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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| History of printing | 14/16 | https://en.wikipedia.org/wiki/History_of_printing | reference | science, encyclopedia | 2026-05-05T04:00:12.806227+00:00 | kb-cron |
A dot matrix printer or impact matrix printer is a type of computer printer with a print head that runs back and forth on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper, much like a typewriter. Unlike a typewriter or daisy wheel printer, letters are drawn out of a dot matrix, and thus, varied fonts and arbitrary graphics can be produced. Because the printing involves mechanical pressure, these printers can create carbon copies and carbonless copies.
Each dot is produced by a tiny metal rod, also called a "wire" or "pin", which is driven forward by the power of a tiny electromagnet or solenoid, either directly or through small levers (pawls). Facing the ribbon and the paper is a small guide plate (often made of an artificial jewel such as sapphire or ruby) pierced with holes to serve as guides for the pins. The moving portion of the printer is called the print head, and when running the printer as a generic text device generally prints one line of text at a time. Most dot matrix printers have a single vertical line of dot-making equipment on their print heads; others have a few interleaved rows in order to improve dot density. The first dot-matrix printers were invented in Japan. In 1968, Japanese manufacturer Epson released the EP-101, the world's first dot-matrix printer. The same year, Japanese manufacturer OKI introduced the first serial impact dot matrix printer (SIDM), the OKI Wiredot.
== Thermal printer ==
A thermal printer (or direct thermal printer) produces a printed image by selectively heating coated thermochromic paper, or thermal paper as it is commonly known, when the paper passes over the thermal print head. The coating turns black in the areas where it is heated, producing an image.
== Laser printer (1969) ==
The laser printer, based on a modified xerographic copier, was invented at Xerox in 1969 by researcher Gary Starkweather, who had a fully functional networked printer system working by 1971. Laser printing eventually became a multibillion-dollar business for Xerox. The first commercial implementation of a laser printer was the IBM 3800 in 1976, used for high-volume printing of documents such as invoices and mailing labels. It is often cited as "taking up a whole room," implying that it was a primitive version of the later familiar device used with a personal computer. While large, it was designed for an entirely different purpose. Many 3800s are still in use. The first laser printer designed for use with an individual computer was released with the Xerox Star 8010 in 1981. Although it was innovative, the Star was an expensive ($17,000) system that was only purchased by a small number of laboratories and institutions. After personal computers became more widespread, the first laser printer intended for a mass market was the Hewlett-Packard LaserJet 8ppm, released in 1984, using a Canon engine controlled by HP software. The HP LaserJet printer was quickly followed by other laser printers from Brother Industries, IBM, and others. Most noteworthy was the role the laser printer played in popularizing desktop publishing with the introduction of the Apple LaserWriter for the Apple Macintosh, along with Aldus PageMaker software, in 1985. With these products, users could create documents that would previously have required professional typesetting.
== Inkjet printer ==
Inkjet printers are a type of computer printer that operates by propelling tiny droplets of liquid ink onto paper. There are two types of inkjet technologies: Continuous and Drop-On-Demand. Continuous inkjet flows a continuous pressurized stream of ink toward a paper. Electrically charged droplets are deflected by an electrical field to print on paper or go into a basin and reused. Drop-On-Demand inkjets propel single drops with each electrical pulse. Hot-melt inks were introduced in 1984. Hot-melt inks printed in full color.
== Dye-sublimation printer ==
A dye-sublimation printer (or dye-sub printer) is a computer printer which employs a printing process that uses heat to transfer dye to a medium such as a plastic card, printer paper or poster paper. The process is usually to lay one color at a time using a ribbon that has color panels. Most dye-sublimation printers use CMYO colors which differs from the more recognized CMYK colors in that the black dye is eliminated in favour of a clear overcoating. This overcoating (which has numerous names depending on the manufacturer) is effectively a thin laminate which protects the print from discoloration from UV light and the air while also rendering the print water-resistant. Many consumer and professional dye-sublimation printers are designed and used for producing photographic prints.
== Digital press (1993) ==
Digital printing is the reproduction of digital images on a physical surface, such as common or photographic paper or paperboard-cover stock, film, cloth, plastic, vinyl, magnets, and labels. It can be differentiated from litho, flexography, gravure or letterpress printing in many ways, some of which are;
Every impression made onto the paper can be different, as opposed to making several hundred or thousand impressions of the same image from one set of printing plates, as in traditional methods. The ink or toner does not absorb into the substrate, as does conventional ink, but forms a layer on the surface and may be fused to the substrate by using an inline fuser fluid with heat process (toner) or UV curing process (ink). It generally requires less waste in terms of chemicals used and paper wasted in set up or makeready (bringing the image "up to color" and checking position). It is excellent for rapid prototyping, or small print runs which means that it is more accessible to a wider range of designers and more cost effective in short runs.
== 3D printing ==