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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 copiers produce on every printed page that identifies the specific device that was used to print the document.
Printer Command Language, more commonly referred to as PCL, is a page description language (PDL) developed by Hewlett-Packard as a printer protocol and has become a de facto industry standard. Originally developed for early inkjet printers in 1984, PCL has been released in varying levels for thermal , matrix , and page printers.
History of printing. Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. [1]
Printer Command Languages (PCLs) govern how printers work. The PCL language was developed by Hewlett-Packard as a printer protocol for the early inkjet printers in 1984. PCL has since become a de facto industry standard so that software can print successfully to any brand of printer.
Printer Command Language Reference. Functional reference. PCL escape sequences are summarised by function in the tables (right). RedTitan EscapeE may be used to view PCL or PDF and convert to Adobe Postscript, PDF, IBM AFP, or XEROX metacode formats. Links. PCL font selection. PCL symbol sets selection. PCL typeface selection. PCL to PDF.
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 copiers produce on every printed page
14 Ιουν 2024 · Tracking codes in printers are created by firmware and reveal printer info and timestamps. Tracking codes, present since the '80s, facilitate law enforcement but pose privacy risks. Printers embed hidden yellow dots on pages, revealing who printed what and when.
