Question

What is the Electrostatic Printing - What is electrostatic printing??

Accepted Answer

A method of printing  this process creates an image by using static electricity to attract toner to specific areas of a substrate and is one of the earliest dry printing processes to be invented  The substrate is usually paper that has been coated to improve its dielectric strength and given a negative  or positive  charge         Electrostatic printing involves two steps  first  a latent image is created on the substrate  an    invisible    image that is created by exposing a photosensitive material to light  and then the latent image is processed  toner is applied and bonded in place  to create the finished image         The paper substrate is photoconductive  meaning that it becomes more conductive of electricity when exposed to light  To create a latent image  light is passed through or reflected off a document that is being copied or is used to project an original image onto the photoconductive paper  In the copied document  the    content    of the image will block or absorb light while the    non-content     blank  white areas  will allow light to pass through or reflect light onto the paper  In the original image  a negative of the image is projected so that the    non-content    is projected directly onto the paper  Where light falls onto the paper  the negative  or positive  charge is discharged  creating a latent image of the original made up of negatively  or positively  charged areas of the substrate         To process the latent image into a visual finished image  the paper will then pass a toner cartridge  the toner particles have a positive  or negative  charge  meaning that they will be attracted to the charged areas of the paper  The toner is then bonded in place using heat and pressure generated by a fuser unit         Electrostatic printing can be used to create monochromatic images  one toner is used to create images made up of different shades of that one colour  usually black  or colour images  there are four toners - one for each of the four process colours - which are applied in sequence  with the process of charging and discharging specific areas of the paper being repeated before each colour is applied          Electrostatic printing was invented in 1778  today  there are still some electrostatic printers available but the process is more commonly used as one part of other  more modern  printing methods such as xerography and laser printing

Dielectric Strength - What is dielectric strength?

Definition of DIELECTRIC STRENGTH: