Specifying dot gain

Dot gain or loss can occur when the specified printer's halftone dots change as the ink spreads and is absorbed by paper. As a general rule, you should not adjust the dot gain value until you have run a hard proof (which includes a calibration bar) and have measured the density values on the proof with a reflective densitometer. Adjust this value if your print shop has provided a different value for estimated dot gain.

The Custom CMYK dialog box gives you the following ways to specify a printer's dot gain:

• You can define a single dot gain value at the 50% level. This means that all four inks gain the same amount at 50%.

• You can set up to 13 values along the grayscale range to create a customized dot gain curve for one or more CMYK plates. Use this method if your proof has a significant color cast in its neutral gray values.

Understanding Adobe Photoshop Features You Will Use

Understanding Adobe Photoshop Features You Will Use

Adobe Photoshop can be a complex tool only because you can do so much with it, however for in this video series, we're going to keep it as simple as possible. In fact, in this video you'll see an overview of the few tools and Adobe Photoshop features we will use. When you see this video, you'll see how you can do so much with so few features, but you'll learn how to use them in depth in the future videos.

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