Xerox CX240, CX250 manual Destination Profile, Screening, Calibration

188 Appendix A– Setting Parameters

Destination Profile

¾Select the required profile. There is one predefined Spire CX250 color server profile, SpireDC250.

Screening

Screening converts Continuous-Tone (CT) and Line-Work (LW) images into information (halftone dots) that can be printed. The human eye “smooths out” this information, which seems visually consistent with the original picture. Thus, the more dots per inch, the more natural the image appears.

The Spire CX250 color server supports line screening. Screening is achieved by printing lines in an evenly-spaced pattern. The distance between screen lines is fixed, and the line thickness varies, depending on the intensity of color required for the job.

Using screening, printers can work with even amounts of toner and still produce a wide range of colors. The darker the color, the thicker the line. In this manner, screens give the appearance of different toner quantities printed in a certain area.

The Spire CX250 color server currently supports a line screen of 200 lpi (200C is the default setting). The screen of each separation is printed at a different angle.

Calibration

The purpose of color calibration is to achieve a consistent level of color quality. Calibration corrects printer colors by measuring a color density chart.

The Spire CX250 color server calibration tool enables you to create calibration tables, either through an automatic process or by editing an existing calibration table. The available calibration options are Normal, Saturated, and None.

For more information about calibration tables, see Calibration Overview on page 108.

The Calibration parameter enables you to select the required calibration table for the job.