What is Electrophotography?

- Feb 09, 2018 -



Electrophotography is a dry copy method used to create an image copy using a static charge similar to static electricity. Chester Carlson invented this technique in 1938, calling it electrophotography. Later the term became electrostatics, made up of the Greek "xeros" and "-graphia," forming "dry writing." At Carlson's invention, all copying required liquid chemicals. Although the original invention takes a long time, involving manual labor, but does not involve liquid substances, a great technological progress.

In order to generate images without the use of liquid chemicals, electrophotography machines generate static electricity, charge images and transfer images to blank paper. Electrophotography is commonly used in photocopiers and some printers, such as LEDs and laser printers. The process of copying took less than a minute, but five steps each.

First, a metal cylinder inside the machine is charged. The drums are charged differently depending on the type of copy being made and the type of copy of the copy. When the drum is charged, bright light shines on the image and the light and dark areas are copied onto the charged drum. The charged toner is attracted by the particles on the drum and covers the drum, creating a copy of the original image.

After the first three phases, the process enters the transfer phase. A piece of paper through the drum to capture images. Electrostatic energy and a certain amount of pressure will cause the toner to move to the paper and create a detailed copy of the original photo. In the final stage, the particles lose their charge and use heat, pressure or both to ensure that the image adheres to the paper. The user then receives the copied image.


After the first three phases, the process enters the transfer phase. A piece of paper through the drum to capture images. Electrostatic energy and a certain amount of pressure will cause the toner to move to the paper and create a detailed copy of the original photo. In the final stage, the particles lose their charge and use heat, pressure or both to ensure that the image adheres to the paper. The user then receives the copied image.

The original machine using electrophotography involves multiple steps, each requiring the user to perform a task to move the process. It took nearly 20 years to make a breakthrough and brought a fully automatic copier to the world. The first automatic copier on the market was created by Haloid / Xerox, which later became a popular Xerox brand and is known for selling printers and copiers and other common office equipment.

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Editor’s Note: This post was Updated by Proffisy on 09 Feb,2018.


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