To ensure that the final printed output is the color you want, consult your printer or service bureau and choose your custom color based on a printed color swatch. Manufacturers recommend that you get a new swatch book each year to compensate for fading inks and other damage.
Important: Photoshop prints custom colors to CMYK (process color) plates in every image mode except Duotone. To print true spot color plates, create spot color channels. (See "Adding spot colors (Photoshop)"on page 272.)
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