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2. Printer tracking dots - Wikipedia

   en.wikipedia.org/wiki/Printer_tracking_dots

   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.

3. Aizuri-e - Wikipedia

   en.wikipedia.org/wiki/Aizuri-e

   When a second color is used, it is usually red. Even if only a single type of blue ink was used, variations in lightness and darkness ( value ) could be achieved by superimposing multiple printings of parts of the design or by the application of a gradation of ink to the wooden printing block ( bokashi ).

4. Color bleeding (printing) - Wikipedia

   en.wikipedia.org/wiki/Color_bleeding_(printing)

   In printing and graphic arts, mixing of two dissimilar colors in two adjacent printed dots before they dry and absorb in substrate is referred to as color bleeding. [1] Unless it is done for effect, color bleeding reduces print quality. Prior art applied this term to the phenomenon of single color ink following the fibers of the paper. [2]

5. Dither - Wikipedia

   en.wikipedia.org/wiki/Dither

   The ability of inkjet printers to print isolated dots has increased the use of dithering in printing. A typical desktop inkjet printer can print, at most, just 16 colors as this is the combination of dot or no dot from cyan, magenta, yellow and black print heads. [b] To reproduce a large range of colors, dithering is used. In densely printed ...

6. Under color removal - Wikipedia

   en.wikipedia.org/wiki/Under_color_removal

   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.

7. Non-photo blue - Wikipedia

   en.wikipedia.org/wiki/Non-photo_blue

   (1) Colour copy of non-photo blue pencil. (2) Colour copy of blue pen. (3) Grayscale copy of non-photo blue pencil. (4) Grayscale copy of blue pen. Non-photo blue (or non-repro blue) is a common tool in the graphic design and print industry, [1] [2] being a particular shade of blue that cannot be detected by graphic arts camera film. This ...