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Color Plate 35-2 to see the same image reproduced as a duotone, tritone, and quadtone.
Figure 35-5: This grayscale image is ready for transformation into a duotone.
Here’s how to create a duotone, tritone, or quadtone:
If the image isn’t already converted to grayscale, choose Image>Mode>Grayscale.
Choose Image>Mode>Duotone.The Duotone Options dialog box opens, showing that the image is currently set as a monotone. (See Figure 35-6.)
Figure 35-6: Use the Duotone Options dialog box to select ink colors.
Use the Type drop-down list to select Duotone, Tritone, or Quadtone.Depending upon which type you choose, 2, 3, or 4 ink swatches become available in the Duotone Options dialog box.
Click the ink color swatch next to each available ink option.The Color Picker opens.
Use the Color Picker to select a color.Or click Custom in the Color Picker to switch to the Custom Colors dialog box and select a matching system color swatch, such as Pantone Yellow 012C. (To find out more about custom color systems, turn to Technique 14.)As you select ink colors, you can preview the color combinations in the image window.
| Remember | If you choose custom inks, such as Pantone, Trumatch, or TOYO, what you see on-screen may not exactly match the ink color. To be sure you are selecting the ink colors you need, select them from a color swatch book. You can buy swatch books from the ink manufacturers or better art supply stores. Or if you are working with a commercial printer, the printer may have a swatch book you can borrow. |
Click OK to close the Color Picker and return to the Duotone Options dialog box.
Repeat Steps 4 through 6 for each ink color.
Click the Curve box to the left of the ink color swatch to set how the inks blend together.The Duotone Curve dialog box opens as shown in Figure 35-7.
Figure 35-7: : Drag the curve to adjust how much ink prints on the shadows, midtones, and highlights.
Drag the line on the graph to adjust how much ink prints on the shadows, midtones, and highlights.To find out more about curves, take a look at Technique 30.
Click OK to close the Duotone Curve dialog box and return to the Duotone Options dialog box.
Repeat Steps 8 through 10 to set the curves for each ink color.
Click OK to close the Duotone Options dialog box.
| Tip | After creating a duotone (or tritone or quadtone), you can always change the ink colors or curves settings by choosing Image>Mode>Duotone. Photoshop doesn’t reconvert the image; it just gives access to the Duotone Options dialog box. |
Powertone 2.0 by Creo is a Photoshop plug-in that creates “full color” duotones. Using an RGB or CMYK image and two ink colors that you select, Powertone creates the best match it can based on the original colors in the image. The duotones created by Powertone have more color depth than duotones created with the Photoshop Duotone color mode. If you’re going to use a duotone for any commercial job, such as a brochure or advertisement, visit www.creo.com and download a trial version of Powertone.
