Printing duotones

When creating duotones, keep in mind that both the order in which the inks are printed and the screen angles you use have a significant effect on the final output.

Click the Auto button in the Halftone Screen dialog box to set the optimal screen angles and frequencies (choose File > Print, then choose Output from the pop‑up menu and click Screen). Be sure to select Use Accurate Screens in the Auto Screens dialog box, if you’re printing to a PostScript Level 2 (or higher) printer or an imagesetter equipped with an Emerald controller.

Note: The recommended screen angles and frequencies for quadtones are based on the assumption that channel 1 is the darkest ink and channel 4 is the lightest ink.

You do not have to convert duotone images to CMYK to print separations—simply choose Separations from the Profile pop‑up menu in the Color Management section of the Print dialog box (for setting printer options). Converting to CMYK mode converts any custom colors to their CMYK equivalents.

Photoshop

Printing duotones

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