D

Density range

The difference between the lightest and darkest areas of an image. Also known as tonal range.

Digital proofing

Digital proofs are produced directly from an output device, as the result of a computer file - as opposed to a photo-mechanical proof.

Drum scanner

An extremely high resolution and pre-press scanner quality, that uses a high-speed rotating glass drum to scan transparencies and photographic images. Drum scanners give a much more detailed reproduction of an original than flat-bed desktop scanners and can capture a much greater range of tones. However, the gap between some of the top flatbed scanners and drum scanners is narrowing at a dramatic rate.

See also: Flatbed scanner