Laser Toner

What is Toner?

Laser Toner is a dry ink powder which has been electrically charged. Used in laser printers, fax machines and copiers. Generally, the image is translated into bit mapped charges of the opposite polarity on a special drum in the printer. The toner is attracted to the charged areas, where it is transferred to paper. The toner is then "set", usually by heat. For many laser printers such as Hewlett Packard LaserJet and Canon toner comes in a complete print cartridge which includes both the toner and the drum. These all in one print cartridges are very popular with customers. Other companies such as Brother prefer to separate out the toner cartridge from the drum unit - in theory this has benefits in terms of the overall print cost per page.

 

|The laser printing process is based on static electricity. Oppositely charged atoms are attracted to each other while objects with opposite static electricity fields cling together A laser printer uses this system the core of which is the photoreceptor (revolving drum). The drum assembly is made out of highly photoconductive material that is discharged by light photons. The drum is given a total positive charge by the charge corona wire, a wire with an electrical current running through it. (Some makes and models of laser printer use a charged roller instead of a corona wire, but the principle is the same.) As the drum revolves a laser beam is shone across the surface to discharge certain points. In this way, the laser draws the letters and images to be printed as a pattern of electrical charges or an electrostatic image. This principal also works in reverse where a positive electrostatic image on a negative background. After the pattern is set, the printer coats the drum with positively charged toner which clings to the negative discharged areas of the drum, but not to the positively charged areas. With the toner affixed, the drum rolls over a sheet of paper, film card etc, which is moving along a belt below. Before the media rolls under the drum, it is given a negative charge by the transfer corona wire. This charge is stronger than the negative charge of the electrostatic image, so the paper can pull the toner  away. Since it is moving at the same speed as the drum, the paper picks up the image pattern exactly. To keep the paper from clinging to the drum, it is discharged by the corona wire immediately after picking up the toner.

The printer then passes the paper (or other media) through the fuser (typically a pair of heated rollers). As the paper passes through the fuser, the loose toner powder melts, fusing with the fibres in the paper. The fuser rolls the paper to the output tray, and you have your finished printed page. After depositing toner on the paper, the drum surface passes the discharge lamp. This bright light exposes the entire photoreceptor surface, erasing the electrical image. The drum surface then passes the charge corona wire, which reapplies the positive charge.

The image or text or graphical image that is printed comes from the printer controller board which is the laser printer's main onboard computer. It interchanges information and data with the PC or host computer talking typically in either PCL , GDI or PostScript. Hewlett Packard's Printer Command Language (PCL) and Adobe's Postscript are the two most common languages for laser printer controller boards.GDI graphical device interface printers are also available. Both PCL and PostScript describe the page in vector form then the printer takes the vector images and converts them into a bitmap page. With this system, the printer can receive elaborate, complex pages, featuring any sort of font or image. Also, since the printer creates the bitmap image itself, it can use its maximum printer resolution. In most laser printers, the controller must organize all of the data it receives from the host computer. This includes all of the commands that tell the printer what to do -- what paper to use, how to format the page, how to handle the fonts etc. Unlike most inkjet printers, laser printers typically have their own memory which is another reason why they are better suited to networked PC usage.

The process for printing on colour laser printers is very similar, the main difference being the four colours black, cyan, yellow and magenta meaning that each process is repeated for each colour used, except on the more expensive colour lasers which have complete units - laser assembly, drum and toner for each colour. This speeds up the colour printing process.

 

Best Laser Toner

The Best Quality Toners at Maximum Discount Prices. Currently we have some extra Special Offers on Generic:
 

 

There are many reasons to buy Printer Cartridges from us - Big Discounts, Premium Quality, Extra Special Offers, Free Delivery - whatever your reason - THANK YOU for your business.

 

LaserJet Cartridges

Sometimes people search on line for the cheapest toner cartridges, or cheap laser toners but often end up disappointed by the Laser Cartridges that they receive as cheap means cheap!. That is why more and more people are ordering from ourselves to guarantee the highest quality at the very lowest price. Get the best laser toner cartridges online. Free next delivery on all LaserJet toners & toner cartridges for HP LaserJet, Brother, Samsung, OKI, Dell and Canon printers.

 

So what is toner? Toner is quite simply the "stuff" that allows you to see the printed image. You could of course opt for a printer that uses ink, however business users tend to prefer lasers for their speed, cost per page and also noise level. If you are working next to a printer then you will soon notice the difference between the noise output of an inkjet and Laser. Laser printers work the same basic way as photocopiers, with the most obvious difference being the source of the image. A photocopier scans an image by reflecting a bright light off of it, while a laser printer receives the image in digital form. Another major difference is how the electrostatic image is created. When a photocopier bounces light off a piece of paper, the light reflects back onto the photoreceptor from the white areas but is absorbed by the dark areas. In this process, the "background" is discharged, while the electrostatic image retains a positive charge. This method is called "write-white." In most laser printers, the process is reversed: The laser discharges the lines of the electrostatic image and leaves the background positively charged. In a laser printer, this "write-black" system is easier to implement than a "write-white" system, and it generally produces better results.

 

CHEAP TONER CARTRIDGES

Cheap Toner Cartridges can sometimes not be a good idea. Often the cheap in the price also relates to the quality of the finished product as well. We prefer to use the terms low cost or discount instead. If you want a cheap cartridge and price is all important then perhaps we are not the right place, however is you want THE BEST VALUE FOR MONET TONER CARTRIDGES then you have indeed come to the right place!

 

 

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