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Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) 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 ...
All printers are to be set up using priming cartridges. These cartridges are for calibration purposes, and not used in the actual testing procedure. Testing of print devices is to be done in a semi-continuous mode at rated speed.
In printing, registration black is a black color that includes 100% of each of the process colors used. Typically these are cyan, magenta, yellow and black , [4] but if different colors are used, registration black marks are made with all of the colorants (inks). [4] Registration black is used for printing crop marks and registration marks ...
The CMYK color model is based on the CMY color model, which omits the black ink. Four-color printing uses black ink in addition to subtractive primaries for several reasons: [2] In traditional preparation of color separations, a red keyline on the black line art marked the outline of solid or tint color areas. In some cases a black keyline was ...
In addition to the widely used small inkjet printers for home and office, there are professional inkjet printers, some for "page-width" format printing and many for wide format printing. Page-width format means that the print width ranges from about 8.5–37 in (22–94 cm). "Wide format" means print width ranging from 24" up to 15' (about 60 ...
Color printers usually have a higher cost per page than monochrome printers, even if printing monochrome-only pages. Liquid electrophotography (LEP) is a similar process used in HP Indigo presses that uses electrostatically charged ink instead of toner, and using a heated transfer roller instead of a fuser, that melts the charged ink particles ...
RGB printers have three, red, green, and blue, but may also have a "true black". Some ink jet printers may have additional cartridges, for example light cyan and light magenta in addition to the others, but this is rarely found in page printers. Multi-function devices provide additional functions such as copying, scanning, or Fax. Media ...
A black separation was processed on a white paper, while the remaining separations were processed on clear cellulose acetate. Around 1965, 3M invented an overlay system called Color Key. Basically, sheets of clear polyester were coated with UV-sensitive pigmented emulsions in the four process colors, cyan, magenta, yellow and black.