![]() Some examples of laser printers include:. The price of laser printers range from $140-$12000 Examples of laser printers: Laser printers are not good in colour printing and are expensive also. In these printers, 1 sheet is printed four times. These printers can hold more than 25,00 sheets.ĥ) Colour laser printers: Color printers use 4 colours (Cyan, magenta, yellow and black). They can stand on the floor and needs a dedicated operator for its working. They can hold about 15,00 to 25,00 sheets at a time.Ĥ) Production laser printer: Production printers are high-speed printers. Workgroup printers are large and some are small also so that it can adjust on the desk. Office printer can hold about 250 sheets at a time.ģ) Workgroup laser printer: These printers are usually used in the network of computers. These type of printers can print at 8-12 p.p.m (pages per minute). They are not very large and can fit with other computer accessories. It can hold about 100 sheets at a time.Ģ) Office laser printer: Office printers are larger than personal computers. It can print at the rate of 4 pages per minute. ![]() There are 5 types of laser printers which include:-ġ) Personal laser printer: Personal laser printer is of small size and can easily fit inside room beside the computer. ![]() The powder also known as toner is then pasted on the electrically charged paper through a laser beam. The paper is then charged by electricity using selenium coated drum. Thanks to our friends at software firms and symphonies, public schools and physics labs, semiconductor fabs and ice cream parlors, in about a dozen countries around the world.Example of laser printer How laser printer works:Ī paper is inserted into the laser printer. We welcome additional statements by manufacturers, resellers, or technicians. at Druckerchannel) we relied on printer manuals and other manufacturer statements. We looked at printer output under a blue light and/or a computer microscope we consulted press reports about printers (e.g. We have employed three sources of information. In most cases, we are confident that the arrangement of dots is intentional and is intended to track users. In a very few cases, for example, they might be the result of a dithering technique, rather than a forensic mark, or they could be the result of a poorly calibrated printer. Until we decipher the marking schemes or receive other confirmation, this does not constitute proof that any particular kind of information is represented by these dots. Other forensic marking techniques have been invented, and we do not yet know how to determine whether these techniques are used by a particular printer.)Ī "yes" simply means that we (or another source, as noted) saw yellow dots that appeared anomalous to us. (For example, the HP Color LaserJET 8500 series does not include any yellow tracking dots that we can see, but it may still include some kind of forensic marking, since the majority of other Color LaserJET models do. Limitations of this informationĪ "no" simply means that we couldn't see yellow dots it does not prove that there is no forensic watermarking present. We tried to interpret the information conveyed by these dots as part of our Machine Identification Code Technology Project. This is a list of color laser printer models that do or do not print yellow tracking dots on their output. THIS ALSO INCLUDES THE PRINTERS THAT ARE LISTED HERE AS NOT PRODUCING YELLOW DOTS.įorensic investigations of the source of documents produced with other printing technologies are also possible, but, as far as we know, printers other than color laser and similar technologies do not deliberately encode their serial numbers in their output. THIS IS TRUE WHETHER OR NOT THOSE CODES ARE VISIBLE TO THE EYE AND WHETHER OR NOT THE PRINTER MODELS ARE LISTED HERE. (Added 2017) REMINDER: IT APPEARS LIKELY THAT ALL RECENT COMMERCIAL COLOR LASER PRINTERS PRINT SOME KIND OF FORENSIC TRACKING CODES, NOT NECESSARILY USING YELLOW DOTS. (If any manufacturer wishes to go on record with a statement to the contrary, we'll be happy to publish that here.) Although we still don't know if this is correct, or how subsequent generations of forensic tracking technologies might work, it is probably safest to assume that all modern color laser printers do include some form of tracking information that associates documents with the printer's serial number. (Added 2015) Some of the documents that we previously received through FOIA suggested that all major manufacturers of color laser printers entered a secret agreement with governments to ensure that the output of those printers is forensically traceable.
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