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Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was used to print the document.
An original sheet is exposed to the before said heat source in conjunction with future copy paper generating a copy on its specially treated surface. Is a kind of photocopy based on the effect of heat - When the black parts of the heat-sensitive paper generate some type of chemical reaction. [1] The heat lamp makes indirect revealing.
A Xerox digital photocopier in 2010. A photocopier (also called copier or copy machine, and formerly Xerox machine, the generic trademark) is a machine that makes copies of documents and other visual images onto paper or plastic film quickly and cheaply.
Toshiba invested a total of ¥319.9 billion in R&D in the year ended 31 March 2012, equivalent to 5.2 percent of sales. [116] Toshiba registered a total of 2,483 patents in the United States in 2011, the fifth-largest number of any company (after IBM, Samsung Electronics, Canon and Panasonic). [116]
Duplicating machines were the predecessors of modern document-reproduction technology. They have now been replaced by digital duplicators, scanners , laser printers , and photocopiers , but for many years they were the primary means of reproducing documents for limited-run distribution.
The photographic prints produced by such machines are commonly referred to as "photostats" or "photostatic copies". The verbs "photostat", "photostatted", and "photostatting" refer to making copies on such a machine in the same way that the trademarked name "Xerox" was later used to refer to any copy made by means of electrostatic photocopying ...
Photographic printing is the process of producing a final image on paper for viewing, using chemically sensitized paper.The paper is exposed to a photographic negative, a positive transparency (or slide), or a digital image file projected using an enlarger or digital exposure unit such as a LightJet or Minilab printer.
ZE – Glow modulator tube, a linear light source for rotating-drum FAX receivers, film soundtrack recording, etc. ZF – Flash tube; ZL – Gas laser; ZM – Cold cathode character display tube or counter display tube; ZP – Radiation counter tube (Geiger-Müller counter tube or proportional counter tube) ZQ – Mixed analogue and digital display