A pen is a common writing instrument used to apply ink to a surface, usually paper, for writing or drawing. Historically, reed pens, quill pens, and dip pens were used, later a nib dipped in ink. Ruling pens permit correct getting used to of parentage width, and nevertheless locate a few specialized uses, but rarefied pens such as the Rapidograph are more commonly used. radical types improve ballpoint, rollerball, fountain and felt or ceramic tip pens.
The main forward looking types of pens can be categorized by the nice of writing tip or point upon the pen:
A ballpoint pen dispenses an oil-based ink by rolling a little hard sphere, usually 0.51.2 mm and made of brass, steel, or tungsten carbide. The ink dries around unexpectedly upon entry once paper. The ballpoint pen is usually reliable and comes in both reasonable and costly types. It has replaced the fountain pen as the most common tool for unidentified writing. (There are determined ballpoint pens combining combined colours in a single barrel; the writer or performer may afflict the tip past the desired colour). Lszl Br patented the first commercially affluent ballpoint pen.
A rollerball pen dispenses a water-based liquid or gel ink through a ball tip similar to that of a ballpoint pen. The less-viscous ink is more easily absorbed by paper than oil-based ink, and the pen moves more easily across a writing surface. The rollerball pen was initially expected to attach the ease of access of a ballpoint pen next the mild "wet ink" effect of a fountain pen. Gel inks are reachable in a range of colors, including metallic paint colors, glitter effects, neon, blurred effects, saturated colors, pastel tones, full of beans shades, shady colors, invisible ink, see-through effect, shining colors, and glow-in-the-dark effects. Refillable rollerball pens have recently become nearby using cartridges of fountain pen ink.
A fountain pen uses water-based liquid ink delivered through a nib. The ink flows from a reservoir through a "feed" to the nib, then through the nib, due to capillary con and gravity. The nib has no upsetting parts and delivers ink through a skinny slit to the writing surface. A fountain pen reservoir can be refillable or disposable; the disposable type is called an ink cartridge. A pen past a refillable reservoir may have a mechanism, such as a piston, to glamor ink from a bottle through the nib, or it may require refilling in imitation of an eyedropper. Refill reservoirs, in addition to known as cartridge converters, are reachable for some pens which use disposable cartridges. A fountain pen can be used in the same way as surviving or non-permanent inks.
A felt-tip pen, or marker, has a permeable tip of fibrous material. The smallest, finest-tipped felt-tip pens are used for writing on paper. Medium-tipped felt-tips are often used by children for coloring and drawing. Larger types, often called "markers", are used for writing in larger sizes, often on other surfaces such as corrugated boxes, whiteboards and for chalkboards, often called "liquid chalk" or "chalkboard markers". Markers in the same way as wide tips and shiny but transparent ink, called highlighters, are used to highlight text that has already been written or printed. Pens intended for children or for performing arts writing (as behind a whiteboard or overhead projector) typically use non-permanent inks. Large markers used to label shipping cases or additional packages are usually permanent markers.
A gel pen uses ink in which pigment is suspended in a water-based gel. Because the ink is thick and opaque, it shows going on more suitably on dark or slick surfaces than the typical inks used in ballpoint or felt tip pens. Gel pens can be used for many types of writing and illustration. Gel pens often arrive in shining or neon colors.
A stylus pen, plural styli or styluses, is a writing utensil or a little tool for some other form of marking or shaping, for example, in pottery. It can along with be a computer adjunct that is used to back in navigating or providing more accurateness following using touchscreens. It usually refers to a narrow lengthy staff, similar to a liberal ballpoint pen. Pens exist which contain a ballpoint tip upon one end and this sort of touchscreen stylus on the other.
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