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In printing, under color removal (UCR) is a process of eliminating overlapping yellow, magenta, and cyan that would have added to a dark neutral (black) and leaving the black ink only, called a full black, during the color separation process. Under color removal is used in process color printing.
Refilling kits include printer-specific instructions. The following basic types of refill toner (differing mainly in particle size and fusing temperature) have been identified by one vendor while other refill vendors insist that each printer or copier model requires a unique type. [citation needed] HP, Canon printers; Canon PC copiers
In printing, set-off is the term given to the unwanted transfer of ink from one printed sheet to another. The problem can occur with most types of printing, and is avoided by the use of slipsheets between copies (so any ink transfer occurs onto discardable paper) or anti-set-off spray powder.
The printing depends on the smooth flow of ink, which can be hindered if the ink begins to dry at the print head, as can happen when an ink level becomes low. Dried ink can be cleaned from a cartridge print head using 91% denatured isopropyl alcohol (not rubbing alcohol). [5]
The trap is not visible since the lighter color is spread underneath the—almost—opaque black. For the same reason, in many cases, black ink is set to "overprint" colors in the background, eliminating the more complex process of spreading or choking. Since black is a dark color, white gaps caused by misregistration are more visible.
Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. [1] Inkjet printers were the most commonly used type of printer in 2008, [2] and range from small inexpensive consumer models to expensive professional machines.
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.
Overprinting also refers to the printing of additional information onto self-adhesive labels and product packaging. "Best Before", "Use By" dates and batch codes are printed in situ onto product packaging as the items are packed. Generally thermal printers, ink jet printers or laser printers are used.