To send PostScript information without using the Conventional halftone settings, follow these steps:


  1. Go to File > Print.
  2. Select the Colors pane of the Print dialog.
  3. Change the Halftones pop-up menu selection from Conventional to Printer.


Background:

The printing industry uses standard screen angles, halftones, frequencies, and dot functions to lay the Cyan, Magenta, Yellow, and Black inks down on a page. These angles normally give the best coverage and color density for each color that is built by combining the various percentages of these inks. In QuarkXPress the default values for these settings are listed when Conventional is selected in the Halftones pop-up menu in the Colors pane of the Print dialog. used to print any layout to a PostScript printer. For solid colors the Conventional settings usually output without any problem. However, when printing raster images that have a defined resolution, as is the case with TIFF and Raster EPS files, the Conventional method of treating halftone information can cause dot patterns, called moiré patterns, to appear as the various inks are laid down at the press. Many high-resolution devices, such as imagesetters and composite PostScript printers, receive the Conventional settings at the RIP and execute a transform to the screen angles to adjust for possible moiré patterns for that specific device at a specific screen frequency (LPI, or Lines Per Inch). Other printer or imagesetter RIPS are set up to receive CMYK information with no Halftone adjustments from the source application and set their own halftone settings in order to avoid moiré patterns. If this is the case, QuarkXPress can send the PostScript halftone information down to the printer's RIP untouched so that all halftone information can be set at the printe