The image surface of a waterless plate is intaglio (recessed), allowing the plate to carry a greater volume of ink than a conventional plate does and allowing extremely high screen rulings, ranging from 300 to well over 800 lpi. (lines per inch). Waterless printing yields higher ink densities and a broader color spectrum than conventional offset printing does. Waterless plates used on sheetfed presses are commonly rated for runs of 100,000 to 200,000 impressions. The plates designed for use on web-offset presses can yield 300,000 to 500,000 impressions.