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Chapter 22. Print > Producing duotones

Producing duotones

Only about 50 shades of an ink color can be printed from one plate, so print shops are sometimes asked to print a grayscale image using two or more plates instead of one, adding midtones or highlights to extend an image’s tonal range. The additional plates can be gray or a color tint. You can convert an image to Duotone mode in Photoshop to create a duotone (two plates), tritone (three plates), or quadtone (four plates).

Note: Duotone printing is tricky, so be sure to ask your print shop for advice. A duotone effect can’t be proofed on a PostScript color printer, though; only a press proof is reliable. If you’re a novice at duotones, try using one of the duotone (or tritone or quadtone) curves presets provided by Photoshop.


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