Adobe Acrobat 7 Professional Manual de usuario descargar pdf (Pagina 692)

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Grayscale working space options

You can specify a Grayscale working space profile that is based on the characteristics of a

particular dot gain. Dot gain occurs when a printer's halftone dots change as the ink

spreads and is absorbed by paper. Dot gain is the amount by which the expected dot

increases or decreases. For example, a 50% halftone screen may produce an actual density

of 60% on the printed page, exhibiting a dot gain of 10%. The Dot Gain 10% option

represents the color space that reflects the grayscale characteristics of this particular dot

gain.

Original image, proof (no dot gain), and printed image (with dot gain)

You can also specify a Grayscale working space profile that is based on the characteristics

of a particular gamma. A monitor's gamma setting determines the brightness of midtone

values displayed by the monitor. Gray Gamma 1.8 matches the default grayscale display

of Mac OS computers and is also the default grayscale space for Photoshop 4.0 and

earlier. Gray Gamma 2.2 matches the default grayscale display of Windows computers.

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