About color printing
Halftone dots
Halftone dots are combinations of spots that create a printed dot. The dots shown here demonstrate different print resolutions. The illustration on the left contains 25 possible printer dot cells, which can create different gray values. The illustration on the right contains 256 printer dot cells, which allows for a greater range of grays. To print a visually convincing halftone image, you need at least 150 shades of gray.
Halftone dot shapes
Because toner reacts differently with different paper surfaces, the characteristics of your paper generally determine the screen ruling you should use (for example, dry ink/toner tends to spread on rough, absorbent grades of paper). Different dot shapes can enhance and improve output quality.
Solid background printing
Image quality is affected by the capabilities of your output device and the type of paper, or media, you are using. Keep in mind the following regarding the digital press:
•The maximum dry ink/toner coverage is 270 percent.
•The maximum color depth is 256 levels per color.
•The maximum color resolution is 600 dpi.
Media To obtain sharp and uniform prints, paper stocks should be smooth and be composed of uniformly distributed fibers. Paper formation is determined by the uniformity of paper fiber distribution. In color printing, paper formation influences the tendency to mottle, produce uneven spotty toner coverage, and in solid backgrounds it determines the sharpness of the color and its saturation.
Xerox media have been designed with evenly distributed fibers in its structure to yield crisp and
Paper quality can vary from one side to another. Good quality paper reduces these differences. Many suppliers use arrows on the paper ream label to indicate the preferred side for imaging.
2 About color printing
DocuColor 5252 Operator Manual |
