Xerox 550, 560 manual DCS desktop color separation, DCS-2, densitometer, density range, device

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DCS (desktop color separation)

An EPS format containing five files: four of the files contain the separated color information for each of the CMYK colors and the fifth is a low-resolution composite file for use in electronic page layout. DCS1 format has five separate files. One file acts as the preview and the other four contain the information for printing the different channels of CMYK color.

DCS-2

A desktop color separation (DCS) file with additional files that contain spot color information.

densitometer

An electronic instrument which measures the optical density of film or reflective media. A transmission densitometer is used to measure films while a reflection densitometer is used to measure photographs and ink laydown on press sheets.

density

A measurement of the ability of light to be absorbed by an ink and paper combination. A darker tone has a higher density than a lighter tone.

density range

The range of density from highlight to shadow on a film negative or positive or on the printed image. It is calculated as the mathematical difference between the densities of the darkest and the lightest tone values.

device

An individual occurrence of a physical device that reproduces an image. Devices have a type and a customer-specified name. Because the declaration of a device does not include its operating conditions—such as ink selection, type of screening, and paper— you cannot measure the color response of a device on its own. (In ICC terminology, the declaration of a device does include its operating conditions.)