This dot style also is called an index dot after the specific color mode and separation method that some printers use in Photoshop. This method is considered a frequency dot and differs from halftones in that the value represents how closely the dots are grouped (Figure 2). The most versatile are the round and ellipse shapes, although some printers occasionally use diamond or line halftones.Īnother method for creating value with dots in Photoshop is to use a square or stochastic dot (also referred to as diffusion dither). The standard choices are similar to those offered in most RIP software, such as round, diamond, ellipse, cross or line halftones (Figure 1). You can create halftones in the software anytime you convert a grayscale image into black-and-white (bitmap) mode. However, there are only a few options for creating halftones in Adobe Photoshop unless you buy plug-ins. ![]() ![]() So it makes sense to mix things up occasionally, especially if it could enhance your artwork. ![]() Different types of halftone dots create value ranges in unique ways that can influence the way artwork appears, and also in the way it prints.
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