Xerography, also known as electrophotography, is a printing and photocopying technique that works on the basis of electrostatic charges. The xerography process is the dominant method of reproducing images and printing computer data and is used in photocopiers, laser printer s and fax machines.

When was xerography used for?

xerography, Image-forming process that relies on a photoconductive substance whose electrical resistance decreases when light falls on it. Xerography is the basis of the most widely used document-copying machines (see photocopier). The process was invented in the 1930s by U.S. physicist Chester F.

What are the advantages of xerography?

The advantages of xerography include high resolving power, very rapid controlled development in any colour, over-printing capacity, and low cost.

Why was xerography invented?

In 1938, Chester Carlson invented xerography out of two natural phenomena already known: materials of opposite electrical charges are attracted, and certain materials become better conductors of electricity when exposed to light.

Why Selenium is used in xerography?

Selenium is used because it is able to hold and conduct charges in the absence and presence of light. Once the photo-conductor is charged a document begins to pass over the rotating drum. In most printing devices a laser is used to illuminate the document which projects an image onto the drum.

Xerographic Process

31 related questions found

What is xerography used for in animation?

Uses in animation

Ub Iwerks adapted xerography to eliminate the hand-inking stage in the animation process by printing the animator's drawings directly to the cels. ... At first, only black lines were possible, but in the 1980s, colored lines were introduced and used in animated features like The Secret of NIMH.

What is the principle of xerography?

Electrophotography, more commonly known as xerography, is based on the formation of a latent electrostatic image on an imaging surface by first uniformly electrostatically charging the surface of the imaging layer in the dark and then exposing this electrostatically charged surface to a light and shadow image.

How does Xerox work vs xerography?

Photocopier working principle

Most modern photocopiers rely on a technology known as xerography, which is essentially a dry photocopying technique. It involves using electrically-charged particles to attract and then deposit toner particles onto a piece of paper.

When were xerography first invented?

The xerographic process, which was invented by Chester Carlson in 1938 and developed and commercialized by the Xerox Corporation, is widely used to produce high-quality text and graphic images on paper.

What is Xerox animation?

Xerox process Electrostatic process adapted for transferring animators' pencil drawings to cels. ... The process was then used in practically every Disney animated film up through The Little Mermaid, after which the computer obviated the need for cels.

What is the first film to use the technology of xerography?

Thanks to Iwerks, 101 Dalmatians was the first film to use a xerography (or “Xerox”) process. When I say Xerox, you probably immediately think of a photocopy. “Oh so they photocopied all the dogs! That's why there's so many!

Who invented toner?

Chester Carlson invented xerography in 1938; that invention has snowballed to today's toner cartridge.

What is the meaning of xerographic?

1 : a process for copying graphic matter by the action of light on an electrically charged photoconductive insulating surface in which the latent image is developed with a resinous powder (such as toner)

What is a mimeograph used for?

A mimeograph is an old-fashioned copy machine. Mimeographs were often used for making classroom copies in schools before photocopying became inexpensive in the mid- to late-twentieth century.

How did Xerox fail?

Xerox's failure to commercialize its own inventions was partly due to the disconnect between those ideas and its core business making copiers. ... As such, even as their team made great technologies, Xerox failed to combine this innovation with sustainably profitable business models.

What is the purpose of a photocopier?

The main function of a photocopier is to produce paper copies of a document. Most photocopiers use laser technology, a dry process that uses electrostatic charges on a light-sensitive photoreceptor to transfer toner onto paper to form an image.

Why is the photocopier an important office machine?

With no office photocopier, it's sure that offices won't have the ability to finish their jobs. All these are achievable because these machines have a unique photocopying technology which permits you to create an increasing number of copies of one file immediately and efficiently. ...

How does electrostatics work in a photocopier?

Negatively charged powder spread over the surface adheres through electrostatic attraction to the positively charged image areas. A piece of paper is placed over the powder image and then given a positive charge. ... Finally, heat fuses the powder image to the paper, producing a copy of the original image.

What are the advantages of laser printer?

Despite higher toner expense and initial costs, laser printers are more economical, producing printed pages at a significantly lower cost per copy. Laser printers are more efficient, printing pages more quickly than comparable inkjet printers perform. The printing process is noticeably quieter with a laser printer vs.

Which of the following element is is used in electrophotography?

Suitable materials for the use in such systems include anthracene, sulfur, and selenium. In addition to anthracene, other organic photoconductive materials most attractive to PVK have been the focus of interest in electrophotography.