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, when a nib dipped in ink. Ruling pens permit perfect adaptation of lineage width, and still find a few specialized uses, but rarefied pens such as the Rapidograph are more commonly used. avant-garde types supplement ballpoint, rollerball, fountain and felt or ceramic tip pens.
The main advanced types of pens can be categorized by the nice of writing tip or dwindling on the pen:
A ballpoint pen dispenses an oil-based ink by rolling a small difficult sphere, usually 0.51.2 mm and made of brass, steel, or tungsten carbide. The ink dries almost tersely on open when paper. The ballpoint pen is usually well-behaved and comes in both within your means and costly types. It has replaced the fountain pen as the most common tool for unmemorable writing. (There are sure ballpoint pens combining fused colours in a single barrel; the writer or performer may sadden the tip taking into consideration the desired colour). Lszl Br patented the first commercially booming 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 insert the convenience of a ballpoint pen subsequent to the smooth "wet ink" effect of a fountain pen. Gel inks are user-friendly in a range of colors, including metallic paint colors, glitter effects, neon, blurred effects, saturated colors, pastel tones, bustling shades, shady colors, invisible ink, see-through effect, bright colors, and glow-in-the-dark effects. Refillable rollerball pens have recently become within reach 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, next through the nib, due to capillary acquit yourself and gravity. The nib has no disturbing parts and delivers ink through a thin slit to the writing surface. A fountain pen reservoir can be refillable or disposable; the disposable type is called an ink cartridge. A pen when a refillable reservoir may have a mechanism, such as a piston, to attraction ink from a bottle through the nib, or it may require refilling next an eyedropper. Refill reservoirs, moreover known as cartridge converters, are straightforward for some pens which use disposable cartridges. A fountain pen can be used subsequently steadfast or non-permanent inks.
A felt-tip pen, or marker, has a spongy 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 new surfaces such as corrugated boxes, whiteboards and for chalkboards, often called "liquid chalk" or "chalkboard markers". Markers like broad tips and shiny but transparent ink, called highlighters, are used to highlight text that has already been written or printed. Pens intended for kids or for drama writing (as taking into account a whiteboard or overhead projector) typically use non-permanent inks. Large markers used to label shipping cases or extra packages are usually steadfast 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 taking place more usefully upon 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 come in shining or neon colors.
A stylus pen, plural styli or styluses, is a writing utensil or a little tool for some extra form of marking or shaping, for example, in pottery. It can moreover be a computer addition that is used to help in navigating or providing more precision similar to using touchscreens. It usually refers to a narrow lengthy staff, similar to a objector ballpoint pen. Pens exist which contain a ballpoint tip on one stop and this sort of touchscreen stylus upon the other.
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