the Sheaffer Snorkel, and the Eversharp Skyline, while the Esterbrook J series of lever-fill models with interchangeable steel nibs offered inexpensive reliability to the masses.
The feed uses a series of narrow channels or "fissures" that run down its lower edge. As ink flows down these fissures, air is simultaneously allowed to flow upwards into the reservoir in an even exchange of volumes. The feed allows ink to flow when the pen is being put to paper but ensures ink does not flow when the pen is not in use. The feed makes use of capillary action; this is noticeable when a pen is refilled with a brightly coloured ink. The ink is taken up and into the feed by way of capillary action (and is often visible in clear demonstrator pens), but is not dispensed onto the paper until the nib makes contact.
How the feed is shaped may determine the wetness and flow of a particular pen. For this reason, feed material alone and its surface roughness may have a significant effect on the way two pens of the same nib size write.
Pen feeds are crucial to preventing ink from dripping or leaking. Feeds often feature finned structures intended for buffering fountain pen ink. Buffering is the capacity to catch and temporarily hold an overflow of ink, caused by conditions other than writing. When a fountain pen nib receives such an overflow it will result in ink blobbing or dripping also known as burping. A pen with a misconfigured feed might fail to deposit any ink whatsoever.
The nib narrows to a point where the ink is transferred to the paper. Extremely broad calligraphy pens may have several slits in the nib to increase ink flow and help distribute it evenly across the point, but such designs are more commonly found on dip pens. Nibs divided into three 'tines' are commonly known as music nibs. This is because their line, which can be varied from broad to fine, is suited for writing musical scores.
Broader nibs are used for less precise emphasis, with the benefit of a greater level of ink shading, a property wherein ink pools in parts of a stroke to cause variations in color or sheen – where dyes in ink crystallize on a page instead of absorbing into the paper, which leads to a different color being seen on less absorbent paper due to thin film interference. Finer nibs (e.g. extra fine and fine) may be used for intricate corrections and alterations, at the expense of shading and sheen. Oblique, reverse oblique, stub, and italic nibs may be used for calligraphy purposes or for general handwritten compositions. The line width of a particular nib may vary based on its country of origin; Japanese nibs are often thinner in general.
Fountain pens dating from the first half of the 20th century are more likely to have flexible nibs, suited to the favored handwriting styles of the period (e.g. Copperplate script and Spencerian script). By the 1940s, writing preferences had shifted towards stiffer nibs that could withstand the greater pressure required for writing through carbon paper to create duplicate documents.
Furthermore, competition between the major pen brands such as Parker and Waterman, and the introduction of lifetime guarantees, meant that flexible nibs could no longer be supported profitably. In countries where this rivalry was not present to the same degree, such as the UK and Germany, flexible nibs are more common.
Nowadays, stiff nibs are the norm as people exchange between fountain pens and other writing modes. These more closely emulate the ballpoint pens most modern writers are experienced with. Despite being rigid and firm, the idea that steel nibs write "horribly" is a misconception. More flexible nibs can be easily damaged if excessive pressure is applied to them. Ideally, a fountain pen's nib glides across the paper using the ink as a lubricant, and writing requires no pressure.
Good quality nibs that have been used appropriately are long lasting, often lasting longer than the lifetime of the original owner. Many vintage pens with decades-old nibs can still be used today.
Users are often cautioned not to lend or borrow fountain pens as the nib "wears in" at an angle unique to each individual person. A different user is likely to find that a worn-in nib does not write satisfactorily in their hand and, furthermore, creates a second wear surface, ruining the nib for the original user. This, however, is not a point of concern in pens with modern, durable tipping material, as these pens take many years to develop any significant wear.
After the eyedropper-filler era came the first generation of mass-produced self-fillers, almost all using a rubber sac to hold the ink. The sac was compressed and then released by various mechanisms to fill the pen.
Many other variations on the basic sac and pressure bar mechanism were introduced in the first decades of the 20th century, such as the coin-filler (with a slot on the barrel, allowing the pressure bar to be depressed by use of a coin), the matchstick-filler (with a round hole, for a matchstick) and the blow-filler (with a hole at the end of the barrel, through which one blew to compress the sac).
Parker introduced the button filler, which had a button hidden beneath a blind cap on the end of the barrel; when pressed, it acted on a pressure bar inside to depress the ink sac.
One of the most complex filling mechanisms was introduced in 1952 with the Sheaffer Snorkel. The Snorkel had an axial tube below the nib that could be extended, allowing the pen to be filled from a bottle without needing to immerse the nib or to wipe it off after filling. With the advent of the modern plastic ink cartridge in the early 1950s most of these filling systems were phased out.
Screw-mechanism piston-fillers were made as early as the 1820s, but the mechanism's modern popularity begins with the original Pelikan of 1929, based upon a patent that was initially licensed to a Croatian company Moster-Penkala by inventor Theodore Kovacs. The basic idea is simple and intuitive: turn a knob at the end of the pen and a screw mechanism draws a piston up the barrel, sucking in ink. Pens with this mechanism remain very popular today. Some of the earlier models had to dedicate as much as half of the pen length to the mechanism. The advent of telescoping pistons has improved this; the Touchdown Filler was introduced by Sheaffer in 1949. It was advertised as an "Exclusive Pneumatic Down-stroke Filler."
To fill it, a knob at the end of the barrel is unscrewed and the attached plunger is drawn out to its full length. The nib is immersed in ink, the plunger is pushed in, compressing and then releasing the ink sac by means of air pressure. The nib is kept in the ink for approximately 10 seconds to allow the reservoir to fill. This mechanism is very closely modeled after a similar pneumatic filler introduced by Chilton over a decade earlier.
Around the year 2000, Pelikan introduced a filling system involving a valve in the blind end of the pen, which mates with a specially designed ink bottle. Thus docked, ink is then squeezed into the pen barrel (which, lacking any mechanism other than the valve itself, has nearly the capacity of an eyedropper-fill pen of the same size). This system had been implemented only in their "Level" line, which was discontinued in 2006.
Most pens today use either a piston filler, squeeze-bar filler or cartridge. Many pens are also compatible with a converter, which has the same fitting as the pen's cartridge and has a filling mechanism and a reservoir attached to it. This enables a pen to fill either from cartridges or from a bottle of ink. The most common type of converters are piston-style, but many other varieties may be found today. Piston-style converters generally have a transparent round tubular ink reservoir. Fountain pen inks feature differing that can cause an ink to adhesion or "stick" against the inside of the reservoir. Common solutions for this problem are adding a small (rust-proof) ink agitating object like a 316L or 904L stainless steel or zirconium dioxide bearing ball, spring or hollow tube in the tubular reservoir to mechanically promote free movement of the contained ink and ink/air exchange during writing. Adding a very small amount of surfactant such as Triton X-100 used in Kodak Photo-Flo 200 wetting agent to the ink will chemically promote free movement of the contained ink and ink/air exchange during writing. However, ink might react adversely to adding a surfactant.
Vacuum fillers, such as those used by Pilot in the Custom 823, utilize air pressure to fill the ink chamber. In this case, while the nib is submerged in ink, a plunger is pushed down the empty chamber to create a vacuum in the space behind it. The end of the chamber has a section wider than the rest, and when the plunger passes this point, the difference in air pressure in the area behind the plunger and the area ahead of it is suddenly evened out and ink rushes in behind the plunger to fill the chamber.
Converters are also available in several different types such as piston, plunger, squeeze and push button in rare cases.
Also, converters that are meant to replace international cartridges can be used in most fountain pens that accept international cartridges. Some very compact fountain pens (for example Waterman Ici et La and Monteverde Diva) accept only short international cartridges. Converters can not be used in them (except for so-called mini-converters by Monteverde). Some pens (such as the modern Waterman models) have intentional fittings which prevent the usage of short cartridges. Such pens can only take a proprietary cartridge from the same manufacturer, in this case the long Waterman cartridges.
Corresponding converters to be used instead of such proprietary cartridges are usually made by the same company that made the fountain pen itself. Some very compact fountain pens accept only proprietary cartridges made by the same company that made that pen, such as Sheaffer Agio Compact and Sheaffer Prelude Compact. It is not possible to use a converter in them at all. In such pens the only practical way to use another brand of ink is to fill empty cartridges with bottled ink using a syringe.
Standard international cartridges are closed by a small ball, held inside the ink exit hole by glue or by a very thin layer of plastic. When the cartridge is pressed into the pen, a small pin pushes in the ball, which falls inside the cartridge. The Parker and Lamy cartridges do not have such a ball. They are closed by a piece of plastic, which is broken by a sharp pin when inserted in the pen.
While cartridges are more convenient to refill than bottle filling, converter and bottle filling systems are still sold. Non-cartridge filling systems tend to be slightly more economical in the long run since ink is generally less expensive in bottles than in cartridges. Advocates of bottle-based filling systems also cite less waste of plastic for the environment, a wider selection of inks, easier cleaning of pens (as drawing the ink in through the nib helps dissolve old ink), and the ability to check and refill inks at any time.
Fountain pens are not as tightly coupled with their inks as ballpoint pen or are, yet some care must be taken when selecting their inks. Contemporary fountain pen inks are almost exclusively dye-based because pigment particles usually clog the narrow passages.
Traditional iron gall inks intended for dip pens are not suitable for fountain pens as they will corrode the pen (a phenomenon known as flash corrosion) and destroy the functionality of the fountain pen. Instead, modern surrogate iron gall formulas are offered for fountain pens. These modern iron gall inks contain a small amount of ferro gallic compounds that are gentler for the inside of a fountain pen, but can still be corrosive if left in the pen for a long period. To avoid corrosion on delicate metal parts and ink clogging, a more thorough than usual cleaning regime – which requires the ink to be flushed out regularly with water – is sometimes advised by manufacturers or resellers.
Some pigmented inks do exist for fountain pens, such as "Carbon Black" and "Chou Kuro" made by the brand Platinum as well as Rohrer & Klingner and De Atramentis inks from Germany, but these are uncommon. Normal India ink cannot be used in fountain pens because it contains shellac as a binder which would very quickly clog such pens.
Inks ideally should be fairly free-flowing, free of sediment, and non-corrosive, though this generally excludes permanence and prevents large-scale commercial use of some colored dyes. Proper care and selection of ink will prevent most problems.
Fountain pens can serve various artistic purposes such as expressive penmanship and calligraphy, pen and ink artwork, and professional art and design. Many users also favor the perceived elegance, personalization, and sentimentality associated with fountain pens, which computers and ballpoint pens seem to lack, and often state that once they start using fountain pens, ballpoints become awkward to use due to the extra motor effort needed and lack of expressiveness. For ergonomics, fountain pens may relieve physiological stress from writing; alternatives such as the ballpoint pen can induce more pain and damage to those with arthritis. Some also believe they could improve academic performance.
In some countries, fountain pens are usual in lower school grades, believed to teach children better control over writing as many common mistakes of people not used to handwriting (like too much pressure or incorrect hold) feel unnatural or are almost impossible when using traditional pen tips.
Fountain pens are a popular collectable. Fancier pens have been made of and sometimes even inlaid with Gemstone. Some are decorated with lacquer, including Japanese maki-e. Avid communities of pen enthusiasts collect and use antique and modern pens and also collect and exchange information about old and modern inks, ink bottles, and . Collectors may decide to use the antiques in addition to showcasing them in closed spaces such as glass displays.
News outlets report that rather than declining, fountain pen sales have been steadily rising over the last decade. There is a clear resurgence in the appeal and culture of the fountain pen, whether for purposes of collection, enjoyment or as a "lifestyle item". Many agree that the "personal touch" of a fountain pen has led to such a resurgence with modern consumers looking for an alternative in a world of digital products and services.
Amazon reported "sales so far this year 2012 have doubled compared with the same period in 2011. They are four times higher than 2010." The popularity of fountain pens continues to show growth. The market-research firm Euromonitor reported that fountain pen retail sales were up 2.1% in 2016 from a year earlier, reaching $1.046 billion.
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