The Epson Epson Stylus Photo RX700 features Variable Size Dot Technology (VSDT) - another development in inkjet printing from Epson - which helps to dramatically increase the quality of your prints.
Ultramicrodots are incredibly small ink droplets, between three and six picolitres in size. Their dot diamater is up to four times smaller than the diameter of a human hair and close to the limit of resolution for the human eye. Ultramicrodots result in prints with much finer detail, less graininess and smoother gradations. The print quality is considerably enhanced.
Note: 1 picolitre (pl) = 0.000 000 000 001 litre
An increase in the number of dots per print can result in a slower print speed. To counter this effect (due to the use of Ultramicrodots) Epson have introduced Variable-sized Droplet functionality.
Under the control of the Epson Photo Enhance printer driver, different droplet sizes are produced on demand - choosing the appropriate size for the area of image being printed. It 's like painting a room; you use a large brush size for quick coverage and smaller, finer brushes for areas of detail.
Up to six different droplet sizes can be produced on demand.